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 0x6041d5df34fee705f50ec7e6d750ba9be9f057797fae33a50cda059a6f072862. 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/c3334436-3e5d-4c4e-ac5b-8a497f91b390.json and https://artists.proofprofile.net/proofs/artist/c3334436-3e5d-4c4e-ac5b-8a497f91b390.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 0x2ee2810bb6d709e7d6495f4f9a036742762e558151f3082ed2243358ceaaf538. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QM9Z91900052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf02208c0d51aa4790808016ef760a406dfd1bbfa9ed94c1c42813b5fedf8c2. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QM9Z91900053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6d39e63a67e48a9cb6085cb010227b7c49428527859bf809e697a889966516. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QM9Z91900054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d27ce3796dc7996c29ee390eaed2b3ac910507fe9fd18816137ed798567bbb7. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QM9Z91900055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecef994f1e052f9358cbbe8af55330bcc3ce103d46663b2f08bfcd13da35d1e3. 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/QM3JE2402516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd816a4a0036b84f6aa0e3c8e0d59d3ef50302cafba4956979ea25c5c0e03c0fb. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QM3JE2402517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dab7a5c55c486c22d4dc5fb06e4512dbae8db7708ab2abff386ebcccbb573d3. 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/QM3JE2402518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31da841c8252c6acdab73d4c29e2ed62ea6e63e610f08dc1a12a8091980f0825. 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/QM3JE2402519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a523a93ad217f56deb3d5da88367a5f872b29dcc2a7af17031bb8614e7d566. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QM3JE2402520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdafa54897416498c35c42ca65f626891835dc7f6fbee9455e83b974e777c364c. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/QM3JE2402521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920b59db2b9170dbfc12b89d77279bb63e0ef6cab7d2a342ec6ba94c0a15a8f1. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QM3JE2402522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4884b86dbe2cc132fded9af4c56b4e26108e54f57247dd81c3fd8f84f7088e44. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QM3JE2302333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3165a3c0b287e200ba807999953a375f91c9a94ccf854e1d43619376d7bab533. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QM3JE2302336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e850f9f5ffb05d7729976e7313aa1410cbb2d05da7e607d11afe663ad6cad1. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QM3JE2001228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38cd079fc665e9df0ad35b4b686cd705a22982310619a4da462a0f1fd6afe5b4. 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/QM3JE2001231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc4f45b848be21fd6cfb5b5642ea619b15a51c6c29c9867ae6b0544b66faa775. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/QM3JE2001234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8006a0ff444ed8bd2a84753d4f8b44f0a48534a638a1bd793dcb03ad0891aa. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QM3JE2001235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10cbeffe3ddebae38afe29172247607e5cc2f825ab635dcbb8a145ea9af1522f. 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/QM3JE2001238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bbc45d93ba16c11472d6d8924aa1c18270a342155e04c9d04fb94d4de7f5969. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QM3JE2001239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e5ec7cdc5a4a5553197d0409445af145835bc981516a5bdc38525a42bdfb92. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QM3JE1901194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4717edb2a46f58461dfc88bcc107bc0faf498eb73e5e83d7622944dc395de4. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QM3JE1901198.
Hear & Now (Live at Bunker Studios 2015)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b442ddb4817b6a24257ee88939cbdf98d34f8c1fd00e239931c96fc7b120be7. 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/QM3JE1800039.
Nick Finzer & Chris Ziemba (Live in New York City, NY)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x611525b19fc290a86bebdb52b4eaaec9c0a89f79b2dea0173a62160d6590d43a. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QM3JE1700001.
Nick Finzer & Chris Ziemba Live in Memphis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e43bb0fb8d0e8b19fa002a0e68e42e304a7e2009a918a541ace790c453f64e. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QM3JE2402524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31da841c8252c6acdab73d4c29e2ed62ea6e63e610f08dc1a12a8091980f0825. 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/QM3JE2402519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecef994f1e052f9358cbbe8af55330bcc3ce103d46663b2f08bfcd13da35d1e3. 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/QM3JE2402516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x122ebdaed09d3dfe47796dc82f235c65b7a2cee25f3a13f3164e451864b163d0. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZ6BJ1803701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x913b7f1f51724717468e4bb28e901e83000e57a1085fad943fa7f966fd5a0a8b. 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/QM9AA1641958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43ef7b5f251a961eba57e134e95176cc794ee4a1b62138502d227c49ecbb44e. 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/QZ6BJ1803703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c797533fc4e0c6019d67e26a33e9bb95c7db80c0c4f6cc75565f56a3d970d0e. 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/USHM21370953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb07a9ef2229db8d025eb95fc24a69522b5fe98417ae8ebab158ff74a89a9374. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZ6BJ1801701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c429288685a934ee3e427beeebb531b259d1765d75e1cc2c9c34c702da59c80. 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/QZ6BJ1700311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1bae0411c4d40568aa78d763ea9c255dd00a152e41a83c2ea63824839b801c3. 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/QZ6BJ1803702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9fd6b35cc72afe3fa3aa38195a4b6814bb6e2ebc4021838af72d9490e64a5c. 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/QZ6BJ1800302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7e1a73897b46af2ca0514ed2890d38ee3f593a77a0c500677b4122689e1d8c. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/QZ6BJ1803705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a166531f9791d06f1fef357c92645d3a104a8b5177549995fcba3432f07f199. 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/QZ6BJ1803704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb43e61892867c155dfa5bb5c3e8432f9769744be35abb90591bea70aa07036f9. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QM9Z91800129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd414008f7da25381c9c4f54a5ddf84fca7195bc0741f326b49e062640b4fb893. 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/QM9Z91800130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c1c5e73395ec869246970f0ad9ba5edd8aadd192d7eac1e956b31d81041d46. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QM3JE1900972.