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 0xcfc75a2ca439b2c120a8236ca2cb25d5e7d4217a3db981cddbe8bda25d52c00e. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5b1618ec-50f9-499d-81ed-328fdc93cc4c.json and https://artists.proofprofile.net/proofs/artist/5b1618ec-50f9-499d-81ed-328fdc93cc4c.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 0xdf794147c7b71aaa1911276037248e36c7e1f62af7980124f5880d4e1626afcf. 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/QZNWY2428505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698671ad07e915157f7060a59d2ec00c5bc43dc34ba9d0e327097c50265afa98. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZTBF2473886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f23e006f04d0598f9b46909a6a45a5a537b1aae8866ee665390e068d9809d4. 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/QZWFG2481732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b08b94ef0c8585802d640ebfd00efb7d06a89ebc7618ce8c58ab46f97c5f56d. 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/QZWFJ2484866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f461c4badc58015255daeb27bf66f6a530739cfdfdc6a30631e212cd64af44d. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/QZWFK2455645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0eddf22d70de19e7cc286242169ebb6b909d9096eb1265955ec828609aa4cbb. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZWFK2453892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300917db1d4842fa9f22a618b11e30540bb584b569d91a6721f2f29108147b9c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZWFK2455649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe0c140d5ac1774b65e5d55f15297e48aa5aa18c1bb9e892c7f5d99daf32ac0. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/QZWFK2455646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdacd5339f2f026f3bde8a17ba6f7d2b10914f5e0d51ef7c79b5ff6222cd8d68. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZWFK2455647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x153b6a6381f7e9544ee555a8cafce543aca3246f6a8677a8d3d3bf938c278e18. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZWFR2400074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8b93e08fd250d8376f10b22d600b7a8416f775af0af831b61835a0da14164d. 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/QZWFP2488847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7664e702df44e8c01ab9aad3c3696d4024dbf728c9fcc63a537b5648814a1a4. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZZ762403867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72044d9b01cbb14a4cd9ab08129196f4563ecaf4e3dcbcdf9d63925d1c078b6a. 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/QZZ762406132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414b966ac2664feb45a059e097e845a14953fdc597fc4b68081d1c0e956b7dc2. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZZ762406124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58778d662b053a3c87d18668ab99331f635ae2886277ed8194d358977cff93fd. 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/QZZ762406140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb2ea15d644ddec1ff7c2797b7ceafef8ecf2a4069a2e22a334a682655380b85. 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/QT3F42409533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc904a6564a57f6df5752ab18585c7255888e2db29014ca3382f7afac5e941f7d. 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/QT3F42406166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37da855b95d26c01fdf1f346ecdb4a66aff71d9154f5c4826208ca80d210ffa. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZDA42517848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb74fff134dc3581707e708b0d6b6070d26556612042b6eea3b10c7f89c4f93. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZDA42529779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2180a001c8d1f967fd98db1c134ab13513e04287bce3d14f8bb4ef2e3c7d6c3c. 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/QZES72579193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57f1a71e7d5578934e1cadb4cd670777d4db7b2a57b80809c223051b9c06373. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZES72577396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f7918afdfa670e7562c6978c838a4ce707d627690022063ae74822eb7f688f. 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/QZES72577523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2f9757524eda0e077f59b89a429bf5030ef48b42ba20f7f3b8d48402253bfa. 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/QZES72579227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de8312fd594d290c4ae0ff07a97c22bae5f3317b391aa65265c1e001a5e654c. 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/QZES72579231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748de7acf45cffc4e42c70f47043b9c680cbd3fb6d7356fb523336615f30c8c6. 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/QZES72579238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb219b279f7797d6806d5f888deccc0fb728b6b0fdcb2e7a842b4d65aef5d075. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZES72579245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc571a2a3eba90e6ad5eccd7ebbddc149296bf5bcba4fbd204c6c4231c4b1463. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/QZES82569102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c3f884550ad91aa6ed0527eb3d898d5066f1b5ac3423df58e34f86b85fb742. 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/QZES82569098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87dc5e2a40fe093c475042499cee88adfa61d54a8bb651b35c815f8175905c6a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZES82567832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf81feb77bf0733c3bc52562a6d861fe34452b78210f8afb29407808f9dae39eb. 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/QZHN42557305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7291be1256b782986f7e2603ec3efacda222f2abdfa0f6b2650249fa944b9e15. 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/QZHN42557309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0efc6449da1eb8896c080ae2b145dfb7b32a620d461eb4135913c1f0dab4e19a. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/QZHN42555141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x743aaede899840c928a562302a246cd2b6d222d096b56b52017d6ed9d4ca9f1e. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZHN42557298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4dc5a11125bce7dc16277af9358117c36fb18d3ddf8c37f8d7212fed6c7848. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZHN42557721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb87d655365308b15d373731e61940986875befb0e6a57a949f5e13bccd8a69c1. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZTB22517499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef313b0b75d677dc8c70ed38e75b1096a144852b21fb9c8106f72fadd64b678. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZTB22515673.