Please note that the actual PDF of the certificate itself is not published to the blockchain, but rather a fingerprint of the PDF, which is enough to validate that the exact document was indeed published by the issuer and timestamped by Bitcoin’s blockchain.

To see if a PDF certificate has been issued on the blockchain, simply drop it on the area.

Original Certificate issued by University of Nicosia

Certificate of accomplishment example

University of Nicosia Certificate with tampered metadata

Example of tamp certificate of Alexis Nicolaou