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 0x6bdfdeefac2b18742c747a00fc591fd958adc321496bc026a92db9e91c50d896. 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/f6f7be52-7acb-4068-abac-4d3e4c49f446.json and https://artists.proofprofile.net/proofs/artist/f6f7be52-7acb-4068-abac-4d3e4c49f446.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 0x86547a16193bc3f266f03ffebcaca82237dc8601848eabe6013e760e9e22c29a. 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/GBDLM1500034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9bdb08df01bd24f71176376286cd36822837ef3618dee29de685ec2ca50fa7. 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/NLQ7C1600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79ff39e419ba28d5999291cbbb104bab48830fa559e35251b15c12709ec39f1. 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/GBJAJ1102000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b80b4fd576905494403c566c0a9f8db01e8ba0dababe488138912137fdd9bf1. 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/BEN581700292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8a017a9b858f1151f2234546fc79720f6453ebd890d45467f0a2d84f32a286. 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/DEGE91600019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1fc299aaaed99c55648587c25430c42dd8d2a846bcf659b9a40f38df7e7373f. 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/GBJAJ1700246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb49cc1fe1b80294d5e2dec8aa03a47a80cc1346dec73bab97ba8deabad1476f. 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/DEG931591352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0587b99b6f78c3768ba7558d6e73308d696f8782a6e3fed82c32cf9119a5468. 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/GBKQU1711509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9fdc74f660eb88f2bdd68a5d51bd358a60c5e7789c9a3b3ba15526f36b37068. 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/GBJAJ1400181.
Toolroom Radio EP380 - Presented By Mark Knight
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97e678e7be7c123db40d60969edb041f7b933d9e760820d6c27355f50d7a7a6. 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/DEZ651203923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28317222aadba3bd2a8f9864a57c7524106bccfcfeb8c61b361f1be14de796c. 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/FRIDO2211247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a8818e1f770685c5d2e43a408e819a9deda3f4e53a03b16a57d2c22aa39b6e. 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/QZK6J2011734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a416c050db4e6452d09e289151aad90ed082da115a6fad10662a7862ff27e03. 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/QZHN31901498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe499503b91f0cc72182e7607a06adbe6ff98a76a78b2b840fbe6657ed3fbd63. 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/UST8K1672232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7974ba983358b8052be428a6abeca0da210abed68e593d0195682f74cf911392. 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/QM4DW1669481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7cfcef0d718d251c76251d810116c93aeca7bc7f91d3d1453b52bb2eabec3ea. 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/QM4DW1669484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1728d3f9d8615c743aebcf3a60d89ee0db9048b036bf5211c6ae5dcaa33d5872. 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/QM4DW1638329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a735668499386113d5a025392f249d9840b91409d1c245ce7f83d494aa108b9. 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/QM4DW1552592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb7d7ceffded162133b59e0db67df680e3f9c037967a28e709926e9832f1a7c. 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/QM4DW1539447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb24a7bf7d24e7363bb35650a34dfb3f1bf28099581578c5253c51bf2e46eaab. 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/QM4DW1539448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942739fd4f782cedaf7aacf7cb1cd1169170347ac662b4fcf79bc3a9829a05b6. 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/QM4DW1539439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e8a8ef0c1b4bd23ba26487331a68cb60e9255a25e15297e62ac116052b2830. 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/FRIDO2211203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa41867548cda54d0364555be8b42521d30055d937040bfb1aac31cdc29755db. 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/DEP081600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a7aba7ecbf6ef3beddb88187e1facb17fb7de9023b8ffc7b2da21879bc2342d. 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/GBFBC1601488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa200457a807fb067f093ac4e65101baf772a95a212b64ab3d9e8eb76c389a8d8. 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/GBFBC1601489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b350ab6d622b93fda16566feda601d8a6a48940e9e90b6616d5fe5891e6021f. 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/GBFBC1601491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc85b2af280450fa19516fb1dc3426c9097fd3d0e219da2a16008b9086d88d713. 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/DEY470940782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6fa7542787a1c36eba639b71cd90fca94a47b14fa187560c4d60ed46f0caa5. 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/GBKQU2500266.