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 0x03b6e925aacd6b6ce1f2e05136e3ec9e84f05086ab09dc7ed999db1b24c31e60. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/26d414ad-1a11-4f2f-a559-d0fc754f5b0b.json and https://artists.proofprofile.net/proofs/artist/26d414ad-1a11-4f2f-a559-d0fc754f5b0b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).