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 0x7bb067b25c4a2cbe19b2c2674dae5447ef2ea3fef10ef5efa78d9565f6e74c69. 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/4a5ca6a5-e61a-4167-9f7a-62c4358c946a.json and https://artists.proofprofile.net/proofs/artist/4a5ca6a5-e61a-4167-9f7a-62c4358c946a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).