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 0x6b6c192ed5a7280855d309baaa636cf15afa9c999781662986ccce63d2863f08. 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/366dad4d-f650-4ed8-bb17-d6ce95c8d4c1.json and https://artists.proofprofile.net/proofs/artist/366dad4d-f650-4ed8-bb17-d6ce95c8d4c1.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 0x2384466a46d2b5df26417d19cfb70c64751a552b36ae0ef9412288a550eed3ef. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DGA072194987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc89742d53d165e0edd2735efa1cbbce637dd84c03b995e8f6d3fd3ea1a79efd. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/FR59R1614356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67bcc068e077648275b27a657fc2c59e485ce55d7b2b2ffa985fb73437905ca. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FR59R1614358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43114d1b2015224e417806612b317ff77580c0b93296048ff5bf0411aca49372. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR59R1610551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46216c00c013360e6365b84aff72c0acfbf6c63067fa87144403db827b661da2. 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/FR59R1610554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x407e0d2236bc7b4c1cd6c2380b9864c5f042d1a371dbc3fef3f1f9a3da615dbd. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/DETO41532837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f19faa59e59943a954f411dc5dc1475c96b6b9405988ecdf466637695b0fc8. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/DETO41557522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c150d3997f78a1ac9f1b8917b647702c58423571ba30fa0a5379aba4e1f98f3. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/DETO41513793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x430e77199e016e601d9adc2728ab7679a21478477e48c7f5cc08d65256494770. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/DETO41573706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40a8ce518df33b5675bfa991f04ee853a45475619db3e99ae00e46e2085b3d3. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/FR10S1899311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea854d58df482c91fbeb08f0a7df6823de417ac778d5309bdcb554b08b5141a. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/DETO41416794.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c7a6a85417c1a5229255ed5504cc1653511cbaea52171ff67b69d5d94a4c62. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DETO41640030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe01d2d4d5a8aec4c908d10cb40b7b795e53b0d0c51f9389e08613f483d7ceb96. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/DETO42159496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7879df884365d4a85c2dd9b74896c2d07bce85ed9f34ace3637b0417a00f047a. 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/DETO41593366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b6a6299d4bf9bc97eed458017e541e39214588d4f74c9903e0ff09673d11fa. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/FR59R1756420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x997759daf9225cbca0e6cf509bc8a684c19a5fd9b7d540788dfce6da02a753d2. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/TCADL1813287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x983c31925cba62099bf5e5a354f204a7a5f7622dd63b6c86efd886a7390c4e11. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QM42K1829621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ee4af723063ace82a864508aec51c227ffdac13a39a8be4217741873000601. 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/QM42K1861311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f29eaf8160ccdfdd9452cdd3d5616e5bc755958068d23d0814e15f27b7facf5. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FR2X41801726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f21e6af597e2c23cedf76e15e3be29414c8ac8da2f2f4bb79079cf19e738b7f. 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/FR2X41801719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b24485a2185e001a9f8b59fef928d0a7411cd4d7f78218afae40ff5d80084f. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/FR2X41801722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb7d8155e12dae6b452968b9d3d076e0cfe6e0e307f7e5ca2606912888321a7. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/FR2X41801725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cee5e356992560aace3c1d229652839dc8685309a20478ccba4ef7858adc4cb. 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/QZDA71933159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2556a2315602ddcf984fdd56b235d291b97c3044cac2d51f6bd8918c948bcf6. 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/QZDA61992747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ccf1b8ebb230e6893473374feca9598ecdd89100b8ecb34e814b2b6df8ee4d. 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/QM42K1914204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb112693147f542197b9b2ab3ed07a5a9790a10720fed6c463fb8846db92149. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/ALA091900237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcf74a74659b621d1b8179878b0412888d52f9a72223bfc658bd6de3e488e76f. 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/ALA092000106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b69f2c0f8bc624c5bc060a7903cd1f53a09a6d47784d62a01c5e181b782b46. 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/GX7852500366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380e2250e857d45cd6161c85bf9cc0a2761cf62bb59415aefd25568d91674e36. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/DETO41589607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a03411e1c0d55877e962adf7c041f2dc87e519fbf2d882212a218f29e9c170a. Chain 2 (Bitcoin): anchored in block 957957 (2026-07-14T05:10:34Z), 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/DETO41548744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5184011ebd816523b2cff6c26e8ec6c6e3e8fee6294db58b471471615d203b. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/DETO41513001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8263a5bbcd08aed6db944d01f9e7dd1b04bdc90357623fa9c556fe8743f8db6. 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/QZS642307634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e422ac8a8a5a26cc87811e044cff512f784d661aad32008ebc71ce72015502. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/DEUD42561943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b6ae5555f444997e223af13e010aa50a6cbbec90c674400ba5d34577a1037a. 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/DEUD42570046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585f6fd3e1ac6b68b6b057940dcaf4b04d2ee81b3c2dc746bb89846159791e49. 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/DGA052575437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0b09ee4104de4ce65c068c27780075bd03418e8e2ae9a2313fa4b642d26f4b. 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/DGA052575438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3586fa2aea10c2a2c14584a4f411b4a28bce78401025e3bf059fb08f31552a69. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/DGA052575439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9898da1c861611ebf45af93c37b8966d51d04bd0ca900e1089d4269f70fa9531. 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/DGA052575440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0991b6320c466bdf25fd6bcf6dd11446b149f3539ee3330bb94866d7f3cfbdcb. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/DGA052575441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a2090917e7586240393589b41c2f3f4a8c47086e158ed3c37482115e57dc55. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/DGA052575442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4bf4df1f07ba816c32a7d65f389b5118b1fa5bea2b19649c319f905ba91ceba. 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/DGA052575443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ed49074eef0aa34495cef2dfb68eba8c5b852c0c3a9f70286c06deb53d3bc3. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/DGA052575444.