Chain-of-custody license certificate for any digital asset: a SHA-256 content hash bound to issuer, subject, and license terms under an HMAC-SHA-256 signature. Deterministic, portable, and verifiable through the issuer while the current HMAC v1 profile is active — a receipt an agent can carry to record what it licensed, from whom, and on what terms.
| Network | Scheme | Amount | Pay To |
|---|---|---|---|
| Base | exact | $0.25 USDC | 0x40e5...7a7F |