Marcelo Mendonça de Mattos or simply Marcelo Mattos (born 10 February 1984) is a Brazilian former football defensive midfielder. He is known for his positioning, tight marking of the opposing player
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 0x1c639bfe143e1e9a5d1cb0d0bff592afd95f9669d7f2bd006a8bc67732efa684. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5569415a-4c4d-4d88-af17-7b854625451c.json and https://artists.proofprofile.net/proofs/artist/5569415a-4c4d-4d88-af17-7b854625451c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
O Gosto das Pequenas Vitórias (Como Vencer os Medos Que nos Afligem)
Reaviva o Dom de Deus (Ano Vocacional da Família Paulina)