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 0xf610de4fc839a574a7a6abd21d5b86bc919cd865ce1a9bf1dce2e9c1cafd6bcb. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a94a4d56-160f-4ffe-8519-6649c06fc7ec.json and https://artists.proofprofile.net/proofs/artist/a94a4d56-160f-4ffe-8519-6649c06fc7ec.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x0341270553cba58ae015a99d4dffee7c7d997bba30d00079981bdfffdff86e8d. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZ5AB1964024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13c5536ff3be56b33bdd7e4bb643a3066eff106d7ee1f59603f90439581bc33. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/QZ5AB1964025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d58b2700a8793c7a69dafef34fd14f5f5fd942e4733ad70d68f39441d3e6fbb. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/BXPR62200013.
Dívidas, Tretas, Muita Perseverança e Pouco Dom
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb5435c38a24cefbd2fb1a004664c936aa625cb5f6d577e26fa921c83e78fed. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BXPR62400001.
Black Mamba (São poucos pra chamar de irmão)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8943b31148c07b86ad1d3a9db3d077f7e9dac671e21402bf2b227d325f060c7e. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/BXPR62200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e03f4b46609dadbd44f6ad719c3040ae3ffe684a0b9cf2e0de17562c855da3. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/BXPR62200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51aae61828f82e55155fa8792ad3c04f9652065270426309b3316095660b30e9. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/BXPR62200019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01daba5da4c3cefd5d6a046251e3c631099c56dbb8a3e973da68991ebaceec7e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BXPR62400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4900b1ceb3812aa54c5b7d1bea6c607dd174a67acc8f62c3cd5e0c87afb9557a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BXPR62500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82754b8374e812ed407afaf9507f1843ffa164e3db45e1fa57f28bcfc2dc91f6. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/BXPR62500003.