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 0xe28bd359de6204ee0767ea2c2cbb2277b053ba8c93f89ae55ec57ac0d40f198a. 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/e42b03a0-2242-4a54-a784-bc0e706adaa3.json and https://artists.proofprofile.net/proofs/artist/e42b03a0-2242-4a54-a784-bc0e706adaa3.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 0x28e848a8c2e9b1b7fa0a69d7ba63a4b35178160cb47667e381d40ad3d8af1908. 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/USHM20953040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bdeca7f8b73b9ed423ee0e914a563b40ccc917c1631b9993683969f162f3e4e. 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/USHM20953041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa406feb60f9c9194b27a246cfe184d3fba7b0c268cffa815c519c9f1f58c51af. 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/USHM20953042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x714d4913e01db9fd25c1a1be3a7592eae0332bf20ad624f95009222d45368185. 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/USHM20953043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ea0675458d3043b85be4a7e0a8fa7a440d82c16bbba977170552bb7a39b648. 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/USHM20953044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a71caa9182feb832a9a7139a5de9c9c9ddcb1662841636d0366705e1f29748. 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/USHM20953045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35024c867dfd9100ed95848aff5366c46905b254c1c59a97ede611968415c63f. 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/USHM20953046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa11be1a038497b2d6df81e8b4d9908586f52592d5b4c9550d190d3609540369a. 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/USHM20953047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b9f5fe31b45a7267eb3c26a4b9c5088db519254bb416242fb8692ece68c407. 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/USHM20953048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26bf9ef90c9840f0fa5445d831fa5c1af5d4e083ce3c78de0aea07a90591adc6. 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/USHM20953049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823961bab28547548fb6839bcd3415dda25191043ef55330a74489dda47ab0e0. 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/USHM20953050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb83f531676a6b258420e1ffb75d656398337651066595162a70d4f59291fce2. 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/USHM20953051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40331fb4c5bf448db48e738cc0468f4f9e88553a7972a921f3863c3202ed7e46. 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/USHM20953052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x087f92d186126847acd0ba5d22b6ee7a06820370a506e7b4265f8164a8dc784e. 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/USHM20953053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0857e6e3cdfbc250ce1adb6e307f2a8eb769665b31a84f4e100770031a5c0f17. 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/USHM90887584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffaa22f33933b2ff6ae727a2a7f46ab5377489b593622e3d1f788fffe2a6e7b1. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/USHM90887585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b63b0596ee429af6021888a499b40da0195219792f613f09cf44b877755d0f. 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/USHM90887586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417adfd361da9b72eb822d04a6d61d9d1161758689af1d026784290d9b6bea42. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/USHM90887587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9184b858797a807d3cfc48697891de2836b180e359a29911608976110f54d83e. 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/USHM90887588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2346655756254bcc861072b346386e20343d97566e812eb06174562df1caa91a. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USHM90887589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25aa3fa104d3b7ef85d62cafadeb679c1d9d292136fe37721241e0c27536004. 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/USHM90887590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb57b4be750288187611ae207b51743f8ad21740a823a3f000df6bd9e2ca6ea84. 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/USHM90887591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe01f8f059cbaa9122d65a5dfcaa29c7ccd18dad568be31924a8047fe56111bf5. 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/USHM90887653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7b1da9db8640f063d250033630c2ef67e293fc746dbeca1c7bc38a33c5db7a. 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/USHM90887654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc361bd5a9e334dfbe646c9b8659a9c02aa92da19c8d4973244695a883c4199f7. 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/USHM90887655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee9f83149905a8bcd11132bb1fb52f82db6b30f737f048ee2731a81360ea67f. 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/USHM90887656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbfe764dd4c9e259fcd0351a8c929a28ad1ded93ae0d2eba8527f8b47fd6400e. 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/USHM90887657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e361ee2eafeacbb8daa668e8f0bc0867c7600458846d45dac3dca283c86b39. 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/USHM90868014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaafbc8f0029d12960b47f119cd630dfdaeffee249917f61e7844ca87bd93bde7. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/USHM90868015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d97a2af2c4cdd13f88d3e1a516c0173d8d05c14dbef31452981d7cff6dba2aa. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/USHM90868016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50cabd3a91a34213b3322d76786f866b070b60bed86d2279036db1fe7253b41. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USHM90868017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c5b9ec8a4f428345b2fb135a888a2df450f87875526ee6e6f0ed2f5916a0d6. 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/USHM90868018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77dc6d8b1afeca85d27b2c3db8cd92d84c80b34aa8cca339fd9d561b9f735ae8. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/USHM90868019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x503c75029f90a36dbf2c9fdc11b4c3c9a34c2d733453e9a207c04f1a703da288. 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/USHM90868020.