thumb| Antônio Gonçalves da Silva, popularly known as Patativa do Assaré, (Assaré, 5 March 1909 — 8 July 2002) was a popular Brazilian oral poet, improviser of oral verse, composer, singer and guitar
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 0x4989d230f55b18ba92e8dd0e8a76d94429a75b9d9faf42343e254fbe94a2b1bb. Chain 2 (Bitcoin): anchored in block 954650 (2026-06-21T04:51:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d904643c-3608-4715-b843-7b5a01e15eb8.json and https://artists.proofprofile.net/proofs/artist/d904643c-3608-4715-b843-7b5a01e15eb8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).