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 0xda2089ff63ecc8befbaf23e32de43e79e61c76722ec49db8b3d60c2ca5baeab0. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4cf4e69d-4e60-44ce-a995-cf5a1c6b4427.json and https://artists.proofprofile.net/proofs/artist/4cf4e69d-4e60-44ce-a995-cf5a1c6b4427.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).