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 0x81875bc4eb148b006f4366c1ca53e618bb65bf46127ff2648e2d61f26c6e5a14. Chain 2 (Bitcoin): anchored in block 953616 (2026-06-14T08:58:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1b51dea3-b57c-46f1-bc75-56d764cbaa87.json and https://artists.proofprofile.net/proofs/artist/1b51dea3-b57c-46f1-bc75-56d764cbaa87.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).