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 0x45022ee2b0a14cd2a3c069fded3ac8688c8ac1178b2719d1c5aa820ae4e781ed. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1a95c277-0d6b-434a-8e97-57d6c7a74c59.json and https://artists.proofprofile.net/proofs/artist/1a95c277-0d6b-434a-8e97-57d6c7a74c59.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).