Bitcoin signature tool
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Bitcoin Signature Tool

JavaScript Client-Side Bitcoin Signing and Verification Tool

This tool is designed to help you create compact Bitcoin signatures for use in your contracts. It was created for Rein, the decentralized professional services market.


  • Sign and verify documents containing nested Bitcoin signatures. This allows multi-step and multi-party signing and verification to be applied to a document.
  • Simplified web interface
  • Can be kept offline, stored on media containing sensitive private keys