thumb | right | Captain of a ship during a U.S. Fish and Wildlife Service mission Captain is a title, an appellative for the commanding officer of a military unit; the supreme leader or highest rank
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 0xc5c1b4db729744523ffa99ccb0f43fc5f7f90d9dab5967f6bdf3ba4fa5c7e977. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2d03a199-34a6-4e46-a845-92f967055294.json and https://artists.proofprofile.net/proofs/artist/2d03a199-34a6-4e46-a845-92f967055294.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).