Verify a signed PDF

Use ProofCert to check whether a signed PDF is unchanged, who signed it, and whether its credential is still current.

Select the document

The check starts automatically after the browser security check.

What is checked

The verification result reports each check separately.

Document integrity

Whether the PDF has changed since it was signed.
Issuer identity

The signing organization and its current ProofCert recognition status.
Current status

Whether the credential is valid, expired, or revoked when checked.

Additional evidence

Verification report: Whether the file is a signed ProofCert verification report.
Public timestamp: When available, the Polygon batch containing the credential hash.
File handling: The uploaded PDF is processed for this check and is not retained.

Scope and trust materials

ProofCert evaluates documents against its own trust system. This is separate from recognition through Adobe AATL or another external PDF trust list.

The ProofCert Trust Center publishes the root certificate, verification rules, status definitions, and limits of blockchain timestamp evidence.