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 0xb77e0573a4e9b90c8a6709fbc7d085333e519caa28147764e9923519870db6a4. 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/94ac0608-392b-4570-bfa1-211fb8da7bab.json and https://artists.proofprofile.net/proofs/artist/94ac0608-392b-4570-bfa1-211fb8da7bab.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 0x17c4154e98feff929dd5a957bc98b8eff19f648ca4cac6718788c1be0c565605. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:43:39Z), 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/ES71G1856959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c6b97877ce8e5a5a43e19bb24a4d19d8850ecce35ff67b64a2cceb0cf29a3ad. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:47:25Z), 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/ES71G1856960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce2164450c98ba50d8fcd1c2335248c0ad74cd07545c6ce1175488b5f733c85. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/ES71G1856962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5fe36508a54ade2ed195710cd8fcf39c22f7e22c96a85494fc00bd9bb7ccb61. Chain 2 (Bitcoin): anchored in block 958647 (2026-07-19T02:36:14Z), 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/ES71G1856964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf90953ad87e188dc3c9598f489cc6912aab7207d69525811c6348c7dc3a203c. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/ES71G1856908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e63559aedf4d09b2f767ee419648f3a88af6338176417c70512e22748de153. Chain 2 (Bitcoin): anchored in block 956775 (2026-07-05T10:41:06Z), 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/ES71G1856909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a8c651e1133ba0e5a1c3c45310524244937d377879c72d826846160414a814. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/ES71G1856910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75441620abd732c24902aa4a7107a1510e15da1a5e53b55e76ca54766b75d1d2. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/ES71G1856912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2cdb4c074897ffa68ff5c90d7ab733819da7f88c50c1b14a6e151f616af55b1. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/ES71G1856913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361472306aa76447dd60b13c36e094287054cc4b2a5d6919599f5836648ba645. 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/ES71G1856970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7436be37cdf080758153a0bc8c02e93966eff84d77a10142ad7f59f0fa50fc12. 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/ES71G1856971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7304c79c260b772d9136f1b19b74830f14656f88fc0221f436bc005d5aea70. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ES71G1856972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c05d52d9a35cd54819e2f44d9ba46dbec00a93a441d52cc6cc3e1504ab0ffdf. 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/ES71G1856973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d2d98cdfe71ce95a7037c0edc33fa1511bd7f3aa82be783079d5c256860689. 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/ES71G1856974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5368337e4b8da1cf9e54485ce974c3fb5db614e622ed91a5492cbae3e6ff293d. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/ES71G1856975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x977066283888e5e2876180fd8ec95f545543a3ec00a736848464e58f1f001a24. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/ES71G1856976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3735eeb24b8c504cfed4960e2eda77477a4a539a8e0135951f4288b007adedf. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/ES71G1856985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb186bf00b19535d40ec2713bfd7fe3993e43ed40d3d33751b547bd9c57de07. 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/ES71G1856984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf23c1ae59f9b437a9aecffa68486ab18ea57f6b6030b400660bc758512ff6fe0. 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/ES71G1856988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ace65b541977fae5a6f7e6dbc05d3a3f3edf347808747aeda738bdaf86444a7. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/ES71G1856990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24a2e1729ca679635107396c07df15c60d31c0e264abfa7ea4f091d0b5c4f6a. 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/ES71G1856987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b404a781e21ea489e44078f4c89d8d755c38c5752dea87404f6a0f37abc2737. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/ES71G1856993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91fe936e7e7edf1d8beaae5f378b5d6e1998eca2620c4078ef77633f03f3aaa1. 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/TCADY1831946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ab48ca6899ab9c79e248e688b2837aae208099e9b4c7fa6eadbde7624ede9f. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZHNA2083515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a9e0fabe64cf1dca617e713d3baafaf8b98d7d12d1f8d7991cf42ee18a337e. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZK6L2213989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b9b8150d108ccf1ad5caa6cb9c744df067538c3514f7b62ff2b671cd297fb5. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USZXT1580802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4db643d0c353f56eab7b99b4b248b6cbc68894df6795f8f5a28a7aa828b6a2. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/QZFYY2461985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2467dff0444a90c5fc5c58ad573ee57bb04e4e2d36d823460884af744d9f1df. 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/TCAJJ2537693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35eae7fa2fd466ffe065322bb5e073e78cc628f7bfedc5af2854664d9463a983. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZK6H2505584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x969c75cfe1af9934f404ce2590cd9b013fdf794e7442b2982418ab8e4ce0dbdf. 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/QZMEP2541378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dfd1fd740368675fe17f486677a7c842f85dd6aed93adfc6d5151d05617211e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZTB42513039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754013067252c29ef95fed3f0176618f54818de9475f7bc85949c087eb7b50d1. 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/QZGLS2103179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754013067252c29ef95fed3f0176618f54818de9475f7bc85949c087eb7b50d1. 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/QZGLS2103179.