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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c13294358ea07938877721baaa11785d55f4d7e53eeaeeab8252b6ba764f8b. 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/3716154e-9eee-428e-9d1e-21ea645af67e.json and https://artists.proofprofile.net/proofs/artist/3716154e-9eee-428e-9d1e-21ea645af67e.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce93bcc371301ae7d2d7f836c21450183e8461ac7929c7e23706281c95a9b57f. 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/FR9W11707808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d37c939eb1e2cfa1dfc9fa682e913bdf0ad67476db267ec191a2205205a83c7. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:51:48Z), 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/QZCE61821885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8488c690f676f659ce17b39cd1712ee22e776b75b27c785ebf4ccc1a3d5ed4df. 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/QZDA51878245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463683567d0fd7ff05b209460906f90304f276ce1fda0bb07654adadc6c8d349. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZFZ42028107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e923e864f486fa731b8e99101d966c0aad0ea26f3039509229f1350047104c. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZFZ42026321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6dc0c6788dd7b273cced3aea367404af54338c7503d1eec1641c0a2b78cbc42. 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/QZK6J2056505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bce57fc0bf53295fcefed5776ba36cabd4535b24bee28b935ce1cafc0d0e642. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T19:00:58Z), 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/QZHN52187191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416373c0026d88b501359c55d4592ca1f08a55b27c8c224b612b868d81ba9171. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZHN52187376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8250941b6ccdfe926a4349d85067d5b94a7ebec8fdb45b07d40325000ad8c5d2. 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/QZHN52189136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x136bf0766eccc03ca322978e9db9daf2eb8c60c5896d4e9dca16802f27947872. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:28:39Z), 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/QZFZ32227907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5926a3e25c2749579a132f65c1136a03b233e47f02533c42fc9b4b0513f958ba. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZHNA2252279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f33253425531e8d21a84dcc7a267e3dcd87236e6540c04895698d30c2e9e29a. 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/QZTB92221191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02fac62ebb1b802288b4f5b74e563c14afd8969b106ab7a43fd6883d3efb6db5. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZTAU2386516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x735620c859646053cd9f3db6a2ca4f4595523699c5d2918e1c40c19a0d199075. 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/USANG2493094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ac2659e1daf034ed5512f9a56cd25ca9b9ed7063b3a4761af41ee4a07e0863. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/UKZGC2501765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66cf784533091bfff5760309239a0771437757c5f0c1ad1d81a0a3fb3c73a234. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/UKZGC2501766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d271b72679b5eb89e73ff57227c8e1bb7ebab9fd8ddebc9690bc1773267bfa4. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/US23A1595264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff05200300a14f2ec5bc5e05c445daa8969d8e2589bfa8492005be74b3350ab4. 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/US23A1595265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56523966dcfd36895f04f3c9c63c159e364423326e9df218b0c1b01604eb88bd. 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/US23A1595268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ecfa9bc5651bdf7607e721a0d60fdb0ac8c7f5f4eebe67cee6c9b7ba07d2245. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTAY2586863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2fc13a58bd11c32056db6b23ab383be8276452880abf16d79a2460706c42f14. 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/QZZ7R2560115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93034c48a35d85b170aa8dc6bd15e71c82f579699ab0c2e078e948d49b36f03a. 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/UKZGC2302593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281d3e876085ae7c3a4be21766c61e9560aae3550a0186064ad00795288cb3c0. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/UKZGC2302591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa9e1163c7ee1c1bee14af86e4806911b14a2a77e53e82ce57f98e70ee3f35a. 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/UKZGC2406169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e1048ebadd833fde9244dcf7d94dd656eaeb833e05a12b2586c5893b7449f9. 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/UKZGC2304204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5814ba0ec4506da2ed17d5e6c074805c611774c9e5b83052d206f291df4e6cc. 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/UKZGC2304210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x066f4c3c163e7d20b6ad03fd10c02d8212507106dcd05d96379cc0fc9fbcd2a1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCACP1614727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be99ab611bcd9063041ab260ed5857205ded29196d0b967aace60fa8fa792d2. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/UKZGC2309214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe0fec7af161946bbf8069c29eba23e1acc06bcdb1b3a879463eb63c1a1565e7. 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/UKZGC2309229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x153e76964a66fb5dd547f481e052bf936cb022fea878e03635611e3c04bf1a56. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/UKZGC2408849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd67cb1bc18315d4c1d37672976901c157cba6339b3950b742c5a47a34d88c1. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/UKZGC2302590.
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 0xc0e2935c13f4d0eddefdb68b6147b24dd7fea303bc3ae1ff9d1e3b2cd6764b1b. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/UKZGC2302592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659e1035d596a7f9e4e6ecfd43d5cc0294f928daf698ca84c7da84f800d1c6ab. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/UKZGC2404443.