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 0xd7c92de6be4b9622fa4fb15c747eb7ad3b5084266dcb31b3660eb09bc504817e. 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/64b21478-913d-443b-8f64-c5012f2ce577.json and https://artists.proofprofile.net/proofs/artist/64b21478-913d-443b-8f64-c5012f2ce577.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 0x7d8cd0aed90a2412a462ae9312f35e3f2ac29b5f161a25d58bba2cadad79331d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BKCMX2400210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eeb5ffca5dca3b6d00ad305d7abf719bde364b285172d21cc2bc203cc2e5a9f. 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/BKCMX2400215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92b8390520ad52eb9bbc674e592231a7bcb9df04e68796c0ff217544a50915a. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/BKCMX2400205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cdf0b4b55606a640e65cf507483708b494e696791c8580d9cc06081ea1760d3. 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/QZMZ92448084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1040ec67de1ba7f4bac899ffab963e0aa6207b2d743e23b83ed78793a0964afa. 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/BKCMX2400160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f9e905554d4f0449380e516f59dc86d644acf3c27ef32ac4537c828fe79423. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/BKCMX2400148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b03b1ce0e6173ef30983726c9fea70c7e1048c26b099e8fa18595e9cdb3399e. 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/BKCMX2400149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021a8f2228cd0da1107aee3b16a33a88cf085431785e307836f8ef4e4287b707. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/BKCMX2400143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc80b084cc4242a52e05a82bb89ab8e962e67b5866890fb75e52ff741a0199af. 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/BKCMX2400145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc51b410dd15d37db7c76aa8f266f17d98bcef5445d97f73e0212b59bd32f36. 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/BKCMX2400137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5e3c344b543352f1a3977fd8c033c6fcbe0492bca29a0fa67747096e95d249. 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/BKCMX2400138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860ecc9188683f67fb43f17ceea57a1a6a4c6b6528c10ff021b6cc565c0591fe. 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/BKCMX2400136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29f0dd84668bf732c80a99583eb95ceba9e026a2f65e7cb75565cac56ae9022. 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/BKCMX2400110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ed202cd832815917c68fe0c89e71b81050e70dbcae83ac618ab05e71d3c738. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/BKCMX2400119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf73034fb7467456ebea76945b305060f05652c41a5fa30e95889f909ec24ca4. 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/QZWFK2383629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x016bb426c809d2620ea6f7c6b31426a005a0a889126dd5787dc4e10cac0765a1. 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/QZGLM2424525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d1c76819c2a4252eb1e9f065d7a06507a1f5d2ca192507ef5001f52124300c4. 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/BKCMX2400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d98a71a6f38c6a68ad739353623f5f10b8c749571c1ae7de25b3e629bc39709. 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/BKCMX2400062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ad79265c7bde9f97f0b7bcefafcf8855dd400a30f9e401071ff5a76abe2ffe. 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/BKCMX2300152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe781ab3ed38c6632bd1fdc4630c2e26ec0b5c23be22b86d4d20480c98ec9142e. 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/QZTAU2367254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32db13752412a89ea5643bcb6879d9d962ab531cb9fe6ffafb24fb92b139ce37. 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/BKCMX2300139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54eebd7901e935da9e65f28d6a807e7200f7b5aae1d124c5b1228cea46b28e97. 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/BX4IU2350486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6601de41734335470da1bab87a987d3d75f5aedb316efebf857b6fa002f641af. 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/QZNWY2306580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7cd7d0488e42d7c354bcdd6b8922fd84123beb1fbb1d630bd611efc0f11a89. 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/QZNJY2357522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57626764f29801fe1565b153bee3f77a048eea64cb8d3ca4dbaded9d80bf4eba. 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/BKCMX2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab3e3c5faee57b9c3bb5ab071f1a805ed5256e3a7870aad884bd855da516139. 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/BX4IU2332371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9684dece8d8b81d81618ac3fbdff23b23c85e710def5909250a759c75ec27063. 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/BX4IU2313670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1626368fe9c033b09d81de653a2df90e49d090c13f00c369ec87d73e4b62f360. 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/BKCMX2400523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712e9daf1ec0d5c04e51bda995cf36606683dfffc5188da1fd6421cb3555faee. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/BKCMX2400503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce943937117ca7f8fbc9cc8adc7f9dd60abe9d799cca9c95e989dd3b162a63e. 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/BC8182500024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ce0d7f7ffac6bb5145eba6e50b7bfb49e8aada050cc8389965775416126c28. 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/BKCMX2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e290292e61c9c8973843e6100f4b0231f56101c10ef8df9a22d31032a5cd4e. 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/BKCMX2400512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea13d1c1339a8f984e49353d9b7e18c6420540937feba0713a9156f56f6cae3. 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/BXTRN2400640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce0199df32a555b08417b1c535d3dce481176ea515b6cdb3b0c763d9b47648c. 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/QZ5FN2548717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ebae16098e1e96c2687a2248e8bfb2d182eaa5dce8081ea861dda4986e6261. 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/BXTRN2400588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x959c1fa0c9161b86e73b75466914bdc09ff153a6639976c4c717002bb1d795c8. 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/BKCMX2400467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb159c5d6068e322e510894e7f254a43eaac38454fda9444fb314f558b0fdcb4. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/BX4IU2416885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc2b07fdb908a98703c2185c3e6f006aba0f7babce49286f04d7576e36f51d01. 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/QZWDW2450413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35907d0340276ffd03416908548dee86770bfe9cfba8b89dafeb048c695e3805. 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/QZWV32459125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe325067b36376768dc71499902102b05e7483736228bbc9e72c2ce76a4aa4fa5. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/BKCMX2400348.