right|thumb|Playing cards and a baccarat pallet, which is used to deliver cards to players Baccarat or baccara (; ) is a card game. It is now played mainly at casinos, but in the past it was also popu
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 0x5d0f8a55b8525ee6e4df2f7898c72f866d7b95dea651c47d520cf7cf1339e15a. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/76f07e5f-eb16-4f50-b868-5e912ea2042e.json and https://artists.proofprofile.net/proofs/artist/76f07e5f-eb16-4f50-b868-5e912ea2042e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).