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 0x2aa008659a8868042be1a76a3a444cd3f3a1bc75fdc8c03b1f96812a9e41d22e. 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/bb87dcc4-de40-4d3a-bb42-21b3c3a0aa09.json and https://artists.proofprofile.net/proofs/artist/bb87dcc4-de40-4d3a-bb42-21b3c3a0aa09.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 0x85aca51ba63bd274ef1c188e387aa70a83ee0afe7132a29658eded60345462af. 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/BX2LP2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9638fd120beb8cff0ade667f74e515830d56369df0433aa9b96b982b38d60008. 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/BX8E12000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e31ffea35f9c4fba5de743107715619934d05d23bc0d579e4d1670c5d7f3d48. 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/BX6VO2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1604486db4d0314597a08f3298fdd64bf2a8da09f01b02b83b7d2b9d4dced7d. 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/BXBKE2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716726b5c19d166277be6590119f27bf9f856d86ce1d73e00eda2f82c595eb51. 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/BXBKE2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6815cc5e35ea72a9bde307930e58d93e7db3c35144b195456d3a867eb27de484. 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/BXHBP1900626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf221f8b205a74e3545966a0db9d05c4f45a4c6d5c337f63a63356ce27a39500d. 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/BXBKE2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67214c42e0fa084a00ea6d589ae51ed329b8948539f184702bd9704787c4ee1c. 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/BXTMX1900021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x574cc1a9fc144dcfbcc5201c86628fa4642c375705375d4fb337d338f0ab9d59. 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/BXBKE1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78095b770c7fe17fbb1d8e395959552985fd3407eaeb8121a753f24d7bd56911. 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/BR3T81800057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc64674b576b514c15cbe15f955d17e8b73b5589297aa2d57200482ab327601. 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/DEBY71800430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5fa34790a21b013c2c85197e974cdc63ff04f1c54cb6480b7d0948c438c1ed. 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/BR3T81800043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dbd715e81d588d80a44ce93a8b5854e397a67c799f1473d6a64e0b4ded41623. 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/BR3T81800041.
Brisa - Monkeyz (BR) e Thiago Mathias Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22709bb4f8a9012e9e6f7c86c8db3b90bc71e1b35f91088846a7ddb7478b7505. 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/BR3T81800034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe3a398f29465907746d27fb7422614571eab03f90eb6d3781e332524806696c. 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/BXLVT1800003.