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 0x2945dbc6f849ef67161c6a6727554c149da91ae353db4c57f6afbb7dd24a9199. 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/4f628a5e-f5ca-48a1-a7de-dd8459b80b8b.json and https://artists.proofprofile.net/proofs/artist/4f628a5e-f5ca-48a1-a7de-dd8459b80b8b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).