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 0x87e25da80d4b32992af868d5f0eb1e5c11e42e4fc2f5cacc692a1ada869fd913. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b3d3cca8-e0cd-4da8-b205-d23f41e3ffaa.json and https://artists.proofprofile.net/proofs/artist/b3d3cca8-e0cd-4da8-b205-d23f41e3ffaa.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).