Every document signed with SignaTrust is anchored to the Solana blockchain and time-stamped by an independent authority — so the proof of signing does not depend on trusting any vendor, including us.
A hash of the final document is written to Solana mainnet — public, fee-paid, and append-only. The record exists independently of SignaTrust.
A qualified RFC 3161 timestamp from an independent authority proves when the document was signed, separate from any clock SignaTrust controls.
Anyone can recompute the document hash and check it against the chain at /verify — without logging in, and without SignaTrust being online.
Documents stay in your own storage. SignaTrust orchestrates signing and then destroys its working copy; the source of truth is your infrastructure plus the public anchor.
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. If the vendor is acquired, goes offline, or loses its keys, the proof goes with it. 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. Verification does not depend on SignaTrust being online.
SignaTrust anchors to Solana mainnet. The anchor is a small, fee-paid, public transaction containing the document hash, so the cost and permanence are predictable and the record is independent of SignaTrust's own systems. The blockchain proves integrity and timing; identity is established separately by the verification tier chosen for the signing (link, one-time passcode, or passkey).
It survives. Most e-signature audit trails live in the vendor's database and are only as durable as the vendor. SignaTrust's proof lives in three places that do not depend on the company: a public Solana anchor, a qualified RFC 3161 timestamp token from an independent authority, and a self-contained evidence bundle you hold. Any one of them can be checked after SignaTrust is gone.
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.