Bit-Sign
Document Signing on Bitcoin
Sign documents with blockchain-verified proof. Every signature is permanently recorded on-chain — immutable, instant, and verifiable by anyone.
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Sign documents with a key only you hold.
Confirmation Speed0.2 seconds
Signature StandardBSV Ordinal
Cost per Signature$0.01
Document Signing
Upload any document and sign it with blockchain-verified proof. Every signature is permanent and tamper-proof.
Multi-Party Signing
Send documents to multiple signers with ordered workflows. Track progress and get notified when complete.
Instant Verification
Anyone can verify a signed document with a link. On-chain proof confirms who signed, when, and that nothing changed.