An application component that validates the real-time status of a health credential (valid, suspended, revoked, expired) at the point of presentation. It queries the credential status mechanism (W3C StatusList2021 or OCSP-equivalent) maintained by the issuer to determine whether the credential remains valid. This is critical for time-sensitive health credentials (e.g., prescriptions with limited validity, temporary access authorisations) where revocation may occur between issuance and presentation.