ProofCert Trust Center

Verification model

ProofCert evaluates four separate forms of evidence. A document should be treated according to the complete result, not a single check in isolation.

Document integrity

The signed PDF hash and embedded digital signature are checked for changes made after signing.

Issuer identity

The signing certificate is checked against the ProofCert certificate authority and the issuer's current recognition status.

Credential status

The live ProofCert record determines whether the credential remains valid, has expired, or has been revoked.

Public timestamp

Where present, a Polygon Merkle proof shows that a credential hash was included in a publicly timestamped batch.

ProofCert root certificate

The public root certificate is the trust anchor used by ProofCert to validate organization signing certificates.

Subject

CN=ProofCert Credential Authority,O=ProofCert.org

Issuer

CN=ProofCert Credential Authority,O=ProofCert.org

SHA-256 fingerprint

95:56:E6:15:89:24:B9:DA:99:C5:EC:C3:9B:79:3E:BD:7A:F7:C2:24:5D:F8:C7:7C:C9:84:01:8D:B2:8B:14:8E

Serial number

580BA3B8DD7C26A779FD11B2F0113759DD81BF81

Valid from

2026-08-17 08:59:01 UTC

Valid until

2036-08-14 09:04:01 UTC

Issuer and credential status

Verified issuer

The organization has been reviewed by ProofCert and is currently permitted to sign ProofCert credentials.

Suspended issuer

The organization is not currently permitted to sign. Existing credentials must be interpreted using their live status.

Revoked credential

The issuing organization has withdrawn the credential. The signed file remains identifiable but is no longer current.

Expired credential

The expiry time recorded in the signed credential has passed.

Scope of trust

ProofCert verification is authoritative within the ProofCert credential trust framework. It evaluates document integrity, organization signing certificates, issuer standing, and live credential status against ProofCert's published controls.

Recognition shown by third-party PDF readers is governed by their own trust programs, including the Adobe Approved Trust List (AATL) and European Union Trusted List (EUTL), and may therefore differ from a live ProofCert result.

Polygon anchoring adds independently auditable timestamp evidence for a batch Merkle root. ProofCert's live issuer, revocation, and expiry checks remain the authoritative source for current credential status.

Documents submitted for public verification are processed for the check and are not retained.