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 entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeca0c25f3d5384bb6d037f22c34f6bf12ba57c74d7737e8aaf4ef29cb77a9e1e. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/12604c84-e66c-4b4e-85e2-c75607bc0fb8.json and https://artists.proofprofile.net/proofs/artist/12604c84-e66c-4b4e-85e2-c75607bc0fb8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).