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 0xaf7eb792c052668abf15dd0694b6cee27841c87deb0207182d5f9c420fdf4606. 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/d75b596e-c9c4-4bb1-956e-5e4652f61d97.json and https://artists.proofprofile.net/proofs/artist/d75b596e-c9c4-4bb1-956e-5e4652f61d97.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 0x005e4ddacb0cd4416f6be9e1d95f5526f7262c0ad6eb269d8bc85edc6f90d493. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/BRQR22400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c5846677d955d94770688a16aaf32d520d9b91568f1236aaf91ec6d23b24a6e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRQR22400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1812b6762e3b9eedc69dbda5694f047ee593dd9638802637a0964092f25d3594. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRQR22300010.
Só Pro Peão - Fazendinha Sessions #3 (Remix)
Só Pro Peão - Fazendinha Sessions #3 - Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6acee2431a8663e095cbec759e8bbbd7f833d150f209f4c0f28cb54b6fec4a2c. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/BKFZH2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c4069ecc692cdb9f30258dbcb23b6388358bbd3517d6447545a2d7c0707752. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BRQR22300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x322a5b2ed68a96e9e176db467058c481e149e220972f2be889845ac689014d60. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BRQR22300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1b4959fafc6dcfef23f580a185509826e3ca6a2bb934d9ebde0f851b82e8ea. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BXTB12300173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c77069105b60069b8ee0fde1ef21151201cc078a738f03da61e4199dbd7cb15. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRQR22300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93cb98d1edda117a8c0ffeeca7915b9d2f150023d2f45aac291e71727f4a491f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BRQR22200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06414c16d4c25ed2a53bd319e59651a4da7cac116be99b2ffc34270691db406. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BRQR22200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990229a65aa9eb805d80b7ebdcebba058ba3fce36ae25176d4925098f57e0ccf. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BXTB12200155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b848a23cb9f5c073c708456d3b21af61a4dc63874889ddb8f7d72d11187bf3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BX8WE2100035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb3ec8153800da352b212b5bd95b13092a1f34c0f906263ca7fbd1c7bb14102. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZGLM2040089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd30120075fae0a130570a731fd1ea55a703320f429433034bb1272dd1edd1fe. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXBKE1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d726924292726a54ed86fb997904f1d550defda6d249b1cb549533d5bf7de76. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/BX0BA1700012.
Chapéu e Calcinha - Fazendinha Sessions #3 - Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ab5febfc4d3e389ddf9c6003c301e70a1441692f95aaee20530681dbaa309d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BKFZH2300007.
Combo do Perigo - Fazendinha Sessions #3 - Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2c5c63d6c9c34e4fb350042314eabacdccbe9089f7ad61fc8d2bf995fd7659. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BKFZH2300002.
Presentinho de Deus - Fazendinha Sessions #3 - Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e705aeabff179862ac692a284cc09629a82e6ea7c8d7eb85c1dbcf768873f67. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BKFZH2300003.
Mina do Interior - Fazendinha Sessions #3 - Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x828dfae11f1218112c6a741defc0d16a0f90a608be1e60b38b86cc9e0de0e4ae. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BKFZH2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6af41f849965f315594fb62cb4a15d7b860f8fc27c4d08d278616e64dffaec0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BKFZH2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6acee2431a8663e095cbec759e8bbbd7f833d150f209f4c0f28cb54b6fec4a2c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BKFZH2300005.
Do Jeitão Que Ela Faz - Fazendinha Sessions #3 - Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b3fd178237fece8be34a29489d6d5703806fc214dd9779cdaabad7ba4fb4f9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BKFZH2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9b0c8ac5fedafa56209354768814e5cfeb78c200a5d9391765f81fcce7a9f2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BCGTA2500001.