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 0x674eeb7d2c95d12b13e7ae1048ff8d092d327799eb176244d80f6f7adc6015f6. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c82f3dd3-2ead-4829-afa0-76ce8a86f2a1.json and https://artists.proofprofile.net/proofs/artist/c82f3dd3-2ead-4829-afa0-76ce8a86f2a1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).