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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98bd1f22322b70c780529307bdcc93d9199997ff78a2a4ec9f75bd2623dfd91e. 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/11ec0434-9458-4ec8-b86a-fd7f6af6b600.json and https://artists.proofprofile.net/proofs/artist/11ec0434-9458-4ec8-b86a-fd7f6af6b600.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x574e4b85726ccc777ae793126656fbedf59a35180e780a9cda3586f265cf468e. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ES71G1864538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e2a382c845ec878196568b73642a73b8b62895cc9c159dcee3e0fb27480d9d0. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ES71G1864539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2229b5b112c1bc8368e7be55360c1d4079d503a1c7004fd4d7ca912b1ffeff60. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/ES71G1864541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x468b3d9a5a845ff7757fe8117698c398bd0bc73e4b5077ad06d0c94db99ebb8d. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:29:18Z), 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/ES71G1864543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0025d599484acbabef56df8d0129d861c5cd2f39337a10dcc08d65643c1d46. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/ES62B1500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x246a7a11931f1ede36f4a248746cb4a4ce23e92ad3fc31b98a5bb172c685a3b7. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/ES62B1500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171b1be9ef8a3fcfa3148ae47b40ed77e3a9e8725b6fbb28c2de2c0834c58a57. 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/ES62B1500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2fe9cc578a548e4d8cbb0b9b6ccb9b62816f8ad093a797a73db4cd5cd2c638. 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/ES62B1500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd671e00a819c22aaa069a715ea7487b4c1050971a0d290563e141abd7c68e4. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/ES62B1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2998be9f13b54adb5b698510a91223e94964a25f2171ade19d7447c760687a9a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ES62B1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6654c9442ea15840e1883bdb4a33fe85c887989e9d756f6165824acc1ce3da95. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/ES62B1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c98d522e80195c0f6048c38ac0076ca69b5358e978abb5caf4b36ea4268b4c5. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:58:06Z), 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/ES62B1800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd8577eb40394593bcb5bfafb3f12331f0f57cea427f1fa1dd5888a91b6bb3f. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/ES62B1800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4440f39b6d64b4ff13a29651d99794afec5de63f27a07a3458528e744aaaa3d. 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/ES62B2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60825179fb376f62fe65b517064a796a44a37cb9a184143e64ae146e68957d77. 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/ES62B2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79bed5198031e2b32e89981313a55a5407565d6210afa13776fe3f556a39c0e5. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/ES62B2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a36f20a8385188dcd9bd75e32e9672c7b63f31af7bee2ab2dcaaa7f5857f0ec. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/ES62B2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x905521e65fe1ec84b577855682647e27d0d3d002b93309d2c9841f1436080462. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/ES62B2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd3fbe5f9f27809130f5e13341fe190facfac99cc654c41e5e9861101f5ad04f. 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/ES62B2000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb151a46fc8fbcc788e724ee750dfed9b9e8b3aa1f597c3744506f6fc26c04e6. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:12:09Z), 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/ES87E2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75142b76d179826b6346b0e2bc3c4ba784d7f23b5408b7117fa91daf9f2cfbfb. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ES87E2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67cbd621e1c65251e2a0e5dcee3eb1b1487c044cb7411b77f408f6f6cf5e6acb. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/ES87E2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x395ef49dec4c9c46f1f1b8d6d64bcecae30e7567e7285e06ebf40e5eeae754c9. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ES87E2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e4d0f290bfbc6fc8c3dacf866c638bdeb98aa6731c6ce8bbf583f051cc059b3. 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/ES71G1703424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc946334930a392b3595be002d8121280e211f725b2a77a7e3696f26e43896c71. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/ES6102328605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb31355952234448225b4deb993811749026d1105a236faf3b4b9cd834352c06. 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/ES6081910611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba98cf0aabe9d8803fa3af05d55725f2634ee7066d22e561c115849d0406086. 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/ES62B1200059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eaa3c18307d691bc6995c772d370941d88442eb9b55b2f97bc9968194959b91. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ES62B1200061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x832cb9b36795152197c4df096a6be35dbd5e2fc62fa6a6a74da5d7678035639a. 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/ES62B1200062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c37ccbd39a685d7dcbac350ca6b94ae965a363d1499fca7f9c77e0e89994d4. 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/ES62B1200063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2899dc40bed655e0fc5d0ce34228dd1b586246ad461a5b322189b2ade0ccf0. 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/ES62B1200064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa255201d545849cf58dbab319a4c7c914489c2de8fc036ea5a65ea78b3496489. 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/ES62B1200065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0878a701cf3e0f8f43616c9411fbd8b87ba5c921199397b88e653a30e075b748. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ES62B1200067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d6df83867e57477f45d32efb379bec5bcc88f151b37eef0d47b09464ea56ab. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ES62B1200069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc946334930a392b3595be002d8121280e211f725b2a77a7e3696f26e43896c71. 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/ES6102328605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ea673b6278580397450fb6d70ff5e1ff1b0b66eb886994139e6a5b2507e566. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/ES6081330513.
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 0x87b222130e23c1acd5a377cadaf59b16ec04eea403d6020c2c12e53d299ba65e. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/ES62B1200060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf86f9730e51ece87711d6a1bf2eb018cdaafc99edf5ab7edfc7fa7ce2d9f3a. 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/ES62B1200066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea69fc1441ef9115fbd912373147196c72001b85f6b44e9f9590a80cb3f248c. 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/ES62B1200070.