diff --git a/builds/msvc/vs2022/bn/bn.props b/builds/msvc/vs2022/bn/bn.props
index db7ebe48..9448b880 100644
--- a/builds/msvc/vs2022/bn/bn.props
+++ b/builds/msvc/vs2022/bn/bn.props
@@ -55,6 +55,7 @@
 
   <Target Name="LinkageInfo" BeforeTargets="PrepareForBuild">
     <Message Text="Linkage-secp256k1 : $(Linkage-secp256k1)" Importance="high"/>
+    <Message Text="Linkage-ultrafast : $(Linkage-ultrafast)" Importance="high"/>
     <Message Text="Linkage-_system   : $(Linkage-libbitcoin-system)" Importance="high"/>
     <Message Text="Linkage-_database : $(Linkage-libbitcoin-database)" Importance="high"/>
     <Message Text="Linkage-_network  : $(Linkage-libbitcoin-network)" Importance="high"/>
diff --git a/builds/msvc/vs2022/libbitcoin-node-test/libbitcoin-node-test.props b/builds/msvc/vs2022/libbitcoin-node-test/libbitcoin-node-test.props
index 3b92d0f5..f488377c 100644
--- a/builds/msvc/vs2022/libbitcoin-node-test/libbitcoin-node-test.props
+++ b/builds/msvc/vs2022/libbitcoin-node-test/libbitcoin-node-test.props
@@ -57,6 +57,7 @@
 
   <Target Name="LinkageInfo" BeforeTargets="PrepareForBuild">
     <Message Text="Linkage-secp256k1 : $(Linkage-secp256k1)" Importance="high"/>
+    <Message Text="Linkage-ultrafast : $(Linkage-ultrafast)" Importance="high"/>
     <Message Text="Linkage-_system   : $(Linkage-libbitcoin-system)" Importance="high"/>
     <Message Text="Linkage-_database : $(Linkage-libbitcoin-database)" Importance="high"/>
     <Message Text="Linkage-_network  : $(Linkage-libbitcoin-network)" Importance="high"/>
diff --git a/builds/msvc/vs2022/libbitcoin-node-test/libbitcoin-node-test.vcxproj b/builds/msvc/vs2022/libbitcoin-node-test/libbitcoin-node-test.vcxproj
index 5435ca43..ba0f259f 100644
--- a/builds/msvc/vs2022/libbitcoin-node-test/libbitcoin-node-test.vcxproj
+++ b/builds/msvc/vs2022/libbitcoin-node-test/libbitcoin-node-test.vcxproj
@@ -160,6 +160,7 @@
     <Import Project="$(NuGetPackageRoot)boost_thread-vc143.1.86.0\build\boost_thread-vc143.targets" Condition="Exists('$(NuGetPackageRoot)boost_thread-vc143.1.86.0\build\boost_thread-vc143.targets')" />
     <Import Project="$(NuGetPackageRoot)boost_url-vc143.1.86.0\build\boost_url-vc143.targets" Condition="Exists('$(NuGetPackageRoot)boost_url-vc143.1.86.0\build\boost_url-vc143.targets')" />
     <Import Project="$(NuGetPackageRoot)secp256k1_vc143.0.6.1\build\native\secp256k1_vc143.targets" Condition="Exists('$(NuGetPackageRoot)secp256k1_vc143.0.6.1\build\native\secp256k1_vc143.targets')" />
+    <Import Project="$(NuGetPackageRoot)UltrafastSecp256k1-vc143.4.1.1.7\build\native\UltrafastSecp256k1-vc143.targets" Condition="Exists('$(NuGetPackageRoot)UltrafastSecp256k1-vc143.4.1.1.7\build\native\UltrafastSecp256k1-vc143.targets')" />
     <Import Project="$(NuGetPackageRoot)boost_unit_test_framework-vc143.1.86.0\build\boost_unit_test_framework-vc143.targets" Condition="Exists('$(NuGetPackageRoot)boost_unit_test_framework-vc143.1.86.0\build\boost_unit_test_framework-vc143.targets')" />
   </ImportGroup>
   <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
@@ -175,6 +176,7 @@
     <Error Condition="!Exists('$(NuGetPackageRoot)boost_thread-vc143.1.86.0\build\boost_thread-vc143.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(NuGetPackageRoot)boost_thread-vc143.1.86.0\build\boost_thread-vc143.targets'))" />
     <Error Condition="!Exists('$(NuGetPackageRoot)boost_url-vc143.1.86.0\build\boost_url-vc143.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(NuGetPackageRoot)boost_url-vc143.1.86.0\build\boost_url-vc143.targets'))" />
     <Error Condition="!Exists('$(NuGetPackageRoot)secp256k1_vc143.0.6.1\build\native\secp256k1_vc143.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(NuGetPackageRoot)secp256k1_vc143.0.6.1\build\native\secp256k1_vc143.targets'))" />
+    <Error Condition="!Exists('$(NuGetPackageRoot)UltrafastSecp256k1-vc143.4.1.1.7\build\native\UltrafastSecp256k1-vc143.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(NuGetPackageRoot)UltrafastSecp256k1-vc143.4.1.1.7\build\native\UltrafastSecp256k1-vc143.targets'))" />
     <Error Condition="!Exists('$(NuGetPackageRoot)boost_unit_test_framework-vc143.1.86.0\build\boost_unit_test_framework-vc143.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(NuGetPackageRoot)boost_unit_test_framework-vc143.1.86.0\build\boost_unit_test_framework-vc143.targets'))" />
   </Target>
   <ItemGroup>
diff --git a/builds/msvc/vs2022/libbitcoin-node-test/packages.config b/builds/msvc/vs2022/libbitcoin-node-test/packages.config
index cbdbf9a1..75e564d3 100644
--- a/builds/msvc/vs2022/libbitcoin-node-test/packages.config
+++ b/builds/msvc/vs2022/libbitcoin-node-test/packages.config
@@ -6,6 +6,7 @@
  |
  -->
 <packages>
+  <package id="UltrafastSecp256k1-vc143" version="4.1.1.7" targetFramework="Native" />
   <package id="boost" version="1.86.0" targetFramework="Native" />
   <package id="boost_container-vc143" version="1.86.0" targetFramework="Native" />
   <package id="boost_iostreams-vc143" version="1.86.0" targetFramework="Native" />
diff --git a/builds/msvc/vs2022/libbitcoin-node/libbitcoin-node.props b/builds/msvc/vs2022/libbitcoin-node/libbitcoin-node.props
index 100424c8..6214b253 100644
--- a/builds/msvc/vs2022/libbitcoin-node/libbitcoin-node.props
+++ b/builds/msvc/vs2022/libbitcoin-node/libbitcoin-node.props
@@ -59,6 +59,7 @@
 
   <Target Name="LinkageInfo" BeforeTargets="PrepareForBuild">
     <Message Text="Linkage-secp256k1 : $(Linkage-secp256k1)" Importance="high"/>
+    <Message Text="Linkage-ultrafast : $(Linkage-ultrafast)" Importance="high"/>
     <Message Text="Linkage-_system   : $(Linkage-libbitcoin-system)" Importance="high"/>
     <Message Text="Linkage-_database : $(Linkage-libbitcoin-database)" Importance="high"/>
     <Message Text="Linkage-_network  : $(Linkage-libbitcoin-network)" Importance="high"/>
diff --git a/builds/msvc/vs2022/libbitcoin-node/libbitcoin-node.vcxproj b/builds/msvc/vs2022/libbitcoin-node/libbitcoin-node.vcxproj
index 42e68b87..884cf244 100644
--- a/builds/msvc/vs2022/libbitcoin-node/libbitcoin-node.vcxproj
+++ b/builds/msvc/vs2022/libbitcoin-node/libbitcoin-node.vcxproj
@@ -238,6 +238,7 @@
     <Import Project="$(NuGetPackageRoot)boost_thread-vc143.1.86.0\build\boost_thread-vc143.targets" Condition="Exists('$(NuGetPackageRoot)boost_thread-vc143.1.86.0\build\boost_thread-vc143.targets')" />
     <Import Project="$(NuGetPackageRoot)boost_url-vc143.1.86.0\build\boost_url-vc143.targets" Condition="Exists('$(NuGetPackageRoot)boost_url-vc143.1.86.0\build\boost_url-vc143.targets')" />
     <Import Project="$(NuGetPackageRoot)secp256k1_vc143.0.6.1\build\native\secp256k1_vc143.targets" Condition="Exists('$(NuGetPackageRoot)secp256k1_vc143.0.6.1\build\native\secp256k1_vc143.targets')" />
+    <Import Project="$(NuGetPackageRoot)UltrafastSecp256k1-vc143.4.1.1.7\build\native\UltrafastSecp256k1-vc143.targets" Condition="Exists('$(NuGetPackageRoot)UltrafastSecp256k1-vc143.4.1.1.7\build\native\UltrafastSecp256k1-vc143.targets')" />
   </ImportGroup>
   <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
     <PropertyGroup>
@@ -252,6 +253,7 @@
     <Error Condition="!Exists('$(NuGetPackageRoot)boost_thread-vc143.1.86.0\build\boost_thread-vc143.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(NuGetPackageRoot)boost_thread-vc143.1.86.0\build\boost_thread-vc143.targets'))" />
     <Error Condition="!Exists('$(NuGetPackageRoot)boost_url-vc143.1.86.0\build\boost_url-vc143.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(NuGetPackageRoot)boost_url-vc143.1.86.0\build\boost_url-vc143.targets'))" />
     <Error Condition="!Exists('$(NuGetPackageRoot)secp256k1_vc143.0.6.1\build\native\secp256k1_vc143.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(NuGetPackageRoot)secp256k1_vc143.0.6.1\build\native\secp256k1_vc143.targets'))" />
+    <Error Condition="!Exists('$(NuGetPackageRoot)UltrafastSecp256k1-vc143.4.1.1.7\build\native\UltrafastSecp256k1-vc143.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(NuGetPackageRoot)UltrafastSecp256k1-vc143.4.1.1.7\build\native\UltrafastSecp256k1-vc143.targets'))" />
   </Target>
   <ItemGroup>
     <Natvis Include="..\..\debug.natvis" />
diff --git a/builds/msvc/vs2022/libbitcoin-node/packages.config b/builds/msvc/vs2022/libbitcoin-node/packages.config
index f6d72ac9..f85982f3 100644
--- a/builds/msvc/vs2022/libbitcoin-node/packages.config
+++ b/builds/msvc/vs2022/libbitcoin-node/packages.config
@@ -6,6 +6,7 @@
  |
  -->
 <packages>
+  <package id="UltrafastSecp256k1-vc143" version="4.1.1.7" targetFramework="Native" />
   <package id="boost" version="1.86.0" targetFramework="Native" />
   <package id="boost_container-vc143" version="1.86.0" targetFramework="Native" />
   <package id="boost_iostreams-vc143" version="1.86.0" targetFramework="Native" />
diff --git a/builds/msvc/vs2026/bn/bn.props b/builds/msvc/vs2026/bn/bn.props
index db7ebe48..9448b880 100644
--- a/builds/msvc/vs2026/bn/bn.props
+++ b/builds/msvc/vs2026/bn/bn.props
@@ -55,6 +55,7 @@
 
   <Target Name="LinkageInfo" BeforeTargets="PrepareForBuild">
     <Message Text="Linkage-secp256k1 : $(Linkage-secp256k1)" Importance="high"/>
+    <Message Text="Linkage-ultrafast : $(Linkage-ultrafast)" Importance="high"/>
     <Message Text="Linkage-_system   : $(Linkage-libbitcoin-system)" Importance="high"/>
     <Message Text="Linkage-_database : $(Linkage-libbitcoin-database)" Importance="high"/>
     <Message Text="Linkage-_network  : $(Linkage-libbitcoin-network)" Importance="high"/>
diff --git a/builds/msvc/vs2026/libbitcoin-node-test/libbitcoin-node-test.props b/builds/msvc/vs2026/libbitcoin-node-test/libbitcoin-node-test.props
index 3b92d0f5..f488377c 100644
--- a/builds/msvc/vs2026/libbitcoin-node-test/libbitcoin-node-test.props
+++ b/builds/msvc/vs2026/libbitcoin-node-test/libbitcoin-node-test.props
@@ -57,6 +57,7 @@
 
   <Target Name="LinkageInfo" BeforeTargets="PrepareForBuild">
     <Message Text="Linkage-secp256k1 : $(Linkage-secp256k1)" Importance="high"/>
+    <Message Text="Linkage-ultrafast : $(Linkage-ultrafast)" Importance="high"/>
     <Message Text="Linkage-_system   : $(Linkage-libbitcoin-system)" Importance="high"/>
     <Message Text="Linkage-_database : $(Linkage-libbitcoin-database)" Importance="high"/>
     <Message Text="Linkage-_network  : $(Linkage-libbitcoin-network)" Importance="high"/>
diff --git a/builds/msvc/vs2026/libbitcoin-node-test/libbitcoin-node-test.vcxproj b/builds/msvc/vs2026/libbitcoin-node-test/libbitcoin-node-test.vcxproj
index d1e260ec..a13ce22f 100644
--- a/builds/msvc/vs2026/libbitcoin-node-test/libbitcoin-node-test.vcxproj
+++ b/builds/msvc/vs2026/libbitcoin-node-test/libbitcoin-node-test.vcxproj
@@ -160,6 +160,7 @@
     <Import Project="$(NuGetPackageRoot)libbitcoin-boost_thread-vc145.1.91.0\build\libbitcoin-boost_thread-vc145.targets" Condition="Exists('$(NuGetPackageRoot)libbitcoin-boost_thread-vc145.1.91.0\build\libbitcoin-boost_thread-vc145.targets')" />
     <Import Project="$(NuGetPackageRoot)libbitcoin-boost_url-vc145.1.91.0\build\libbitcoin-boost_url-vc145.targets" Condition="Exists('$(NuGetPackageRoot)libbitcoin-boost_url-vc145.1.91.0\build\libbitcoin-boost_url-vc145.targets')" />
     <Import Project="$(NuGetPackageRoot)secp256k1_vc145.0.6.1.2\build\native\secp256k1_vc145.targets" Condition="Exists('$(NuGetPackageRoot)secp256k1_vc145.0.6.1.2\build\native\secp256k1_vc145.targets')" />
+    <Import Project="$(NuGetPackageRoot)UltrafastSecp256k1-vc145.4.1.1.7\build\native\UltrafastSecp256k1-vc145.targets" Condition="Exists('$(NuGetPackageRoot)UltrafastSecp256k1-vc145.4.1.1.7\build\native\UltrafastSecp256k1-vc145.targets')" />
     <Import Project="$(NuGetPackageRoot)libbitcoin-boost_unit_test_framework-vc145.1.91.0\build\libbitcoin-boost_unit_test_framework-vc145.targets" Condition="Exists('$(NuGetPackageRoot)libbitcoin-boost_unit_test_framework-vc145.1.91.0\build\libbitcoin-boost_unit_test_framework-vc145.targets')" />
   </ImportGroup>
   <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
@@ -175,6 +176,7 @@
     <Error Condition="!Exists('$(NuGetPackageRoot)libbitcoin-boost_thread-vc145.1.91.0\build\libbitcoin-boost_thread-vc145.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(NuGetPackageRoot)libbitcoin-boost_thread-vc145.1.91.0\build\libbitcoin-boost_thread-vc145.targets'))" />
     <Error Condition="!Exists('$(NuGetPackageRoot)libbitcoin-boost_url-vc145.1.91.0\build\libbitcoin-boost_url-vc145.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(NuGetPackageRoot)libbitcoin-boost_url-vc145.1.91.0\build\libbitcoin-boost_url-vc145.targets'))" />
     <Error Condition="!Exists('$(NuGetPackageRoot)secp256k1_vc145.0.6.1.2\build\native\secp256k1_vc145.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(NuGetPackageRoot)secp256k1_vc145.0.6.1.2\build\native\secp256k1_vc145.targets'))" />
+    <Error Condition="!Exists('$(NuGetPackageRoot)UltrafastSecp256k1-vc145.4.1.1.7\build\native\UltrafastSecp256k1-vc145.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(NuGetPackageRoot)UltrafastSecp256k1-vc145.4.1.1.7\build\native\UltrafastSecp256k1-vc145.targets'))" />
     <Error Condition="!Exists('$(NuGetPackageRoot)libbitcoin-boost_unit_test_framework-vc145.1.91.0\build\libbitcoin-boost_unit_test_framework-vc145.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(NuGetPackageRoot)libbitcoin-boost_unit_test_framework-vc145.1.91.0\build\libbitcoin-boost_unit_test_framework-vc145.targets'))" />
   </Target>
   <ItemGroup>
@@ -185,4 +187,4 @@
   <ItemGroup>
     <Natvis Include="..\..\debug.natvis" />
   </ItemGroup>
-</Project>
+</Project>
\ No newline at end of file
diff --git a/builds/msvc/vs2026/libbitcoin-node-test/packages.config b/builds/msvc/vs2026/libbitcoin-node-test/packages.config
index e8084722..97aed24f 100644
--- a/builds/msvc/vs2026/libbitcoin-node-test/packages.config
+++ b/builds/msvc/vs2026/libbitcoin-node-test/packages.config
@@ -6,6 +6,7 @@
  |
  -->
 <packages>
+  <package id="UltrafastSecp256k1-vc145" version="4.1.1.7" targetFramework="Native" />
   <package id="libbitcoin-boost" version="1.91.0" targetFramework="Native" />
   <package id="libbitcoin-boost_container-vc145" version="1.91.0" targetFramework="Native" />
   <package id="libbitcoin-boost_iostreams-vc145" version="1.91.0" targetFramework="Native" />
diff --git a/builds/msvc/vs2026/libbitcoin-node/libbitcoin-node.props b/builds/msvc/vs2026/libbitcoin-node/libbitcoin-node.props
index 100424c8..6214b253 100644
--- a/builds/msvc/vs2026/libbitcoin-node/libbitcoin-node.props
+++ b/builds/msvc/vs2026/libbitcoin-node/libbitcoin-node.props
@@ -59,6 +59,7 @@
 
   <Target Name="LinkageInfo" BeforeTargets="PrepareForBuild">
     <Message Text="Linkage-secp256k1 : $(Linkage-secp256k1)" Importance="high"/>
+    <Message Text="Linkage-ultrafast : $(Linkage-ultrafast)" Importance="high"/>
     <Message Text="Linkage-_system   : $(Linkage-libbitcoin-system)" Importance="high"/>
     <Message Text="Linkage-_database : $(Linkage-libbitcoin-database)" Importance="high"/>
     <Message Text="Linkage-_network  : $(Linkage-libbitcoin-network)" Importance="high"/>
diff --git a/builds/msvc/vs2026/libbitcoin-node/libbitcoin-node.vcxproj b/builds/msvc/vs2026/libbitcoin-node/libbitcoin-node.vcxproj
index 65b8aa82..3295d926 100644
--- a/builds/msvc/vs2026/libbitcoin-node/libbitcoin-node.vcxproj
+++ b/builds/msvc/vs2026/libbitcoin-node/libbitcoin-node.vcxproj
@@ -238,6 +238,7 @@
     <Import Project="$(NuGetPackageRoot)libbitcoin-boost_thread-vc145.1.91.0\build\libbitcoin-boost_thread-vc145.targets" Condition="Exists('$(NuGetPackageRoot)libbitcoin-boost_thread-vc145.1.91.0\build\libbitcoin-boost_thread-vc145.targets')" />
     <Import Project="$(NuGetPackageRoot)libbitcoin-boost_url-vc145.1.91.0\build\libbitcoin-boost_url-vc145.targets" Condition="Exists('$(NuGetPackageRoot)libbitcoin-boost_url-vc145.1.91.0\build\libbitcoin-boost_url-vc145.targets')" />
     <Import Project="$(NuGetPackageRoot)secp256k1_vc145.0.6.1.2\build\native\secp256k1_vc145.targets" Condition="Exists('$(NuGetPackageRoot)secp256k1_vc145.0.6.1.2\build\native\secp256k1_vc145.targets')" />
+    <Import Project="$(NuGetPackageRoot)UltrafastSecp256k1-vc145.4.1.1.7\build\native\UltrafastSecp256k1-vc145.targets" Condition="Exists('$(NuGetPackageRoot)UltrafastSecp256k1-vc145.4.1.1.7\build\native\UltrafastSecp256k1-vc145.targets')" />
   </ImportGroup>
   <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
     <PropertyGroup>
@@ -252,8 +253,9 @@
     <Error Condition="!Exists('$(NuGetPackageRoot)libbitcoin-boost_thread-vc145.1.91.0\build\libbitcoin-boost_thread-vc145.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(NuGetPackageRoot)libbitcoin-boost_thread-vc145.1.91.0\build\libbitcoin-boost_thread-vc145.targets'))" />
     <Error Condition="!Exists('$(NuGetPackageRoot)libbitcoin-boost_url-vc145.1.91.0\build\libbitcoin-boost_url-vc145.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(NuGetPackageRoot)libbitcoin-boost_url-vc145.1.91.0\build\libbitcoin-boost_url-vc145.targets'))" />
     <Error Condition="!Exists('$(NuGetPackageRoot)secp256k1_vc145.0.6.1.2\build\native\secp256k1_vc145.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(NuGetPackageRoot)secp256k1_vc145.0.6.1.2\build\native\secp256k1_vc145.targets'))" />
+    <Error Condition="!Exists('$(NuGetPackageRoot)UltrafastSecp256k1-vc145.4.1.1.7\build\native\UltrafastSecp256k1-vc145.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(NuGetPackageRoot)UltrafastSecp256k1-vc145.4.1.1.7\build\native\UltrafastSecp256k1-vc145.targets'))" />
   </Target>
   <ItemGroup>
     <Natvis Include="..\..\debug.natvis" />
   </ItemGroup>
-</Project>
+</Project>
\ No newline at end of file
diff --git a/builds/msvc/vs2026/libbitcoin-node/packages.config b/builds/msvc/vs2026/libbitcoin-node/packages.config
index bf01d5b1..3a09727c 100644
--- a/builds/msvc/vs2026/libbitcoin-node/packages.config
+++ b/builds/msvc/vs2026/libbitcoin-node/packages.config
@@ -6,6 +6,7 @@
  |
  -->
 <packages>
+  <package id="UltrafastSecp256k1-vc145" version="4.1.1.7" targetFramework="Native" />
   <package id="libbitcoin-boost" version="1.91.0" targetFramework="Native" />
   <package id="libbitcoin-boost_container-vc145" version="1.91.0" targetFramework="Native" />
   <package id="libbitcoin-boost_iostreams-vc145" version="1.91.0" targetFramework="Native" />