thumb|right|250px|Chico César Chico César (born January 26, 1964, in Catolé do Rocha, Paraíba, Brazil) is a Brazilian singer, poet, composer and songwriter. Early years and career Born in Catolé do R
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 0xdca124f811e9f7c18340d46206ba7993ceab4f6c9ed2a194ad8f0fd9a6f8ecc0. Chain 2 (Bitcoin): anchored in block 953877 (2026-06-16T02:39:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/04c462c1-9db7-45a8-962c-ea55d397991d.json and https://artists.proofprofile.net/proofs/artist/04c462c1-9db7-45a8-962c-ea55d397991d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).