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 0x5140aa2fb823331dd10059b2c55b1f4e2f5b92ab0f97afcce8185bada1803e79. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d847e314-b2be-4b0c-97ab-38cd889d1249.json and https://artists.proofprofile.net/proofs/artist/d847e314-b2be-4b0c-97ab-38cd889d1249.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bloquinho dos Criminosos 2.0 (Ao Vivo no Carnaval da Barra 2024)
Bloquinho Dos Criminosos 2.0 - Ao Vivo No Carnaval Da Barra 2024
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 0xd97d222d08ac74c59db83e75e0db208b3e3518ef490e1c0645d9e76e628cea64. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T19:01:38Z), 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/BCRIZ2400079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f3c88ee06e9de39fabe3adf9a29d0703b83c9a5b61b14013287c36f73ff260. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/BCRIZ2401243.