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 0x6a411daa6ca170fd1398a686aec31e1e8d8de3116f3c2632bf6a99d2a39b5a69. Chain 2 (Bitcoin): anchored in block 953710 (2026-06-14T23:32:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7e94b01f-c9a1-43bc-bc19-de17ec5a1baf.json and https://artists.proofprofile.net/proofs/artist/7e94b01f-c9a1-43bc-bc19-de17ec5a1baf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).