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 0xa4b95b20ff23cd45137ff92871d366a31baac21d447ebd0a61444ff9136dfeee. Chain 2 (Bitcoin): anchored in block 953895 (2026-06-16T05:46:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0f292c05-e4ad-40d2-901e-0910bd140f36.json and https://artists.proofprofile.net/proofs/artist/0f292c05-e4ad-40d2-901e-0910bd140f36.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 0x0308c9748f1bdda8354a315ebf9b6c1cacf340a9c51e7f27d0dc026a6862482e. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QMRTJ2300305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad13a9a2602909215cc46b95abced6c4a7f328ebf417fb94d878b97d19014596. 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/QMRTJ2400472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238c1bb856683931f7f6c22f15f7a7439b5eb26c2a7d094e7049342c5ef71e0b. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/USA2P1935181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x130967a2365b54ce168d1464e49f01d9291bf5f7af497b006d0ecf226b9ab601. 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/USDY41605690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e47315f99e4ca75885d7f102449aeb09972fb6183d34b25f54864a67ac7c75c. 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/USHM81813563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b19b401bbe9c1799fdd2c5ed1924b698cdc6027780a9fc827619be2cbdd74b6. 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/USHM81813564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e0602eecfb1418c57bae8e62ae0dabfb0938e0abab3a5692a1228a4b0ece977. 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/USHM81813565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e486dfd43ab060b2705ab9dcf293846192b4bb86607ee9d7df9b27ee2c9d6e. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/USHM81813566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25cad8676614b74d5be5736929191f38378144c1c08c6c0d6932cca32b501a60. 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/USHM81813567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e90ea7b61f411aa07f1bcdcc2ed9bf84ffef4383d3b8cad7dde4fdaa2552a2. 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/USHM81813568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347a925475ed7446aad448b524cabf881dfa4e2ff4d5db80788e92f97c1b8d60. 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/USHM81813569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3dfd70d2b4ac2621404ab07fe9795f4596bcfa10737b9e647e7fc484418eac. 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/USHM81813570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ea5a8553449fabff9fd442692f9db09ea23fb17fcc6cd6888906fab0699ed8. 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/USHM81813571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc953f845c0539bc9450e897a7fd379fcca327c63c33bb55aeab368b3b54654. 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/USHM81813572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69aad002edea22c2a7aebeb21407dd27f35d27376fa862f39cecc1d47f4a93e4. 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/USHM81813573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc273adf4f3784cfeb6ed24021ff184eb0107946933928cb1829ef108e46ccb. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USHM81813574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1563f9ad73d660641f39151ef77803ae7a725054b6560babbc3e4347763fc365. 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/USHM81813575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b0cb493811296862b1d04fd9b2f5f392ae9ceb43e391af97d1f7f67e96a8bd. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/USHM81813576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c5acb980f1b7394a7b23d840af90c119b3d23da67fef8209fc92c16102e78de. 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/USHM81813577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e864e3236a1b056f77b891a984253573137f68ad918bf9596b575bee38a5035. 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/USHM81813578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcdb67ac704e0cf703919caba0bd1307ba834de4adfaae0fc6a7bc9191ee8be3. 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/USHM81813579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75cfda51a6469b0026ad345fcd8e3d07731858fa2e233474083dd6ae0e2a87b8. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/USHM81813580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e18cfbd954fcbb67ce2240fed474d0da48008dd1b206bc0aa7b6b75c8d9ea6. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/USHM81813581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x511c973d6f6fccb5fc29d9c5687449a923cc83be48bca7444ac512e770ffe7e5. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USQY51752381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9a9a7145cb0a359be86118614104b939642b82173ccc89b902e247555c309b. 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/USQY51752383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e12d242da38db04dff0fb058e19354801a71824ebf8591e9052c724185d846. 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/USQY51752385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2419279b81eb63691edfaebf72e74af4486625a1266c863efa06da87aa6e5c7. 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/USQY51752386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d6af829c8b2bc4b6db2f7fc1bf400e5b14b1f24ed13423c1259586da53ce02. 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/QZNJV2453252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ea9100c09c20a66100b9de9d91eae89803a9a9ca6ea6db591a0ba52a66be9e. Chain 2 (Bitcoin): anchored in block 957246 (2026-07-09T01:49:50Z), 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/USDY42225273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc05d981e52948355a7a1f1a7c681355db92099d87d18689d5986b5ef427975b. 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/USDY42225274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88cb3fbff07c67ca9d9fe226ca9b35c159e1568d8cb02a684825315b9c69743c. 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/USDY42225275.
Last of a Dyin' Breed 2: A Different Monster