diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c3e93f9..f4232fc 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -1,5 +1,5 @@
 ###############################################################################
-#  Copyright (c) 2014-2023 libbitcoin-protocol developers (see COPYING).
+#  Copyright (c) 2014-2025 libbitcoin-protocol developers (see COPYING).
 #
 #         GENERATED SOURCE CODE, DO NOT EDIT EXCEPT EXPERIMENTALLY
 #
diff --git a/Makefile.am b/Makefile.am
index 115715d..3c4db26 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -1,5 +1,5 @@
 ###############################################################################
-#  Copyright (c) 2014-2023 libbitcoin-protocol developers (see COPYING).
+#  Copyright (c) 2014-2025 libbitcoin-protocol developers (see COPYING).
 #
 #         GENERATED SOURCE CODE, DO NOT EDIT EXCEPT EXPERIMENTALLY
 #
diff --git a/autogen.sh b/autogen.sh
index 34b1759..04e5e70 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -1,6 +1,6 @@
 #!/bin/sh
 ###############################################################################
-#  Copyright (c) 2014-2023 libbitcoin-protocol developers (see COPYING).
+#  Copyright (c) 2014-2025 libbitcoin-protocol developers (see COPYING).
 #
 #         GENERATED SOURCE CODE, DO NOT EDIT EXCEPT EXPERIMENTALLY
 #
diff --git a/build.cmd b/build.cmd
index 2b6638e..674802a 100644
--- a/build.cmd
+++ b/build.cmd
@@ -1,5 +1,5 @@
 REM ###########################################################################
-REM #  Copyright (c) 2014-2023 libbitcoin-protocol developers (see COPYING).
+REM #  Copyright (c) 2014-2025 libbitcoin-protocol developers (see COPYING).
 REM #
 REM #         GENERATED SOURCE CODE, DO NOT EDIT EXCEPT EXPERIMENTALLY
 REM #
diff --git a/builds/cmake/CMakeLists.txt b/builds/cmake/CMakeLists.txt
index 0909561..a458fdd 100644
--- a/builds/cmake/CMakeLists.txt
+++ b/builds/cmake/CMakeLists.txt
@@ -1,5 +1,5 @@
 ###############################################################################
-#  Copyright (c) 2014-2023 libbitcoin-protocol developers (see COPYING).
+#  Copyright (c) 2014-2025 libbitcoin-protocol developers (see COPYING).
 #
 #         GENERATED SOURCE CODE, DO NOT EDIT EXCEPT EXPERIMENTALLY
 #
diff --git a/builds/cmake/modules/FindBitcoin-System.cmake b/builds/cmake/modules/FindBitcoin-System.cmake
index 63f4083..9a8693e 100644
--- a/builds/cmake/modules/FindBitcoin-System.cmake
+++ b/builds/cmake/modules/FindBitcoin-System.cmake
@@ -1,5 +1,5 @@
 ###############################################################################
-#  Copyright (c) 2014-2023 libbitcoin-protocol developers (see COPYING).
+#  Copyright (c) 2014-2025 libbitcoin-protocol developers (see COPYING).
 #
 #         GENERATED SOURCE CODE, DO NOT EDIT EXCEPT EXPERIMENTALLY
 #
diff --git a/builds/cmake/modules/FindMbedtls.cmake b/builds/cmake/modules/FindMbedtls.cmake
index 03a534d..ae71c87 100644
--- a/builds/cmake/modules/FindMbedtls.cmake
+++ b/builds/cmake/modules/FindMbedtls.cmake
@@ -1,5 +1,5 @@
 ###############################################################################
-#  Copyright (c) 2014-2023 libbitcoin developers (see COPYING).
+#  Copyright (c) 2014-2025 libbitcoin developers (see COPYING).
 #
 ###############################################################################
 # FindMbedtls
diff --git a/builds/cmake/modules/FindZmq.cmake b/builds/cmake/modules/FindZmq.cmake
index 3d5dada..d9313b0 100644
--- a/builds/cmake/modules/FindZmq.cmake
+++ b/builds/cmake/modules/FindZmq.cmake
@@ -1,5 +1,5 @@
 ###############################################################################
-#  Copyright (c) 2014-2023 libbitcoin-protocol developers (see COPYING).
+#  Copyright (c) 2014-2025 libbitcoin-protocol developers (see COPYING).
 #
 #         GENERATED SOURCE CODE, DO NOT EDIT EXCEPT EXPERIMENTALLY
 #
diff --git a/builds/msvc/debug.natvis b/builds/msvc/debug.natvis
index 4867d1d..763ee1b 100644
--- a/builds/msvc/debug.natvis
+++ b/builds/msvc/debug.natvis
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!--
- |  Copyright (c) 2014-2023 libbitcoin-protocol developers (see COPYING).
+ |  Copyright (c) 2014-2025 libbitcoin-protocol developers (see COPYING).
  |
  |         GENERATED SOURCE CODE, DO NOT EDIT EXCEPT EXPERIMENTALLY
  |
diff --git a/builds/msvc/vs2022/libbitcoin-protocol-test/libbitcoin-protocol-test.vcxproj b/builds/msvc/vs2022/libbitcoin-protocol-test/libbitcoin-protocol-test.vcxproj
index 6397c64..142652b 100644
--- a/builds/msvc/vs2022/libbitcoin-protocol-test/libbitcoin-protocol-test.vcxproj
+++ b/builds/msvc/vs2022/libbitcoin-protocol-test/libbitcoin-protocol-test.vcxproj
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!--
- |  Copyright (c) 2014-2023 libbitcoin-protocol developers (see COPYING).
+ |  Copyright (c) 2014-2025 libbitcoin-protocol developers (see COPYING).
  |
  |         GENERATED SOURCE CODE, DO NOT EDIT EXCEPT EXPERIMENTALLY
  |
diff --git a/builds/msvc/vs2022/libbitcoin-protocol-test/libbitcoin-protocol-test.vcxproj.filters b/builds/msvc/vs2022/libbitcoin-protocol-test/libbitcoin-protocol-test.vcxproj.filters
index b9e25c2..6634e5a 100644
--- a/builds/msvc/vs2022/libbitcoin-protocol-test/libbitcoin-protocol-test.vcxproj.filters
+++ b/builds/msvc/vs2022/libbitcoin-protocol-test/libbitcoin-protocol-test.vcxproj.filters
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!--
- |  Copyright (c) 2014-2023 libbitcoin-protocol developers (see COPYING).
+ |  Copyright (c) 2014-2025 libbitcoin-protocol developers (see COPYING).
  |
  |         GENERATED SOURCE CODE, DO NOT EDIT EXCEPT EXPERIMENTALLY
  |
diff --git a/builds/msvc/vs2022/libbitcoin-protocol-test/packages.config b/builds/msvc/vs2022/libbitcoin-protocol-test/packages.config
index 71c0da7..5fb223a 100644
--- a/builds/msvc/vs2022/libbitcoin-protocol-test/packages.config
+++ b/builds/msvc/vs2022/libbitcoin-protocol-test/packages.config
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!--
- |  Copyright (c) 2014-2023 libbitcoin-protocol developers (see COPYING).
+ |  Copyright (c) 2014-2025 libbitcoin-protocol developers (see COPYING).
  |
  |         GENERATED SOURCE CODE, DO NOT EDIT EXCEPT EXPERIMENTALLY
  |
diff --git a/builds/msvc/vs2022/libbitcoin-protocol/libbitcoin-protocol.vcxproj b/builds/msvc/vs2022/libbitcoin-protocol/libbitcoin-protocol.vcxproj
index 019ae4e..8630291 100644
--- a/builds/msvc/vs2022/libbitcoin-protocol/libbitcoin-protocol.vcxproj
+++ b/builds/msvc/vs2022/libbitcoin-protocol/libbitcoin-protocol.vcxproj
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!--
- |  Copyright (c) 2014-2023 libbitcoin-protocol developers (see COPYING).
+ |  Copyright (c) 2014-2025 libbitcoin-protocol developers (see COPYING).
  |
  |         GENERATED SOURCE CODE, DO NOT EDIT EXCEPT EXPERIMENTALLY
  |
diff --git a/builds/msvc/vs2022/libbitcoin-protocol/libbitcoin-protocol.vcxproj.filters b/builds/msvc/vs2022/libbitcoin-protocol/libbitcoin-protocol.vcxproj.filters
index a27eb3d..1c7822c 100644
--- a/builds/msvc/vs2022/libbitcoin-protocol/libbitcoin-protocol.vcxproj.filters
+++ b/builds/msvc/vs2022/libbitcoin-protocol/libbitcoin-protocol.vcxproj.filters
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!--
- |  Copyright (c) 2014-2023 libbitcoin-protocol developers (see COPYING).
+ |  Copyright (c) 2014-2025 libbitcoin-protocol developers (see COPYING).
  |
  |         GENERATED SOURCE CODE, DO NOT EDIT EXCEPT EXPERIMENTALLY
  |
diff --git a/builds/msvc/vs2022/libbitcoin-protocol/packages.config b/builds/msvc/vs2022/libbitcoin-protocol/packages.config
index 0221c2c..bbaa1ee 100644
--- a/builds/msvc/vs2022/libbitcoin-protocol/packages.config
+++ b/builds/msvc/vs2022/libbitcoin-protocol/packages.config
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!--
- |  Copyright (c) 2014-2023 libbitcoin-protocol developers (see COPYING).
+ |  Copyright (c) 2014-2025 libbitcoin-protocol developers (see COPYING).
  |
  |         GENERATED SOURCE CODE, DO NOT EDIT EXCEPT EXPERIMENTALLY
  |
diff --git a/configure.ac b/configure.ac
index 99f9b0c..e30749d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,5 +1,5 @@
 ###############################################################################
-#  Copyright (c) 2014-2023 libbitcoin-protocol developers (see COPYING).
+#  Copyright (c) 2014-2025 libbitcoin-protocol developers (see COPYING).
 #
 #         GENERATED SOURCE CODE, DO NOT EDIT EXCEPT EXPERIMENTALLY
 #
diff --git a/include/bitcoin/protocol.hpp b/include/bitcoin/protocol.hpp
index bba96b8..0bfd757 100644
--- a/include/bitcoin/protocol.hpp
+++ b/include/bitcoin/protocol.hpp
@@ -1,5 +1,5 @@
 ///////////////////////////////////////////////////////////////////////////////
-// Copyright (c) 2014-2023 libbitcoin-protocol developers (see COPYING).
+// Copyright (c) 2014-2025 libbitcoin-protocol developers (see COPYING).
 //
 //        GENERATED SOURCE CODE, DO NOT EDIT EXCEPT EXPERIMENTALLY
 //
diff --git a/include/bitcoin/protocol/boost.hpp b/include/bitcoin/protocol/boost.hpp
index 4955fce..bb44e47 100644
--- a/include/bitcoin/protocol/boost.hpp
+++ b/include/bitcoin/protocol/boost.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2025 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/protocol/config/authority.hpp b/include/bitcoin/protocol/config/authority.hpp
index d00dc00..b7aa32c 100644
--- a/include/bitcoin/protocol/config/authority.hpp
+++ b/include/bitcoin/protocol/config/authority.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2025 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/protocol/config/config.hpp b/include/bitcoin/protocol/config/config.hpp
index 41a6083..ac8b612 100644
--- a/include/bitcoin/protocol/config/config.hpp
+++ b/include/bitcoin/protocol/config/config.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2025 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/protocol/config/endpoint.hpp b/include/bitcoin/protocol/config/endpoint.hpp
index 2f21b20..f033b62 100644
--- a/include/bitcoin/protocol/config/endpoint.hpp
+++ b/include/bitcoin/protocol/config/endpoint.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2025 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/protocol/config/sodium.hpp b/include/bitcoin/protocol/config/sodium.hpp
index f2207ab..c3504bc 100644
--- a/include/bitcoin/protocol/config/sodium.hpp
+++ b/include/bitcoin/protocol/config/sodium.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2025 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/protocol/define.hpp b/include/bitcoin/protocol/define.hpp
index c3bad7e..7016c46 100644
--- a/include/bitcoin/protocol/define.hpp
+++ b/include/bitcoin/protocol/define.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2025 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/protocol/network.hpp b/include/bitcoin/protocol/network.hpp
index fc30224..5cae347 100644
--- a/include/bitcoin/protocol/network.hpp
+++ b/include/bitcoin/protocol/network.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2025 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/protocol/settings.hpp b/include/bitcoin/protocol/settings.hpp
index d799c49..8adb99d 100644
--- a/include/bitcoin/protocol/settings.hpp
+++ b/include/bitcoin/protocol/settings.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2025 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/protocol/version.hpp b/include/bitcoin/protocol/version.hpp
index a9fd3ef..f756a9c 100644
--- a/include/bitcoin/protocol/version.hpp
+++ b/include/bitcoin/protocol/version.hpp
@@ -1,5 +1,5 @@
 ///////////////////////////////////////////////////////////////////////////////
-// Copyright (c) 2014-2023 libbitcoin-protocol developers (see COPYING).
+// Copyright (c) 2014-2025 libbitcoin-protocol developers (see COPYING).
 //
 //        GENERATED SOURCE CODE, DO NOT EDIT EXCEPT EXPERIMENTALLY
 //
diff --git a/include/bitcoin/protocol/zmq/authenticator.hpp b/include/bitcoin/protocol/zmq/authenticator.hpp
index 3c8f314..2828894 100644
--- a/include/bitcoin/protocol/zmq/authenticator.hpp
+++ b/include/bitcoin/protocol/zmq/authenticator.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2025 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/protocol/zmq/certificate.hpp b/include/bitcoin/protocol/zmq/certificate.hpp
index 8e9c64c..72c0c2d 100644
--- a/include/bitcoin/protocol/zmq/certificate.hpp
+++ b/include/bitcoin/protocol/zmq/certificate.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2025 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/protocol/zmq/context.hpp b/include/bitcoin/protocol/zmq/context.hpp
index 2ca4aa2..2cdc075 100644
--- a/include/bitcoin/protocol/zmq/context.hpp
+++ b/include/bitcoin/protocol/zmq/context.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2025 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/protocol/zmq/error.hpp b/include/bitcoin/protocol/zmq/error.hpp
index 11f9da4..4a91b4f 100644
--- a/include/bitcoin/protocol/zmq/error.hpp
+++ b/include/bitcoin/protocol/zmq/error.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2025 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/protocol/zmq/frame.hpp b/include/bitcoin/protocol/zmq/frame.hpp
index a974a0d..8c68b60 100644
--- a/include/bitcoin/protocol/zmq/frame.hpp
+++ b/include/bitcoin/protocol/zmq/frame.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2025 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/protocol/zmq/identifiers.hpp b/include/bitcoin/protocol/zmq/identifiers.hpp
index 704e166..a2d73a1 100644
--- a/include/bitcoin/protocol/zmq/identifiers.hpp
+++ b/include/bitcoin/protocol/zmq/identifiers.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2025 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/protocol/zmq/message.hpp b/include/bitcoin/protocol/zmq/message.hpp
index a26decf..58a4c31 100644
--- a/include/bitcoin/protocol/zmq/message.hpp
+++ b/include/bitcoin/protocol/zmq/message.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2025 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/protocol/zmq/poller.hpp b/include/bitcoin/protocol/zmq/poller.hpp
index 8244953..2162159 100644
--- a/include/bitcoin/protocol/zmq/poller.hpp
+++ b/include/bitcoin/protocol/zmq/poller.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2025 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/protocol/zmq/socket.hpp b/include/bitcoin/protocol/zmq/socket.hpp
index 22c71ee..7ca2347 100644
--- a/include/bitcoin/protocol/zmq/socket.hpp
+++ b/include/bitcoin/protocol/zmq/socket.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2025 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/protocol/zmq/worker.hpp b/include/bitcoin/protocol/zmq/worker.hpp
index 373fdba..ab8c137 100644
--- a/include/bitcoin/protocol/zmq/worker.hpp
+++ b/include/bitcoin/protocol/zmq/worker.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2025 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/include/bitcoin/protocol/zmq/zeromq.hpp b/include/bitcoin/protocol/zmq/zeromq.hpp
index 546bf6a..61f446d 100644
--- a/include/bitcoin/protocol/zmq/zeromq.hpp
+++ b/include/bitcoin/protocol/zmq/zeromq.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2025 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/install-cmake.sh b/install-cmake.sh
index c02fe6d..3f59ae4 100755
--- a/install-cmake.sh
+++ b/install-cmake.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 ###############################################################################
-#  Copyright (c) 2014-2023 libbitcoin-protocol developers (see COPYING).
+#  Copyright (c) 2014-2025 libbitcoin-protocol developers (see COPYING).
 #
 #         GENERATED SOURCE CODE, DO NOT EDIT EXCEPT EXPERIMENTALLY
 #
@@ -39,6 +39,12 @@
 
 # Define constants.
 #==============================================================================
+# Branches for github dependencies.
+#------------------------------------------------------------------------------
+SECP256K1_BRANCH="v0.5.1"
+BITCOIN_SYSTEM_BRANCH="master"
+BITCOIN_PROTOCOL_BRANCH="master"
+
 # Sentinel for comparison of sequential build.
 #------------------------------------------------------------------------------
 SEQUENTIAL=1
@@ -933,12 +939,12 @@ build_all()
     export CPPFLAGS="$CPPFLAGS ${BOOST_FLAGS[@]}"
     build_from_tarball_boost "$BOOST_ARCHIVE" "$PARALLEL" "$BUILD_BOOST" "${BOOST_OPTIONS[@]}"
     export CPPFLAGS=$SAVE_CPPFLAGS
-    create_from_github bitcoin-core secp256k1 v0.5.1 "$BUILD_SECP256K1"
+    create_from_github bitcoin-core secp256k1 ${SECP256K1_BRANCH} "$BUILD_SECP256K1"
     local SAVE_CPPFLAGS="$CPPFLAGS"
     export CPPFLAGS="$CPPFLAGS ${SECP256K1_FLAGS[@]}"
     build_from_github secp256k1 "$PARALLEL" false "$BUILD_SECP256K1" "${SECP256K1_OPTIONS[@]}" $CUMULATIVE_FILTERED_ARGS
     export CPPFLAGS=$SAVE_CPPFLAGS
-    create_from_github libbitcoin libbitcoin-system master "yes"
+    create_from_github libbitcoin libbitcoin-system ${BITCOIN_SYSTEM_BRANCH} "yes"
     local SAVE_CPPFLAGS="$CPPFLAGS"
     export CPPFLAGS="$CPPFLAGS ${BITCOIN_SYSTEM_FLAGS[@]}"
     build_from_github_cmake libbitcoin-system "$PARALLEL" false "yes" "${BITCOIN_SYSTEM_OPTIONS[@]}" $CUMULATIVE_FILTERED_ARGS_CMAKE "$@"
@@ -946,7 +952,7 @@ build_all()
     local SAVE_CPPFLAGS="$CPPFLAGS"
     export CPPFLAGS="$CPPFLAGS ${BITCOIN_PROTOCOL_FLAGS[@]}"
     if [[ ! ($CI == true) ]]; then
-        create_from_github libbitcoin libbitcoin-protocol master "yes"
+        create_from_github libbitcoin libbitcoin-protocol ${BITCOIN_PROTOCOL_BRANCH} "yes"
         build_from_github_cmake libbitcoin-protocol "$PARALLEL" true "yes" "${BITCOIN_PROTOCOL_OPTIONS[@]}" $CUMULATIVE_FILTERED_ARGS_CMAKE "$@"
     else
         push_directory "$PRESUMED_CI_PROJECT_PATH"
diff --git a/install-cmakepresets.sh b/install-cmakepresets.sh
index 6462b45..3c14f53 100755
--- a/install-cmakepresets.sh
+++ b/install-cmakepresets.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 ###############################################################################
-#  Copyright (c) 2014-2023 libbitcoin-protocol developers (see COPYING).
+#  Copyright (c) 2014-2025 libbitcoin-protocol developers (see COPYING).
 #
 #         GENERATED SOURCE CODE, DO NOT EDIT EXCEPT EXPERIMENTALLY
 #
@@ -40,6 +40,12 @@
 
 # Define constants.
 #==============================================================================
+# Branches for github dependencies.
+#------------------------------------------------------------------------------
+SECP256K1_BRANCH="v0.5.1"
+BITCOIN_SYSTEM_BRANCH="master"
+BITCOIN_PROTOCOL_BRANCH="master"
+
 
 # Declare associative array for computed presets.
 #------------------------------------------------------------------------------
@@ -972,12 +978,12 @@ build_all()
     export CPPFLAGS="$CPPFLAGS ${BOOST_FLAGS[@]}"
     build_from_tarball_boost "$BOOST_ARCHIVE" "$PARALLEL" "$BUILD_BOOST" "${BOOST_OPTIONS[@]}"
     export CPPFLAGS=$SAVE_CPPFLAGS
-    create_from_github bitcoin-core secp256k1 v0.5.1 "$BUILD_SECP256K1"
+    create_from_github bitcoin-core secp256k1 ${SECP256K1_BRANCH} "$BUILD_SECP256K1"
     local SAVE_CPPFLAGS="$CPPFLAGS"
     export CPPFLAGS="$CPPFLAGS ${SECP256K1_FLAGS[@]}"
     build_from_github secp256k1 "$PARALLEL" false "$BUILD_SECP256K1" "${SECP256K1_OPTIONS[@]}" $CUMULATIVE_FILTERED_ARGS
     export CPPFLAGS=$SAVE_CPPFLAGS
-    create_from_github libbitcoin libbitcoin-system master "yes"
+    create_from_github libbitcoin libbitcoin-system ${BITCOIN_SYSTEM_BRANCH} "yes"
     local SAVE_CPPFLAGS="$CPPFLAGS"
     export CPPFLAGS="$CPPFLAGS ${BITCOIN_SYSTEM_FLAGS[@]}"
     display_message "libbitcoin-system PRESET ${REPO_PRESET[libbitcoin-system]}"
@@ -986,7 +992,7 @@ build_all()
     local SAVE_CPPFLAGS="$CPPFLAGS"
     export CPPFLAGS="$CPPFLAGS ${BITCOIN_PROTOCOL_FLAGS[@]}"
     if [[ ! ($CI == true) ]]; then
-        create_from_github libbitcoin libbitcoin-protocol master "yes"
+        create_from_github libbitcoin libbitcoin-protocol ${BITCOIN_PROTOCOL_BRANCH} "yes"
         display_message "libbitcoin-protocol PRESET ${REPO_PRESET[libbitcoin-protocol]}"
         build_from_github_cmake libbitcoin-protocol ${REPO_PRESET[libbitcoin-protocol]} "$PARALLEL" true             "yes" "${BITCOIN_PROTOCOL_OPTIONS[@]}" $CUMULATIVE_FILTERED_ARGS_CMAKE "$@"
     else
diff --git a/install.sh b/install.sh
index 83133e0..11cea3a 100755
--- a/install.sh
+++ b/install.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 ###############################################################################
-#  Copyright (c) 2014-2023 libbitcoin-protocol developers (see COPYING).
+#  Copyright (c) 2014-2025 libbitcoin-protocol developers (see COPYING).
 #
 #         GENERATED SOURCE CODE, DO NOT EDIT EXCEPT EXPERIMENTALLY
 #
@@ -39,6 +39,12 @@
 
 # Define constants.
 #==============================================================================
+# Branches for github dependencies.
+#------------------------------------------------------------------------------
+SECP256K1_BRANCH="v0.5.1"
+BITCOIN_SYSTEM_BRANCH="master"
+BITCOIN_PROTOCOL_BRANCH="master"
+
 # Sentinel for comparison of sequential build.
 #------------------------------------------------------------------------------
 SEQUENTIAL=1
@@ -808,12 +814,12 @@ build_all()
     export CPPFLAGS="$CPPFLAGS ${BOOST_FLAGS[@]}"
     build_from_tarball_boost "$BOOST_ARCHIVE" "$PARALLEL" "$BUILD_BOOST" "${BOOST_OPTIONS[@]}"
     export CPPFLAGS=$SAVE_CPPFLAGS
-    create_from_github bitcoin-core secp256k1 v0.5.1 "$BUILD_SECP256K1"
+    create_from_github bitcoin-core secp256k1 ${SECP256K1_BRANCH} "$BUILD_SECP256K1"
     local SAVE_CPPFLAGS="$CPPFLAGS"
     export CPPFLAGS="$CPPFLAGS ${SECP256K1_FLAGS[@]}"
     build_from_github secp256k1 "$PARALLEL" false "$BUILD_SECP256K1" "${SECP256K1_OPTIONS[@]}" "$@"
     export CPPFLAGS=$SAVE_CPPFLAGS
-    create_from_github libbitcoin libbitcoin-system master "yes"
+    create_from_github libbitcoin libbitcoin-system ${BITCOIN_SYSTEM_BRANCH} "yes"
     local SAVE_CPPFLAGS="$CPPFLAGS"
     export CPPFLAGS="$CPPFLAGS ${BITCOIN_SYSTEM_FLAGS[@]}"
     build_from_github libbitcoin-system "$PARALLEL" false "yes" "${BITCOIN_SYSTEM_OPTIONS[@]}" "$@"
@@ -821,7 +827,7 @@ build_all()
     local SAVE_CPPFLAGS="$CPPFLAGS"
     export CPPFLAGS="$CPPFLAGS ${BITCOIN_PROTOCOL_FLAGS[@]}"
     if [[ ! ($CI == true) ]]; then
-        create_from_github libbitcoin libbitcoin-protocol master "yes"
+        create_from_github libbitcoin libbitcoin-protocol ${BITCOIN_PROTOCOL_BRANCH} "yes"
         build_from_github libbitcoin-protocol "$PARALLEL" true "yes" "${BITCOIN_PROTOCOL_OPTIONS[@]}" "$@"
     else
         push_directory "$PRESUMED_CI_PROJECT_PATH"
diff --git a/libbitcoin-protocol-test_runner.sh b/libbitcoin-protocol-test_runner.sh
index 96076c7..8d4a057 100755
--- a/libbitcoin-protocol-test_runner.sh
+++ b/libbitcoin-protocol-test_runner.sh
@@ -1,6 +1,6 @@
 #!/bin/sh
 ###############################################################################
-#  Copyright (c) 2014-2023 libbitcoin-protocol developers (see COPYING).
+#  Copyright (c) 2014-2025 libbitcoin-protocol developers (see COPYING).
 #
 #         GENERATED SOURCE CODE, DO NOT EDIT EXCEPT EXPERIMENTALLY
 #
diff --git a/libbitcoin-protocol.pc.in b/libbitcoin-protocol.pc.in
index 652a8e2..5042d28 100644
--- a/libbitcoin-protocol.pc.in
+++ b/libbitcoin-protocol.pc.in
@@ -1,5 +1,5 @@
 ###############################################################################
-#  Copyright (c) 2014-2023 libbitcoin-protocol developers (see COPYING).
+#  Copyright (c) 2014-2025 libbitcoin-protocol developers (see COPYING).
 #
 #         GENERATED SOURCE CODE, DO NOT EDIT EXCEPT EXPERIMENTALLY
 #
diff --git a/src/config/authority.cpp b/src/config/authority.cpp
index bd22220..b5e2ee8 100644
--- a/src/config/authority.cpp
+++ b/src/config/authority.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2025 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/config/endpoint.cpp b/src/config/endpoint.cpp
index b68d835..bfe7c4f 100644
--- a/src/config/endpoint.cpp
+++ b/src/config/endpoint.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2025 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/config/sodium.cpp b/src/config/sodium.cpp
index 048425c..e089d4a 100644
--- a/src/config/sodium.cpp
+++ b/src/config/sodium.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2025 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/settings.cpp b/src/settings.cpp
index 25dc09a..d9f60d7 100644
--- a/src/settings.cpp
+++ b/src/settings.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2025 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/zmq/authenticator.cpp b/src/zmq/authenticator.cpp
index 596b175..65410c2 100644
--- a/src/zmq/authenticator.cpp
+++ b/src/zmq/authenticator.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2025 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/zmq/certificate.cpp b/src/zmq/certificate.cpp
index ffdffe0..28bcfa8 100644
--- a/src/zmq/certificate.cpp
+++ b/src/zmq/certificate.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2025 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/zmq/context.cpp b/src/zmq/context.cpp
index 8a3dfa2..b335ee3 100644
--- a/src/zmq/context.cpp
+++ b/src/zmq/context.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2025 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/zmq/error.cpp b/src/zmq/error.cpp
index 2a3b307..ab3bdce 100644
--- a/src/zmq/error.cpp
+++ b/src/zmq/error.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2025 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/zmq/frame.cpp b/src/zmq/frame.cpp
index 292b8cc..b79b483 100644
--- a/src/zmq/frame.cpp
+++ b/src/zmq/frame.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2025 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/zmq/identifiers.cpp b/src/zmq/identifiers.cpp
index 8ff6676..d7e7dd1 100644
--- a/src/zmq/identifiers.cpp
+++ b/src/zmq/identifiers.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2025 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/zmq/message.cpp b/src/zmq/message.cpp
index a82e0ef..f64a49b 100644
--- a/src/zmq/message.cpp
+++ b/src/zmq/message.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2025 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/zmq/poller.cpp b/src/zmq/poller.cpp
index e3ee868..bb379f5 100644
--- a/src/zmq/poller.cpp
+++ b/src/zmq/poller.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2025 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/zmq/socket.cpp b/src/zmq/socket.cpp
index 03a5487..22086e5 100644
--- a/src/zmq/socket.cpp
+++ b/src/zmq/socket.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2025 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/src/zmq/worker.cpp b/src/zmq/worker.cpp
index e0aa9a1..07a382d 100644
--- a/src/zmq/worker.cpp
+++ b/src/zmq/worker.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2025 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/converter.cpp b/test/converter.cpp
index 811d8b6..651c44e 100644
--- a/test/converter.cpp
+++ b/test/converter.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2025 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/main.cpp b/test/main.cpp
index 5e81aea..39276d6 100644
--- a/test/main.cpp
+++ b/test/main.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2025 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/test.cpp b/test/test.cpp
index 73e36b8..eb91ae1 100644
--- a/test/test.cpp
+++ b/test/test.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2025 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/test.hpp b/test/test.hpp
index d2f3891..9b7bb2a 100644
--- a/test/test.hpp
+++ b/test/test.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2025 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/utility.hpp b/test/utility.hpp
index 6a6f941..d0a33cd 100644
--- a/test/utility.hpp
+++ b/test/utility.hpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2025 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/zmq/authenticator.cpp b/test/zmq/authenticator.cpp
index fdf089a..364784e 100644
--- a/test/zmq/authenticator.cpp
+++ b/test/zmq/authenticator.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2025 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/zmq/certificate.cpp b/test/zmq/certificate.cpp
index b710f43..97b8a17 100644
--- a/test/zmq/certificate.cpp
+++ b/test/zmq/certificate.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2025 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/zmq/context.cpp b/test/zmq/context.cpp
index d1ad030..02955b9 100644
--- a/test/zmq/context.cpp
+++ b/test/zmq/context.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2025 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/zmq/error.cpp b/test/zmq/error.cpp
index f3c856c..ae0505e 100644
--- a/test/zmq/error.cpp
+++ b/test/zmq/error.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2025 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/zmq/frame.cpp b/test/zmq/frame.cpp
index 17ae002..6388193 100644
--- a/test/zmq/frame.cpp
+++ b/test/zmq/frame.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2025 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/zmq/identifiers.cpp b/test/zmq/identifiers.cpp
index cc32eed..fc193cc 100644
--- a/test/zmq/identifiers.cpp
+++ b/test/zmq/identifiers.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2025 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/zmq/message.cpp b/test/zmq/message.cpp
index 357bd8b..2a4c0b8 100644
--- a/test/zmq/message.cpp
+++ b/test/zmq/message.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2025 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/zmq/poller.cpp b/test/zmq/poller.cpp
index fe64bc0..0914c4d 100644
--- a/test/zmq/poller.cpp
+++ b/test/zmq/poller.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2025 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/zmq/socket.cpp b/test/zmq/socket.cpp
index 39300a6..4f6ef4e 100644
--- a/test/zmq/socket.cpp
+++ b/test/zmq/socket.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2025 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *
diff --git a/test/zmq/worker.cpp b/test/zmq/worker.cpp
index 28c2364..ca90e5b 100644
--- a/test/zmq/worker.cpp
+++ b/test/zmq/worker.cpp
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2011-2023 libbitcoin developers (see AUTHORS)
+ * Copyright (c) 2011-2025 libbitcoin developers (see AUTHORS)
  *
  * This file is part of libbitcoin.
  *