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 0x8cdb7d8b40c8ffe444fd043e2708f8c38626be9ae669fb35be003b7b4bc6cff6. 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/9a54b37c-be69-4569-b4a9-b496b9336960.json and https://artists.proofprofile.net/proofs/artist/9a54b37c-be69-4569-b4a9-b496b9336960.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 0xfa76b1873e7bccf2a24e0f6b56a3acee922579c689eb11aa4f5aa00e78190d9d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/JMA750800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e39131f6cc126f9055c1cf22f22a2f069a76f3ef083e983c2ebc9b0ad652151. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/JMA750800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd231c2ba5c6d33d0b3b80cc61479f838942f9eb71f78383126572e3f554440e5. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/JMA750800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f72fdba9d0b3735a8c0eae96b4bfbbe7919abed2e91a99cc91155510661fb47. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/JMA750800015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f1e2d70b5492b2a3b1c05c94bd607e2c381bf98c67e425366242f640296abc. 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/JMA751200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e1890be9db94afc1b41c1065f9b58fa99f059789b1cc94de881e0987fb3a86. 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/JMA751200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6098d36ce309b603f922f12dc96e5e54e5bcb5bbd9839b932720e44c4acb3924. 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/JMA751200003.
If It's Not You (Then Lord It's Nothing)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0cba799cee579bcfdac4b3227e54e1e1f673733654d33964c77365d9ce90f8. 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/JMA751200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4c728beec221153cf35e5e99e96c973ff0def68634b7603998737297e3cf50. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:19:29Z), 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/JMA751200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45cca4549362c9d9bd745dcc119c46be2c5aa6ac0a9c44577e767af20b2db2c5. 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/JMA751200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a2c1fa34b538cabe114d9e9343f0ad75dd902ae2f1adff14e9327f4e002787. 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/JMA751200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb334034adab7b410c0723c38f7a052b54edd208f50cfcb06f2bafb046308cc. 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/JMA751200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c28bc0e008da7ffe4a1e46a3027e2afdeacb84d206f3b20a9da00e4fc412eaf. 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/JMA751200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00eafc05c80ca88427515643bb1422a4f04fe13012c837a6db65006dbecbe77. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/JMA751400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e5c214231f932aa2d4b01b28ffa3929f4392be09db19d2762dc0ab76ccde5a6. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/JMA751700019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e5e61290de615acea9fe89a2100901c6d78b84cd9a6ec079a271464fd4cf29. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/JMA751700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c90172a26a8bb90d766e63fb4ee4e97d5f8b9adf156b90e56a10d0a43c69bc2. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/JMA751700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6faccb73f5d6a869a111f3db4460fb8f88f1007903a182a4c368335d31305b95. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/JMA751700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a05066aaef77c88530efe165312f7e0873bb3b6a148865ba60fff9149e73ee. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/JMA751700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f400318d70d4cb4b4218714abb6277fe6344e9a47590207c767d401cc2ff263. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/JMA751700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9306dc71ed2415957f0616b235dab26ca12464a785f834252e15b27beea83da8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JMA751700012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a06ac9b2de40c6eaffb459ccfdbc924b82907e1f530581b70744b6f4f40c2e7. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/JMA751700016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329b15770301152d8662c5ec883a017aa31e487f66857b984a5ba18df9ecfbaf. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/JMA751800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5f1b0f2d37224c438162f0d02459e4add3c725aadeb02614f6d4b60ab1baa4. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/JMA751700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3817913ddf5b8c4352f57fb781c8d45d2b4a928d4db5d962d5a1cbf564fd2fb. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/JMA752000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e83a34b69cba79e0ff3b86e10d482b74f2ce54f8de9eca4c9433e5908cbaa9d. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/JMA752000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d653b9cabc1ad42543b367c2cfc6fba5d59ff18eda2f6016399ac7bc5059454. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBFRL2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c1269da477804582736afea4dd798dd0944c037d8934882899114ede6fdeef. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JMA752300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcadc107d0ebe8f5f874ef14d6adbf0ddedce7ed15754ec14fc0d57ba6e99e3d7. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/JMA752300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e83a34b69cba79e0ff3b86e10d482b74f2ce54f8de9eca4c9433e5908cbaa9d. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/JMA752000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13034df93f74879036116f49c1a0b786e9b60cba4df30fc0dbf82cfc15ef5667. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T15:40:07Z), 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/JMA752300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd023405f290b26d25794a15fe229f051b36488d45bc7c5026df958755cd0edaa. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/JMA752400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x636bd0bc14e9a7713d141ea6a0d7908fb7c60514cebc8a6519eb4bc5c6210eed. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/JMA752500001.