Letherette is an electronic music production duo, consisting of Richard Roberts and Andrew Harber. They released their debut album Letherette through their current label Ninja Tune in 2013, and have p
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 0x01c54908e632f6177236d596f12f2af1efb469d93b08b0f8ed1118becc6e3fbe. 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/e07a682a-1b24-4ce8-a55c-6387ed4b8111.json and https://artists.proofprofile.net/proofs/artist/e07a682a-1b24-4ce8-a55c-6387ed4b8111.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 0x579f11d3c3087ad2abc4f650cdb8f849106be6af6d972c86961f808232ee0c44. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/GBMEF1000245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c0397006609bbce16a1588978b598cb7668390c5300bbb055e55024de9a142. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/GBCFB1205018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5e99673d36406558dee73876f21c17d0a8e04d3d1c805795f0383fd003c9ba. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/GBCFB1205006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1bcc73a1bf6aef91b0ed638ccd491aa7f9f9b367a0d8cc1c2a12516cbc9439. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/GBCFB1205007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96bb76b55bf850d3768048464cd20712aa9b972b75f3ad4a80c78545095888a. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/GBCFB1205010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331df4f90f96566320b8303f434a6bb24a40441e641c808944f6ff93ef88689b. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/GBCFB1504400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811fa74d357d7b027f0b1052261fecc65c05c2229ddb1111e9f68adb03e9e706. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBCFB1605000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x473ef7620db574acf7d6c59d41a1052a55e85e0638ccccddbded439088ecb193. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/GBCFB1605002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88f8e3bd57550625cbd3b8ea87d84dc477900eb2755bc85f0aa2e0e69422dde7. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/GBCFB1605017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdacdccd7c7d4ea9a5e22c1ac6599d41564306aa29c04f4d17dce221160763b99. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/UKJW31700017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8890992044e40eea1d1dd5648c8d3a1b80b389a447bb788d4d585b4888db482. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/UKJW31700018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007a657811aedc00cd72c34d5998b0c9f7efd2818b09c3a64e8d88a293a37a15. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/UKJW31700019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9959cd270c4dcbc8e01fefda2a957ab97bee71a264e319b812c3bc4d7d56214e. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/UKJW31700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe633e5ab8e1b7cbf5053a12b943f5981b21d4f1410358095656d558454006c9a. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/UKJW31700055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd0eaa950e93c0233f558aa5c1488bbf944436e1c319095b3fe51c5ac753c4d. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-21T22:56:27Z), 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/UKJW31700067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9631372f8bc732ab159c0a145b811746efb483dce6d295af12053f6840bce3d8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/UKJW31800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4cb4d0c3398e4b44879109adb5d6dfabc28bba58c41f86d9ac14b7bd8d6a717. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/UKJW31800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79fcdc01440c704a9317898b7e11ac06d28ea1c34d4117f510539a7f812ef767. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/UKJW31800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd10347d7d5b69538c52f24bae9f2090f275a5ea4d8f790300431475077f46a. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/UKJW31800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76de38370851269f8feb92c6a2a89dab4e8c6853b5837319d4b4de85fc08e98b. Chain 2 (Bitcoin): anchored in block 958660 (2026-07-19T04:21:53Z), 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/UKJW31800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1daf1cd11103ff0cbba160ab8223354042bdb0139cabaa3169bc1449e239e43a. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/UKJW31800016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf481be4fd6aa8fda03952f7456ae2b8d07c81a5b38893b1925191d32968c46fd. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/UKJW31800044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b98e5d3e68759f4b5d41731d3b00f6b3c2a8e92ef01ff264d916ec3eada4a1. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/UKJW31800046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d21fad1248d5b835f47654fe5eb783bda11038bff04e6243a1b57d7ee13ee3f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/UKJW31800048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766f5df60a4ff25c500f6785607fb6f412c0c7826e9bb63a01967bcbd5a8de2d. 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/UKJW31800060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b55f45d4a1f31e1b9e525b78126957069a0c9cd7fe9ff405d89660d1fadb54. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/UKJW31800067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e5cc934af942fba3445d277ef7762451c1533b927856d4b72074f00fe9e06e0. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/UKJW31900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149b029616f8d935a1c75eaaba968240470b8d4ab8be8a8f24e93a9db8e9b3da. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/UKJW31900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf8787d818fbfc05efb7b82731ce31465a93de36901f24d673d6b65877c3fa13. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/UKJW31900022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa72510123bfd2fb64a7a3225a90e675264fee3849f7b2cf15f63a74297c33576. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/UKJW31900024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd952fec9374f87bad0c12dafce82dc3056350ef5dda3d6f67c5bce13101142ae. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/UKJW31900028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77bb53dd968046fac8deab25e14a3f89cc0b005a079f48edd3dde5290a96e993. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/UKJW31900038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0813acc8d58a0c845a4eb3bd3da0ecc533ce183b9cc69efcf11e197e109f275. 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/GBCFB1205017.
FG Chill Out #2 - The Deep House & Lounge Music Must Have Selection
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3cc264485db06ebb2644a1512839afa143fd3faafe1b37747aca2fec711146b. 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/GBEUE1800166.
Eskimonde - A Decade Of Eskimo Recordings
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec1d9ccf4e28d7229d3caf6d217a61967730fde324049e8cbde365c66b54c7e. 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/BEN581000585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b2fb1c97878cfbe94db8cbb04261edf7b77fe8ccf342947bbe4121c5bfbc31. 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/GBCFB1205004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b2fb1c97878cfbe94db8cbb04261edf7b77fe8ccf342947bbe4121c5bfbc31. 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/GBCFB1205004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d16d86f001cf60090ec4e2dbb40d741c8e63b6311a42bd6f25dee4ff0beb31. 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/UKAZZ1200026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x473ef7620db574acf7d6c59d41a1052a55e85e0638ccccddbded439088ecb193. 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/GBCFB1605002.