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 entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3c64b907122c2d756d5aa35a669b92150bf091ce4ef9f3bcd298c0be78a7e2. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3a11803c-15e3-44b2-a29d-ec81ab1dd505.json and https://artists.proofprofile.net/proofs/artist/3a11803c-15e3-44b2-a29d-ec81ab1dd505.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).