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 0x798c0c9b550f1eebbc3ae29d736d11ae0b5fc076dfa811583598ba131f6c9864. 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/e4938e91-cda1-47c2-83ac-5f9660ea7eab.json and https://artists.proofprofile.net/proofs/artist/e4938e91-cda1-47c2-83ac-5f9660ea7eab.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 0x580f8e8b5c1411903c718bcaf897e08a7a709be03466f0148520851c01dc9b69. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/FRX762427803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b365131b52935b4a789ccadd2b7f5a89d8bb4ed901c39f90a4733d50b678f6. 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/TCAIO2449231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe81ae9bb17cdce67e800d6c5dca0c95ad1be7bf9a391a8857a6cc43850b4236. 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/INJ221907963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1fa186f999999229eb8b3136b55f273446b3782739710ebdffff8300083ea4. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/UKJ8H2404813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6df6573366de99b9281b749b4a0a60ea603dd866992f61ed5d18606d6229ccb. 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/INB942401694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb2527267ee4f1d01285b8d7c72371d8e8feb5bf3922d52354118959f2d9237c. 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/INS182400492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31fdc994752d6ac2e1253c59b6988cfdef12de0ad7c6f754fdb169fe99756cd1. 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/FRX872409731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc733e6c3e7ac575a558678ae04f321f906a58d3f5a40d814dd324f2e4dae88fa. 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/FRX762400842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa940bff333c372eaa6247b765a851f16001d61caf4cb1bfc42cf6fb9464f93. 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/FR2X42417678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe572682c1c1dc88e85c290e39cd1539c7bfdf14778a6a886f16162af6c010a2a. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/FR2X42496929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbf9cec81226ddd1c87c57c9c5a373de134f2ecbec8981711d0dd83603d01b95. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/AUBEC2400911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x583a087452af192243b767a052188c7654660ab5e82e3537d1ff0866a6e4ab65. 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/INSD11935132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb861fc182fd2e762fd9931dd4a5a148e117fac8b765c98cf1c0cc2677d147438. 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/INS402300063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6761b4fc3d4090804837e0d0d70508b211a6ea282a0d1f1b678e89124941376e. 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/USA2P2335989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4ab1ca66f31e9a0551ad907432b3b36b8dbc219df133053b1c89a55dcf7b0b. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/QMEZE1946742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672fff36ae02dd049c715d99c81f424f30b2d76b972c72b44e1fcb288002b392. 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/INW262300284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f96d1d80ccbd2f9feff62952ac115c0e8d9f2c8506ee187b21001f47d3318c2. 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/INS402300031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecca1f8439b6436132fced60925aeaa3114dabcbf76b94d386f743df9ee38662. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/INT132300075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb698bf5db0d4ccae237b866a191d03db69c004a7ef041659289fa89f695ca4. 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/AUBEC2238956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf66e21b3eb96e9f6352416878f8b262dcfbf7f9d7ededdaeeaa4ae307949e63. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/DGA082245225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a7dd0ca41b8e804ad8c8d14a2a937fbaf508a97ea1edc731d5407475d2f7dd. 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/USA2P2250871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26bfb23d780c569b4cc12239e284c18ec8d91e2e7ebeee293cf26f01dbb04db2. 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/FRX872240590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e27aa8c6beb995c6c76dd1242f4d35ce5baade371fd00f70c190f0669717692. 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/IND712213887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x477ca7158035f33fc69b77c9927098562e4048a136a17b564e084d4f65fac3ff. 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/INE182219759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c87997e3eb5af69412a4bd85f551faca24b1ff5545ccec6ca81841eab6b56a. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/FRX282254669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa3c55fab95220d850e63865cd96038b2a54d83b7d2d0ccefba2587b2714a95. 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/USA2P2225768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef2f651888e7869ab27ff4cbc823237033358e9c45dcb9df5e782c2eac9dd9c. 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/FR96X2252799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f1958897e094ee14054c7d96dd18906cb265b801b7688b43be5785d4b9ceeb9. 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/INB942200455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c81e2dc7c6540bb72fb5afae190a56070da13ceeb39a28f0476559223db45de. 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/FRX872183177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af5a3629a7407ed8e992864623e2fd7234b82da730f48095ac30eafd68d75cc. 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/INS182100436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f327cf6d2665e943a8ccb11fef61062993006e8a641aad6ec616a5f0fddbc6. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/FR2X42168037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17efb445c001445593a864c57fd4d894a619ed11fac867c4f03e45ef8b7aca0c. 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/INS182100172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438ade4bd816adc3dc32a5d7c8f4650d2b5d177ed5602f43b6d5fc3481f80294. 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/QZMEM2031160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cb6bd1337c6dd68b4826bfdf80ac8c6ab2e98129428797479808afe5e9c3450. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/FRX762084043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe81ae9bb17cdce67e800d6c5dca0c95ad1be7bf9a391a8857a6cc43850b4236. 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/INJ221907963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd398ab159a646009c1a6120be9137a2bb7a9319a7d5e048fb5bfd5d0be95d5ce. 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/UKJ8H2405405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f82155c97179aad71a8f41b66bd7bf7ef8a6f7982401f42c30f87faeca89ff1. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/UKJ8H2405153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15fe44a1c0a8bcd368364ca6a85b014d3c6a28b217b72ea01f71d79d3641f930. 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/INS182001565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa00670ca0c2a2e9f50d6a3e1dfc4e9b058b086522641e190e9ec5cafcf828e96. 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/INSD11902380.