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 0x07185988862625817347a3ad2fa8f93b99425313821f4c8c52d1ad664043ca1d. 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/171bbd3d-4ed0-4129-9700-76945b1da70f.json and https://artists.proofprofile.net/proofs/artist/171bbd3d-4ed0-4129-9700-76945b1da70f.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 0x2fa1d265f577cf8be16d764c2386ea093deaafbbf886c98f57174da05ea3d35c. 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/QM4TW1729422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab2a05395f5436e7f6564b5bcc634715a7ee6c36c1c1f66229895b7970852c2. 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/QM4TW1729426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1fdb7e6be90fb3b8c2d801625e2e43b4d2087154405293a1a15072337c8998. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QM4TW1729428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x333d38f39f6c7444b612ded138b922eef64e07beae5c0b944cfbcd3862f96f45. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QM4TW1729429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2256b6bbbcb4dadac067d5fcf34c982eaf6142523fe6637666076ec2b73b7c. 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/QM4TW1729430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28690f6d626a755c6cb47b13b933011691f2036e4f0baa12f8083cd92e290f8. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/QM4TW1729432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7063dc32267206fcb38d01ed783c08b827073ed471cb29a79650257c68e93d. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/QM4TW1729433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5494605314457546c19ac2981631d761d1487d31aa21c6525e85b00afcacaa19. 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/QM4TW1729434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8995e70e62581d078950159182eaac0768c6dad364a8d98f5a454fc7d0577df4. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USCGJ1599084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f344c79fa0c7e7533e1a41be0b8d84a5c3a276d25fa4dd202b14f922281ee1. 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/USCGJ1599085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d13d057801829276b237d54cb16049fa14701848b4fd0e4ddd070364aa76740. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USCGJ1599086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5789fdfa7752f93e0dea780d998102d3f38dfddf6c72372c8e2e2ff2700e03e0. 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/USCGJ1599087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd297b1b19f1dbf26bd81a4df977c2c61200d562a444359cb5f122737acc390. 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/USCGJ1599088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa647eb812413c721304b038fafe239ede1828709e49982ee0506505ff026d97f. 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/USCGJ1599089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2cd680f5f45e777d9fcc89127f4a258a09fbba45a2e331867a4410deeacb19. 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/USCGJ1599090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13c4a0cb3c086f3cc030b14d095038c03871afe036ec746271c6322da203040. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/USCGJ1599091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca3daf05af717753a3bdfe457aeba7bcb1a13fb370cebf5155b16444ae77594. 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/USCGJ1599092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8593f94f2826ca2bd6e5139a11992a38aeb2ad128fd377dc54f9b3f01b86614f. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/USCGJ1599093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380b07611d1fd3129ca6ad7e5c9f7bca8e84d5fbc577321f5148f655f986484d. 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/USCGJ1599094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc57a0ae8511d05bc4a783b2c62b35b54c6869ef03d49b749c7120bf9c9347e57. 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/USCGJ1599095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc5693c90c8cf5e4ec388d84f75a5a7071663c5548e8271ca637ba3c3a19ca4. 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/USCGJ1599096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe57ab2aae8d2342a141095a145e3b329ac7ba79c93604f41c58c98d0913659ae. 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/USCGJ1599098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709e87d3697b3e732d2fcce7d871a166dff34fe19c8e37f55a9d9e41e2ccae0c. 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/USCGJ1599099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f54d6ab3aabd4ce3e7a3238079c506236138df781f5b1cd6778f8f034b1343. 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/USCGJ1599101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f8badcbf2cedeb6f19d46b0ba8461b528da9e68d8cc20b726ef404d9a170fae. 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/USCGJ1599102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09e94e6d44d8d756b53479144abb63e929200716d62f17b5326c47bbaaf68a8. 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/USCGJ1599103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b1caecdc27db26b03e11e03981a137d995a4fa95d8d4a0aa1de881a6d6774df. 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/USCGJ1599104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3995f4256019bf23a92f5cc51eb6b5ff5d284d5ea2b46b0d573d43d01315ac99. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USCGJ1599108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123124961c17777d8fdc728bfcc028d9562efb7b8768855197fac3a369d6cd5d. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/USCGJ1599109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe721827254f3d73dfbf4b917647fcc2c19143012a3d7816c7129fde8751cad73. 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/ZZOPM2223015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf53dcaec1179708d59c1f1ea6da897bbb755984321de01b3551d1e4762f3d8. 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/USHM92130720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcacadd2a986e06dddb883bd7804e5d0e4efe69e17ed43f1c5a9980f9df6bc465. 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/USA2P2133900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ccf0e5fd310aa70fe2f36f7ebd2e5210e1838be0801c229dff41be2ac77488a. 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/USA2P2106231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561f8f342cb96a9c4fa8055df79a8807e5bfbf524e39086abc28f715d5a41783. 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/TCAEW2055603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e95b452b38813ca0ac14b30aa2c07a6eb52d8f54cd55951547fe54987ce3c0. 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/MXF012000028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e2071a8b35eea20ce27c5cc5d8b64b0a5bafa710c311a5200d53a1c267d7352. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZGLM2006157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772afcd93f52f4d43681256ba3685b64cca65d59523232eaa8c361d081fd9b81. 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/USA2P2502752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ecf85952f6d011e9636756d4c3d67a378dd5c027a326783e33a8cf76edc89b. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/TCAFX2194220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802e8d92e0198ac446bab1723d6f5b4f45f2109a97ee3113c0699045cc537652. 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/USA2P2462646.