Send a counterproof link, match the file hash locally, and log every signature on-chain. Simple, tamper-evident approvals for any team.
Every counter-signature is verified locally, recorded on-chain, and paired with the original proof automatically.
Create the original Solana proof from Pro. The document hash becomes the source of truth for every future signature.
Generate unique signing links or QR codes from the dashboard. Recipients review the original proof hash before they sign.
Parties verify the file hash locally, sign with their Ed25519 keys, and mint a linked Solana proof. No account required.
Mutual signing keeps the original document unchanged while tracking every participant across the lifecycle of the agreement.
Files are verified client-side (SHA-256). If bytes change, signing is blocked.
Every counter-signature lands in the audit table with timestamp and transaction link.
Pro accounts instantly reflect new signatures with status badges and history.
Timestamp signatures without altering the negotiated file.
Route documents through compliance with clear audit history.
Notaries publish via Pro, clients counter-sign via link.
Prove creation and acceptance of asset delivery.
Unlimited counter-signers, blockchain receipts, and dashboard tracking.
Ready in under 2 minutes • No card needed
Keep your contracts immutable, provable, and instantly verifiable by every party.