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 0x23c02329432abef307c466bce58366697319a62cd779106862b3d8284dae3a8c. 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/aa4332ae-3a44-4168-b950-a3b0cd042123.json and https://artists.proofprofile.net/proofs/artist/aa4332ae-3a44-4168-b950-a3b0cd042123.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 0xc5b8907ed962233528657f40dc2e05ecd78976c38df33257b8921425094fe722. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USA2P1957097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31fd3b857d0d01dab3b7b9cd63859d7d672def3b371f1c3f713d06e5258f577d. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZ5FN2088739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d8ab6e5a44ce8043783fcc7f988feabbe22be9bb24f41ce3efcda658c49c06. 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/USA2P2109787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32564d0748a042ff4a5f04d1c0105f8a59b91ad3bdc7de3bc64e8f363ec20cbf. 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/GBSMU6085665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f376fc7f6d11301d8b8192ac3101793176dcf6548edf6df76b3c43559d27b9a. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/TCADZ1833721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e8f192eee0a7cdc59592c35040bb7d8cb03669d8feb83f5ff6633bf076ec55. 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/TCAEB1920491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1efae6dc7250662a2fa1692f63f5dee29aeacc45eef05452f07860a41deb48. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/TCADY1858032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da390a8a15a8c20537a4934a69dc4343e25a2de960ddb3dd6002d76dd2925c4. 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/GBSMU6085670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2037ce765a3bda7cc773802cf3ed8d21af05c0e76ccd207b9a89187b4fae5661. 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/NL1ZN2402973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd3558d5fb24105fabd41a5e01132cbe043f90f0dc8cd04282bb672b274d482c. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/CA5KR2472045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dcd3111adf9fa9fbce16c1075e9978fc59828862842aeea51e0c9b1ce1cbd5d. 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/CACWV2487639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaba354e88e6dd0deaa6fbf6db308d7aaa37e106bd2785278aa2b95ca6eedfe8. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/CAHQJ2391403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e1b1f1b10922d8ef0a94233b59d86734e9e676ea26430aef2b4f376d9638d37. 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/QZS642220106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c40cf2e7e1fb98b1cbc8c1d16b3601d5223a7023e7191086958487e077e2832. 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/GBKQU2239378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274ff410ba5b60a8fb412b00a82454b68d350c527fd3e76b2083cf78c60a03cc. 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/QZES82212849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe11fd82ee2c3a0be5245cacbc51f0d788e56420805e208cdbb7a961cc05464fd. 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/CA5KR0024058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa22745e79a8a2ab6f8398bd80dc57a49b7f23fadc263c235c45a2d49063ae40. 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/BEIW12100306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa29cfbc757999aa8055cf99b474d99beb1b4b68fbde2180271fa0673718b509a. 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/GBRKQ2169665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70707a8ed046c2acfa16f79b9310825e8c5e9857328db981bde339baef25060b. 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/GBRKQ2169667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e31d0173929e49c7013f8a5fe7081567fd6c69ed0d993e208acb4ff60a70d4. 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/QZK6Q2166256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c5cae2b3f4cc4d91b82f5ceac3cf97d9302e64de31b449ab2c11e5eb10c5c2. 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/USLZJ2085910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49d9aaff2fc0df459fac415eabf593883692ee7c43bc10780134e257ff5e211. 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/GBLV62012901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9564bec6dba2243e05a208f543e632372fd90397fe7fa2303067b95ad81a5995. 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/CA6D22000283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6e6d58a6ceec8ec4bfac67fd0121917f746f2f815d06d4f4ebafb3842a1969. 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/NLT2H2000203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05af69c3740d00aeaad23cf71736a6493002c2c8edea1a704b72795ca3027923. 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/GBSMU8381146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc96753a647d52e23aef859e1028a37ccc650397bdab6e521476f2e8cfa996e. 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/GBSMU8298707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819d24d685a4a0e94508cf244ccef9737bc7b32f800e56639bf75398b1f09e49. 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/QZ5FN2023776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0fac53f7d8fcf8c115322f533dd9f93f9022fca30b33f7c8cc1758a5c64365d. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/GBWUL2070677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e94d0dff2f0af5973b65cad6f9d7aa3ac07f453814b3b6f5d73c6904178fb7. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZFZ52097098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc470dab56c117d65257ea2ff5b2043d95c27f13a19a3d2b4f33b8828b85d8c49. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/GBSMU7697684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfede2fcb40b2ee5caacd7b9725fc07b4bde7ded0cd002e95292073c76999c6ce. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QM42K2045382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a9db78829a29c7e9bf39c7806fb9b653de4370e3ffe5e2badc9c6b2ce311540. 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/TCAEJ1965302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x588fc743ba53837445b631fc0d7fc22da6f8baa7a2075f6a4509e8ff9afd9db2. 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/GBSMU6751916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba5b1482548f613f7df15fd524c411db9d06c70491c4bb6d9d53b7239a485c01. 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/QM42K1961541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc94db89b4eab1d17104359acd6faa3de4550468ab74e8b3195542401bc3eda3. 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/QM24S1906012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9a1d1ea63477a5ac00ff9e0f5ed45353ef8f0b3164831af8a15957898694be. 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/SE3GO2210501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9564bec6dba2243e05a208f543e632372fd90397fe7fa2303067b95ad81a5995. 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/CA6D22000283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f63468f1e0368e1b86877a93eb710c7a257bb9bce81ff0169d1719d1a160cb. 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/USA2P2112356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d8ab6e5a44ce8043783fcc7f988feabbe22be9bb24f41ce3efcda658c49c06. 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/USA2P2109787.