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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77eb5add55f5e769ca1e22d083e9467da4d6bc6ff7e49ac8618b5600ed611ff5. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a7daf250-af7a-4d57-b8a5-ddbfd523875e.json and https://artists.proofprofile.net/proofs/artist/a7daf250-af7a-4d57-b8a5-ddbfd523875e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Lanchonete do Juninho (Acústico em Angra II)
Não Olhe Assim (Juninho em Campos) [Acústico]
Cada Volta É um Recomeço (Juninho em Campos)
Não Aprendi Dizer Adeus / Nuvem de Lágrimas (Juninho em Campos) [Ao Vivo]
Convite de Casamento / Brincar de Ser Feliz (Juninho em Campos) [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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d320cbc26d922b90c35f649dd59fa3c46bac858feb55139cbf28480e2611519. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BRQTB2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3cc34f0da8c4808ad61e6d586201691ff8f5a067629d68b161834b2326e66f1. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/BRQTB2400007.