Carlos Alberto Silva Lima (born 20 September 1983), commonly known as Calú, is a Cape Verdean former professional footballer who played as a midfielder. Club career Calú began his career in Cape Ver
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 0x3b64a30a78c8fdbb3d269de20e4d313a823b33e34d5c235c3279cd4246e7d6a9. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eadd25d0-720a-4d98-bef8-0480e223c81e.json and https://artists.proofprofile.net/proofs/artist/eadd25d0-720a-4d98-bef8-0480e223c81e.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Encontro de Poetas (Música Sertaneja Raiz)