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 0x8a4f4fd1d796c91c92dd02958d7de8416f939c9e7fe8cd85eed04452e43956e8. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/131d0b5f-3767-47c9-bb1c-9865b546fb7e.json and https://artists.proofprofile.net/proofs/artist/131d0b5f-3767-47c9-bb1c-9865b546fb7e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).