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 0x19a7bd890be7a57012dda5f3d3a9c5369c57e513e8894b4c478cb51f515e6004. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c2fb64eb-3fbf-46e3-b53f-422d87f9c175.json and https://artists.proofprofile.net/proofs/artist/c2fb64eb-3fbf-46e3-b53f-422d87f9c175.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).