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 0xd95e72fdf70af82dc7df7bdafdc9f446f346a71c9f7741b319b8f4d499eb219a. Chain 2 (Bitcoin): anchored in block 953730 (2026-06-15T02:47:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/94a2a660-5c9d-448a-a35e-f511fcf70cb5.json and https://artists.proofprofile.net/proofs/artist/94a2a660-5c9d-448a-a35e-f511fcf70cb5.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 0x70f954aa4cb170ba1194552e67e2904f1c772eaf3499da40f1fcec89be01189d. 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/BR9I22200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27b8d2e12ea8b8b6462180c22e469ad64b14281a775d1f40ad1e0a4fdf237e6. 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/BR9I22300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0e1790b0eae4358b01265de0a2e461d3662f0830ed82509b4a5d09ce1d444f. 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/BR9I22300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021c2a3b76b6ab72dba066ed63e8a600070c037a397b2b254a2d1a0e02cfc075. 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/BR9I22300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba196f34c2bbd98cca86d97a3f46027bd1fc0999e75234298508bc489b24eb58. 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/BR9I22300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c0553d949966ee6290d1b0d447e0650f656e85a7f8a5515ba748ac59fd6c68e. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/BX4M52200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656718a3c641c9b1886f5580ac30f728b0f2156c4d2ff9d54493e5c90508ea8c. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/BX4M52200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac52b14200d05a170c30f4ec9d1f301208de6eaf3bc3ef418488fd0c9abcb29. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/BX4M52200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0453974738ff95e5cc61bae4d79276572e44bd3c93e0f2cb2772a3201d67342c. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/BX4M52200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde69a6d02c560e33e16122b11e385949f828dab5e4413de920d0087cdccc298. 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/BX4M52200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84eb41abc41c765b071b0aca708d29d16f1bf36425985d4b1e7b4a02c95406ca. 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/BX4M52200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe343ac15d04f89f044757f515d9db27b7ec76e2c0f428a39bced8d57f72f4f6b. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/BRTRB2306320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb06488f97b027e83d6ff1f33b70ed3fe0ec361a5002ec540bd8857dfe29f59. 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/QZMHK2254218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd55e381bd04cb20c8a767faa6f15567474138864f85ac491218059b9b8c7246e. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/QZS652245167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5089c774b4280f305ce5c13c1ac6c5676396eecbb9c0b1b07e07501f32691c. 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/BX4M52100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29722d766b4544a538b9eff8c329536292b0d8f381d4692d868a1a08ae971c2c. 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/BRNFS2000086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef0f640b3381d8f0df17583bd3e720b824479b330e24488529319ac61508676. 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/BRNFS2000087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb98c99c9c99c092244fb8e88a6394ea46a1ea2b19caeeb62502ef1132bbb8c45. 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/BRNFS2000088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3342c9e0771b3ed8ca0c26a11cd9208fadd2c181e78077f90fe7d3573a4f7a6a. 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/BRNFS2000089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f47097f00dda9dc2e2923d9b4a7e4de71556090340511570b2b12b93e1139e. 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/BCDCN2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b9e57be4637e4e61bbf1a0b75f237c06c74d64082b755c9588684375bc12e0. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/BCDCN2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278dca9a93610c3abdcde8e28a9466c4caece1576867530b094e08773d91b751. 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/QZNJV2453680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52fe01391d3059dd8ada29708098be069f9dd1047a1a860f28f812e84773f840. Chain 2 (Bitcoin): anchored in block 960230 (2026-07-30T08:32:18Z), 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/BCDCN2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d280a8caf6371b789755b3cbd003a61c0fe376eecefb2d4db2f16cf6763a73. 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/BCDCN2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38eaf82816e467fc5e90db33b0b50710a015b1eda7f907878dd102e1423e6ca3. 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/BCDCN2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0a69e9ad5181e9877c6079ccde3351f2d5d8d1b74cf32f198625c0f9f7122c4. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/BCDCN2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52218ff488ede3416a167594b911793380a68112ae8cb869b1e8ea7d5b1b9f8f. 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/BX4M52100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0c9fa722cc805425249b4f7c9e2f32292124c80c820d3f071e150ac9414568. 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/BX4M52400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71fc566c1c3b03c33ec97f74eeef2dc7f1a31b285e1d577929fdf082582318a. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/BXL732400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb1caf6d6e86645414c62c9dd4cb576ef13c21aa15214e2b1249a0c06fc4ffb. 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/BXL732200045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5089c774b4280f305ce5c13c1ac6c5676396eecbb9c0b1b07e07501f32691c. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/BX4M52100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e22c58e1d4c8e9f69f003f460b4a0008482e11f5ba695f22b62ac2c9633578e. 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/BXYEP2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03171b07ec777f4576224935ed9945541fba973d19b14658184d1b42662c3446. 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/BXYEP2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bca157d2eecd8ce219d7ded86fd3b1b8ec8c411824ad7b4076400eb3c40c41e. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/BXYEP2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1846227c705e5eb92d388b7ded39ec950437d1a51f17ec4add5d0a94ace0431. 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/BXYEP2400014.