Verify the authenticity of a document
Upload a file to find out whether it has been sealed in a Certyneo evidential vault, and when. Its fingerprint is calculated in your browser: the document itself is never transmitted.
No file upload: only its SHA-256 fingerprint, a one-way identifier, is used for verification.
How it works
Local fingerprint
Your browser calculates the SHA-256 fingerprint of the file. The content never leaves your device.
Comparison with vault
The fingerprint is compared with documents sealed in the Certyneo evidence-grade digital vault.
Proof of date
If a match exists, we indicate the earliest sealing date, reliably timestamped.
Doubt about the integrity of your documents?
The Certyneo digital vault seals each document, timestamps it and preserves it in unalterable WORM mode, with an opposable deposit certificate.