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 0x3e4c48e5dc8ebab396ba2f145aa9d06b0b59cd1425ce9ffcec5ee1612f3d18d1. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c2cf89e0-f479-4f25-a9af-0f592353ac3b.json and https://artists.proofprofile.net/proofs/artist/c2cf89e0-f479-4f25-a9af-0f592353ac3b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).