A hash of the final document is written to Solana mainnet — public, fee-paid, and append-only.
The public Solana anchor establishes that the signed document existed no later than its block time — a bound anyone can check, independent of any clock SignaTrust controls.
Anyone can recompute the document hash and check it against the chain at /verify — without logging in or creating an account.
SignaTrust stores your documents while they're being signed and keeps an evidence record for every envelope. Connect your own cloud storage and completed, signed PDFs are exported there automatically.
Most e-signature audit trails live in the vendor's database, signed by the vendor's keys, and are verified by asking the vendor whether a signing happened. A blockchain anchor moves the integrity evidence somewhere no single company controls: a public, append-only ledger. The anchor proves the document is unaltered and when it was signed. Who signed is established separately by the identity tier — an emailed link, a one-time passcode, or a passkey — so the strength of attribution is something you choose per document.
A blockchain e-signature is an ordinary electronic signature with one addition: a cryptographic fingerprint (hash) of the signed document is recorded on a public blockchain. Because the ledger is public and append-only, the record cannot be quietly changed or deleted. Anyone holding the document can recompute its hash, look it up on-chain, and confirm the file is unaltered since signing — without trusting the vendor that produced it.
Open the public verification page at signatrust.io/verify and upload the signed PDF or its evidence bundle. The check recomputes the document hash, finds the matching Solana transaction, and confirms the timestamp and audit chain — all without a login. You can also read the transaction directly on a public Solana explorer.
SignaTrust anchors to Solana mainnet. The blockchain proves integrity and timing; identity is established separately by the verification tier chosen for the signing (link, one-time passcode, or passkey).
Yes, on the same terms as any electronic signature: under the ESIGN Act and UETA in the United States and eIDAS in the EU, provided the signer intended to sign, consented to electronic records, the signature is attributable to them, and the record is retained. The blockchain anchor does not change the legal basis — it strengthens the integrity evidence by making tampering detectable by anyone, not just the vendor.
Free for 10 envelopes a month — flat-fee tiers, never per-seat. Or verify an existing signed document first.