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 0x0c6b3ad991d84bd5c98d40936cd56c9e418a87b117fb9c2244b5f94e9d14a461. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/114d6e4d-495a-4d09-a6c5-c8291c82d35e.json and https://artists.proofprofile.net/proofs/artist/114d6e4d-495a-4d09-a6c5-c8291c82d35e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).