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 0x70d357b7c202484e96331dc0b3e06c89a248aedf8945ccc2faaaa91a78dbbfd6. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dab1f66d-9c66-49be-883e-a8936768c49e.json and https://artists.proofprofile.net/proofs/artist/dab1f66d-9c66-49be-883e-a8936768c49e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Samba no Fio da Navalha ( Maria Navalha )
Nunca vi Malandro Chorar ( Ponto de Zé )
No cemitério ao lado de uma tumba ( Demanda )
A noite e linda a madrugada e um brinquedo ( Zé )
Cemitério é Praça Linda ( Maria Padilha )
Foi você quem falou ( Lei da inquisição )
Vou contar uma Breve História ( M Padilha )
Mais ele e um Quimbandeiro ( Ponto Exu Tiriri )
E Melhor um Tapa na Cara ( Ponto de demanda )
O Zé quando vier de lagoa ( Ponto de Zé )
Ô Zé quando vier da lagoa ( Ponde de Ze )
Pegaram Zé Pelintra lá no morro ( Ponto de Zé )