Step-by-step decision procedure for verifying a payment counterparty's Concordium identity credential before settling an

Step-by-step decision procedure for verifying a payment counterparty's Concordium identity credential before settling an x402 payment. Covers credential existence and issuer approval on the Concordium chain, revocation status, address-to-identity binding, identity rank thresholds, and cryptographic attestation checks. Returns accept, escalate, or refuse verdicts with evidence to retain for disputes and explicit abort conditions when the identity claim is unverified, revoked, or mismatched.