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 0x2b61b042688de384ae3af08c3b3692ed3047e3b7ff9cb7d71e72f0a2b500a949. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/408a89a9-52c6-48ee-8ce6-4f298f49bd76.json and https://artists.proofprofile.net/proofs/artist/408a89a9-52c6-48ee-8ce6-4f298f49bd76.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).