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 0x9d5c8cc2df3f61a9fc71c2d2d223804dbdd63752bc46f3a2fb936b1fccf62400. 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/14502b9d-94c7-4ddc-a335-5a9bef55d4d7.json and https://artists.proofprofile.net/proofs/artist/14502b9d-94c7-4ddc-a335-5a9bef55d4d7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).