thumb|right|Common raven of California (Corvus corax clarionensis) in flight A raven is any of several large-bodied passerine bird species in the genus Corvus. These species do not form a single taxon
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 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 0x3cd38c07a89928c65b240f85cd906a515a70e5f9f4b9798b4dcd308d01219fb5. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d21de06c-2606-4eb7-b337-a90bced75642.json and https://artists.proofprofile.net/proofs/artist/d21de06c-2606-4eb7-b337-a90bced75642.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).