Verify a proof

Find the deposit proof of a file: its date, its authors and its public register record.

Drop the file here

Choose a file

Your file never leaves your device: only its fingerprint is compared.

  1. 1The original fileThe one that was deposited, with no change at all.
  2. 2Its fingerprintComputed on your device, in a few seconds.
  3. 3The comparisonWith the proofs recorded in the public register.

Got a PDF certificate? Scan its QR code or open its verification link: the result shows straight away.