Dirceu Lucas de Abreu Santos (born 25 February 1988), known as Lucas Abreu, is Brazilian footballer who plays for Paraná. Biography Born in Curvelo, Minas Gerais, Lucas started his career at Poços de
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f69f3252b9ae06fc553fc46afdb68e040833f921319714fad28b38674cc5f8c. 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/c2423390-3f1f-4ed2-a3aa-b2f638d99ce0.json and https://artists.proofprofile.net/proofs/artist/c2423390-3f1f-4ed2-a3aa-b2f638d99ce0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).