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 0x7bd05826600446f32d7b72bcadf32125a29682a95462a9149fac1f80ef25db2b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/36308b19-8fa4-445a-848e-c877c34a916f.json and https://artists.proofprofile.net/proofs/artist/36308b19-8fa4-445a-848e-c877c34a916f.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 0x9bf8efb3fc6558222e3e6fbf0bf7e433deb935bbab4cca2f4df909199e1313a0. 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/IL5841923825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71387c36646c0cf06829ef926d42cb99d5b63509804e604ccf2e80e9e55dc330. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/IL5841923847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9696adc955ab6f2682504134300f7cfe7b2ca8a1cba28e91113f725672d70fe. Chain 2 (Bitcoin): anchored in block 957025 (2026-07-07T10:59:31Z), 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/IL1471901571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc11ca4670c0ed09da380804338185ec80200410597557a35f6b33e27fb398b61. 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/IL1471901559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6244d868474f3fbd1c3b64e8f0e55c4713c86269b1b6d2de65ac07be869d03b7. 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/IL1471901550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e1bfd71c1fe2beca5883677e54196a45a85d9d8ce2a97dc0c2a67c8d8e75ee3. 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/IL1471901544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a208b6c1cf395635daf6ef4e2cf023331af166aa9a0add8bd14482311059a2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/IL1471901547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad0df7ce5e3ae47ff29cbd155e1f846e8b488cbb31c59e7df02090b787cf094. 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/IL5841924388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1b2119592dbec680f59bfc8c665ecb8c573c173c8ddfa1b5f3ceab24d1f7d3. 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/IL1471901574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbaf3e291ca4b3b88b5c63d5736595dd6d3bda0ae05e4a6421c7ec0db8320e35. 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/IL1471901577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x764d9be528919eab2c2dfa9c1df324c82b3470dbbfb12df74288a22f6f9ce128. 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/IL1471901556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf714ba9d0613cbb54c8fac32fc0c6137bf88336caef84fc074bfb499e93db40f. 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/IL1471901565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c90bb3997a2b8ed1296c1a21e7b21f47e042b9adc7ec745bc4cdbe1960c499e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/IL1471901562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ac58ce11028532542851ffbbcc6307e0aa88cb58beff63bfccd4d41ceb6d07. 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/IL1471901914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea96020099edbd13917d3415727aa123886f9c2715d4cbaeeba6e7ce8c2effe4. 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/IL1471902052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0479a38a3332605edcd5f54c15c52ee8107f8207bafbea874fc494ddb95ad010. 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/IL1471902118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cfd5d8e7f57e81e1ac9bc32de3d20a095e0c7ab5cec9e24f14e6df30d04da4d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/IL1471902251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa40b5a019ffbe160f3ae4c0bb50580734b47c61444a129d4969491431f028763. 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/IL1471902254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e818ce9bf09248f7da86cf1828f4fe0bb4ef8ccfe533ed0810ac1ba5149fb4. 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/IL1471902257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5836ab66b1351f0d1b7191fd0557ce4b1a9b9e09d4fd6c60a643cdba23192925. 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/IL1471902242.
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 0x8af4a9730e82e0b28fa3f27273d56a83ca6edff84303a0c0ba96f9ac39617ce6. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/IL1471902245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec2f851e7c1325cd66d1210427993fe9fb266a81e45dfcfe4b416f3ed7546b78. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/IL1471901923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a90bb1e6c55fad5399b65421c124b320671235ce1a7945dd75a29de1f1c41a. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/IL1471902149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf56f0d0855d893cdc0ee5b5df1b2b14d6c37ddf06354be0da6424ba5d4f51f46. 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/IL1471902273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45bf8ebaf3f73ea00527d5d646edf3414b882dd4709e8d69611cc639e358c6a. 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/IL1471902524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85508f412b4726ec23d7230f7ec325cc081a795c9c6ce950a934c14e8842e202. 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/IL1471902620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b030370d275eec7a99083425f92e1a6f2b2f3bfd08bdea906094064382fdaf. 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/IL1471902621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02747b27fae810fc23d8b762f4e8f327d62050b612592419242a99be8beb931f. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/IL1471902625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83733e69a119401c86d3caac7f69bdf84ca328f19827219289fadb609267c5bf. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:47:35Z), 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/IL1471902627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a31a387cc8b2109ba59c4d95cbc73474c1cb36484e322bdc4ad9d6e3610b59. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/IL5842238694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26fac8698ba939138e4b9c88b605df7eba03d8ca8a16f28fb2481909d6b44987. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/IL5842238696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4bf29ed0559fd9bc3b334e87b308ba0f6ce7ff0ebbf73066e87f59ced7dbde. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/IL5842238700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f0534fc3ade12a287695a9c6ff7ecbcf0a9a1c9da7b74e8876ce43bee57574. 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/IL5842342128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfcd38122584ed49d516c037c09c922f6a8e35f1cc300b9e480d9c7c248085c2. 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/IL1012301772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be2be77b50c6d30d8136fde96f8fe46d3019d44954e8b42abd07792582700a9. 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/IL1012401708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e9b8fa856a880a5aad181882ac2e4cb4fc4fa5964bbb39c7055b7b8e95dbea. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/IL1012401709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6bf2654ae52a5a56bd9a1defb0da9ba42c513ec2650cde4553de0f4b4da95b. 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/IL1012500579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f5abccab6c0ffc93d64a13b7d2993a8dac4a7fa9913bd843335985ff762530. 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/IL1012400812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f5abccab6c0ffc93d64a13b7d2993a8dac4a7fa9913bd843335985ff762530. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/IL1012400812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1427555304914537778ac655430b3d0eb3cd6c9afac5641b173b044515648b1. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/FRX201975587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1365754110d03cc10da0f0a3edc03a1acd12b46b5fd8dbd2149b776abe4b8e7. 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/QZES82236170.