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 0xa6039b3fa0e85b21b63d96a26a883ce337e4b6ec6f0fc5a130536c1e8752d020. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4f8f4c7d-a5bd-47a8-839a-4a180146a1dc.json and https://artists.proofprofile.net/proofs/artist/4f8f4c7d-a5bd-47a8-839a-4a180146a1dc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).