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 0x045eb1e83ff2473460012cb6eda5193a9416785526e3bee27964850add1d27b3. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/95c76540-3dcf-473a-8921-40be6c7c6b9f.json and https://artists.proofprofile.net/proofs/artist/95c76540-3dcf-473a-8921-40be6c7c6b9f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
De Bar em Bar: Pão de Mel / Coração Está em Pedaços (Ao Vivo)
De Bar em Bar: Só da Você na Minha Vida / Declaração de Amor, Vol. 2 (Ao Vivo)
De Bar em Bar: Meu Segredo / Vida Vazia, Vol. 3 (Ao Vivo)
De Bar em Bar: Ultimo Adeus / É Disso Que o Velho Gosta, Vol. 4 (Ao Vivo)
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp 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 0xbf94260aaa6eb8167446365f31f45a6fcf3f11b72a604d3e580ee73692fb46d7. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BXIFU2300001.
De Bar em Bar: Roupa de Lua de Mel / Do Outro Lado da Cidade, Vol. 5 (Ao Vivo)