Free blockchain document verification tool Is this the file
that was signed?
Verify any LedgerSign document in three checks, without an account and without trusting us. Your file never leaves your browser; the only network requests go to Hedera's public mirror node.
1. Fingerprint the PDF
The SHA-256 hash is computed in your browser. The file is not uploaded anywhere.
2. Compare with the Certificate of Completion
Paste the 64-character hash printed on page 1 of the certificate.
3. Read the anchor from the Hedera ledger
Paste the transaction id from the certificate. The tool asks Hedera's public mirror node for the anchor message and compares the hash inside it.
Prefer a terminal? shasum -a 256 document.pdf on macOS or Linux, or Get-FileHash document.pdf in PowerShell, prints the same fingerprint. The step-by-step guide walks through every check.
What do the three checks prove?
Together they show that the file in your hands is, byte for byte, the file that completed signing, and that the record of it lives on a ledger LedgerSign cannot edit.
Hash the file
SHA-256 turns the PDF into a 64-character fingerprint. Change one byte and the fingerprint changes completely. The tool computes it locally with WebCrypto.
Compare with the certificate
Every LedgerSign Certificate of Completion prints the hash of the signed PDF on page 1. If your file produces the same hash, it is the same file.
Read the ledger
The certificate also carries a Hedera transaction id. The anchor message behind it holds the same hash, recorded by the network at completion time.
What verification does not prove
A matching hash proves integrity: the document has not changed since the anchor was written. It does not, by itself, prove who signed. Signer identity rests on the consent record and the audit trail, which capture email, timestamp, IP address, and browser for every action. The security page explains how the two layers fit together.
Anchors are messages on the Hedera Consensus Service. Any explorer, including HashScan, shows the same record this tool reads.
Want documents that
pass this check?
Every document completed on a Business plan or above is anchored automatically. Start on the free plan and upgrade when you need the proof layer.
No credit card required · Free plan includes 5 documents to try · Cancel anytime
Page updated September 13, 2026