1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this artist was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6728af294a2a29b6a296f8cf94f03ce0249f05962a585431308fa6b837a2cb54. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ee61f3ff-7be0-4bf2-ac33-e3974f334b33.json and https://artists.proofprofile.net/proofs/artist/ee61f3ff-7be0-4bf2-ac33-e3974f334b33.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).