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 0x981798c7cacf25e0637587fe573bcd0b8578877ff34cd9947c817228f34a4e0c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d77b4c16-e50a-4500-a9cc-3f1945642032.json and https://artists.proofprofile.net/proofs/artist/d77b4c16-e50a-4500-a9cc-3f1945642032.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8992cc99579bf102fd55f9c60d3c6293e69ed987b82a3bb73d0a48734462476. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:53:07Z), 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/USUS11600174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b8031a013ecd069ff707ff034dc33b1b3a43310125b2e87b327855462f66f9. 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/USUS11700063.
True Love (feat. Laurell) (feat. Laurell)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d220a9f7ffbb30590dd0056fa2cf7ee3f7736d7611c3c30e804253cac14786. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/USUS11800018.
Holding On (feat. Molly Hammar) (feat. Molly Hammar)
It's Not Right (feat. Laura White) [Sondr Remix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe355fe6a93d1ef4a7f5ba7362c34db2cd1f0ad206df5d02480d037b8c30c26e8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USUS12000236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb011cd3b27bfb7a6231566277a1216ccb9efa0cb52c4d2f12b06d360fc1d7877. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USUS12100388.
Takeaway (feat. Lennon Stella) - Sondr Remix
Takeaway (feat. Lennon Stella) [Remixes]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697a43e58a2374430cae0a82c6d5cdb0108d41cb5a7556b2164a94303aa05fe9. 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/USQX91902329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942224dc96b996db39f55bed3f324d0bbce64c0c875af71d8658fd75b9d3c49d. 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/USUS12000410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc912e84380fa8fbd328971e3a1af0e27b63438dfb72bfa99c122d9b2838efd3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USUS11900513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd75680ff379064e581c4966dbc6ae35169e50062e8a27f68ed35e61e151ba2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEUM71723047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b5017e4904e6a199954e8f944aa77f460ed65b221d9b238085e1dce82cbf93. 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/USAT21906108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a8b0a5bd2e1787ef902aab063e2928e54b7c0bbcc1084b8eb27c1d161b7ae3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLF712005920.
Swim (feat. Keelan Donovan) - LIZOT Remix
Swim (feat. Keelan Donovan) [LIZOT Remix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc08d69c642731d34f4b1c7ccdcf93052087c5b7160a8caf8a2e57893ec44f10. 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/USUS12000457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942224dc96b996db39f55bed3f324d0bbce64c0c875af71d8658fd75b9d3c49d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USUS12000410.
Answerphone (feat. Yxng Bane) - Sondr Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9673d963ade9f45ba9566e94fd09bc4b519e597bf75ac6a7876875a8e370c26. 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/GBAYE1800486.
Sorry For Writing All The Songs About You (Remixes)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf60ab488f21acaa8ff5ace0710bf92c3b5f1039ee055497f1c2767809bc4ffd8. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USAT21705351.
LOV (feat. Sondr, Andrew Jackson) - Raie Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e73259df10dfda2c1136f37b5d9eff0da353c641e39fe430ebcbbe27c3c882. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DEUM71802211.
LOV (feat. Sondr, Andrew Jackson) - Raie Remix / Extended Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf040ddd798cdd0a2f3e698f732f9ca2452313ac68a839633025f43bf8946ebd9. 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/DEUM71802212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcafd20cc6759099b707bed3fef2c405aaf3d7c7dee6825f06c8adec431764660. 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/USUS12000693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148ac64829d2a72495aa8878b1f7a216d84e0e6ae46a21c08b1389c6e14ad889. 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/DK4YA2005902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc72427418ea40432973f428fef46d3f31da40eacb5916610ad5120b8b96094. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DEQ322100230.
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
Kontor Sports - Nonstop Powermix, 2020.04
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc9d8a5dc7d5cb306dbbcd417a12b1e678f03981f8e733fe7cb47f7d6f6062f. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DEN062003421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ca007a5f561f61efcab88fbea6741dddc99048e1cb101ebcc6a911a36d22d6. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DEN062003231.