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 0x6c146067e052c06d60d161c9fe72af2e75e033efb7a32475087f5ad535b2a8e2. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7154e3c7-197f-4a6f-ba46-9b3ac1e840e3.json and https://artists.proofprofile.net/proofs/artist/7154e3c7-197f-4a6f-ba46-9b3ac1e840e3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).