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 0x036d7519e570f38e1fffb770d5220fe262ec6341668747cdfcc95352c226a574. 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/7e361969-049c-4e79-9a0e-6eca54b3bf07.json and https://artists.proofprofile.net/proofs/artist/7e361969-049c-4e79-9a0e-6eca54b3bf07.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 0xb74767b1a3bcd9292cc5300ec9fdb650087a3ee928fb72a90ddd7e63ac6a1805. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZMZ92126013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65180ebdc6d5e1e055ec7de2dfffebb85b0957ce5632cb71c02bb534113dcd16. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZMZ92127975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93bd64c1f81ba662f3c84c011966919e9b7e2d56c28cd8cddf7cf15bf45d4d3. 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/QZMZ92126056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fcfad13463c209af4859d25b30ab9252142ea923d6dfc2e196f0f536a6be9b3. 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/QZMZ92126112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11cb5e4c9c21774f869fc8d42f68c30d781dd1f42f9f1051ece759ef6a5eafe. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZMZ92128372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0181d507bb21b0836f23297a56c6e927e1c114ee0a4e7ebf6f1ed69a625510. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QZMZ92128441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45cb4a8b8deb2d440a2224ffddfd0a32dce817130f4d00f8d97580128547225. 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/QZMZ92128886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdfbb93f82127910fd46f993b699a3558096b24bbb7a470033a87fc26560fbb1. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZMZ92128951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c52ac06da45ff3abf3d0d3b25deabc89919f5ec0234dae2b2bb91cf450ce7f. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/QZMZ92129039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a1fcb7a8775f7c756687676767b0bf4a28993bc36fd8a6c4dc901238b7cb671. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZMZ92129054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60475eb6e00d4af9f76856d41dac216ecfbd27d2d91267410841a2c49fd21067. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QZMZ92129087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1460e2e656b899a180f841c9381db3f7ad93c6f3fe11f2d5a5cc66f800c3d7a3. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/QZMZ92129094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9edb5c7b5dfb377bb4d685d620bdb3aabb61f156ab00ef997ca51f3e25cd0fbe. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/QZMZ92129113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920fd44de3429503635c21ab5759061d64e7c507d2f9196b8fbf288c38f9992f. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/QZNJV2246837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ca752da6028f30a0f87b0237e091f024a21a80dde5bc37bcd3e51798bc3ce3. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QZNJX2202024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f84e9fceff77dcfb4e6aa58908721a3a52fac8aac01e75c183b23ec4fd326d2. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/BKDLZ2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb78ce56f359ee054e3d4c020e507fd62aee34fef185227767fd18f2514935cf8. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/BKDLZ2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e3891a352f5b0e15e03fe25bae1b0cbcb9be5e8edd8ae618169ba0d898dae86. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/BKDLZ2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1aa941ea14cb63d2d28440a4e17ca58975db5183fe766d12c84fed617db8f9f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BKDLZ2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8ffbc4eb932e6f23d77183e19f40933fa83a7b02cda4d3d342862952448b7d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZMZ92393272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a0aea4f01a09541fd3bde564a6d2d934fca2d2772bf1c0a19b853b2d1e007c. 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/BKDLZ2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f933174d029db970d3979620bbe8befbdfc1fa969359dd7033810c48bf2f423. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZW9M2379832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2691a336d2a40440d7c8d9569188ea8ba20dfcf5e7e1c2c2cd237db14aca54. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/BKDLZ2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd4e052ca10c1f81fcf3a8c1fa5816a874d095692a791beb54653636b9b4417e. 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/BKDLZ2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb23f8b6d11731f20b66da326f1a869c73538fae96ac636c9a929a29bf784d6. 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/BKDLZ2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf707edbf0b916631645ba7b72960298577c1dead57c3fde132938c6c7de3e2de. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/BKDLZ2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x073a255b0f5f2a24b2436888f2012fb197fa65a8f3fe07565951e8167f64f212. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/BKDLZ2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e6ffc325fe5ba1b51744e90a9e4812ef055d194c6d613361b17eb49bf9e32a. 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/BKDLZ2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7293949bffbc83cd27f3988184c235926df561b94eb3d0bb588590db2f06a3. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/BKDLZ2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39155e5c4dbe67c2549518773d802eb1ed752b9f37ede3f2ebe0922e69a486e1. 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/BKDLZ2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c62e7ff4644f0ae545ce7b0a135df9c413dbe03d33544a62187d6c624bae2ca. 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/BKDLZ2500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399263b38490aef2552325ad8e080dfa5c18095c36b7331c985d432a123fbed3. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZTPX2595544.