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 0x570a3e00d022a0a3172ed2775b269d7ca82c0e29dc72b1bbac58f54ba254f1f8. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b3c5ba42-5ea5-44ab-963b-fc3dce7fa68d.json and https://artists.proofprofile.net/proofs/artist/b3c5ba42-5ea5-44ab-963b-fc3dce7fa68d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).