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 0xfc802e25f632272c9b84bac99e69f5776f54053f3cc84e9fe0fac3025e9f59c1. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3da25d3c-1a6f-494d-8101-6269f2b2d1e5.json and https://artists.proofprofile.net/proofs/artist/3da25d3c-1a6f-494d-8101-6269f2b2d1e5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).