Please note that the actual PDF of the document 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. The PDF should contain that same “fingerprint” within it, as a self-contained and self-verifiable digital document.

To see if a PDF document has been issued on the blockchain, simply drop it in the area indicated above.

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