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 0xcccfaf2a9bde009859ce1c8fd81283ec3a925a15c1c1302b682bbb0051bbc1b7. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5d96c821-26af-4e96-b6f0-7b373b7d2e86.json and https://artists.proofprofile.net/proofs/artist/5d96c821-26af-4e96-b6f0-7b373b7d2e86.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).