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 0x3bf8282a6f76195c29eb4de009a7aeab2527530196f663b9052b443d269c82c7. 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/01d82031-fff6-47a5-a058-44ddd1fc6e12.json and https://artists.proofprofile.net/proofs/artist/01d82031-fff6-47a5-a058-44ddd1fc6e12.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 0xf4cd3571d6f3b0ff6630a21fd583367b1b448b72290988411c4e67e0be3ed18d. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZTAU2270112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f73e56fdadc92654316cdeb47b7943f4b997b1ee17589be90d716241a43d046. 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/QZTB72289968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76c73786b2da64c1d20af8459d78469e0ca23176a3295bb92d8223f4bb33f56. 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/QZTB72289969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2163153f25b6c478e5b02d7c11592d288044413fb213576d23ee74056da6a327. 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/QZTBA2273928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb5abe3acfd971a74e967704e7419e16df0cd72f9c6148e76d4de16c28d217d. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/QZTBA2273929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf09d83fe0a0b75911a7e44f8290c26d070f54461e95cc8c083ac5968f1aead0. 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/QZFYZ2303332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d9e6dbd90f2a23179950b6f8ac3dabef5c109b4040267ab97d1d91c949d760. 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/QZDA42300935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cad3ec0726c9b798ab2776fd938059a93d401f034a562e499a929cfa858ea3a. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZTAY2309587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56995302002e6a0f494c277e3da364f446fad14c7073f7d57f47fd3bebf449ab. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZTB82479085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb68d533085c4882c80dc95af79ab158aeb76e73dcb2e046c224ad62d292cb1fb. 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/QZNWW2482862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f8f852b83f90a595540e09f899968c70378aff81a6407b8795a347792ef923. 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/QZTB42492250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c33c4886067a072f1b1eccaec9713ff5232d951bf781bcf939cc5a6f7778f7. 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/QZTB42492251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2cf286ea22cbec056ceaba691c9bebc32d87c1569ecef6dca9ff711bb6993bb. 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/QZTB42492252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d4478855e2a9f2d943b5fb09a2036172a7caef752debcd742c9d6b44ddac0c. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T18:00:04Z), 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/QZTB42492249.
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 0xbeb91839263100be7f379ada5ffa2923e03a875e6540a5a640e96d37239a11c3. Chain 2 (Bitcoin): anchored in block 960231 (2026-07-30T08:33:28Z), 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/QZTB42492248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x395674c7f04a68cb729bfcea25bd1b5124c59f343aecfd4ed2d7e2485d34c89f. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZTB42492253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c396f0e341a66287489ef8c569bbe842bd94f0dae56e6e9dbf494c57badcb19. 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/QZZ792491509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb01582987cf0039002da19e9fc1e7eb6d0e95819ae2f1dc12cf73c7844b00bf. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZZ7Q2494562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782cd7ba79d9acd28b66a3f9f52665c25b5509bbe441539c13e49c246e2dfdf7. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:42:24Z), 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/QZHN42577422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da7134c657e248feaae351bc76cc3b697ef60dfc1b1f125650783f7bd99bd02. 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/QZES82555705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc910106f212ca5d6a8a08ba80a9388a98dcdb4af05d4e67bf267ab0102149fab. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/TCAJG2533180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf71e1dcf2957f08ac375a4b5e54fd13474156b2caf19dd735ca858b8f79beaaa. 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/QZHNA2502079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da7134c657e248feaae351bc76cc3b697ef60dfc1b1f125650783f7bd99bd02. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZES82555705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc910106f212ca5d6a8a08ba80a9388a98dcdb4af05d4e67bf267ab0102149fab. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCAJG2533180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf887caef44a8d3a03d1fbebd79068907504ad0731f1f4820bf3b6c1021d000bf. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:48:07Z), 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/QZMEQ2564859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b295e1a0f2f8eeeffa649a6abf87a0a7b663b02749502d3d64a364fd9178479. 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/QZTBF2526674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204e7fd66360b45b439ceb436be285b76684574830359686d763ac026b36d552. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:58:16Z), 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/QZTBE2536494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x337ac59550923d1bb09c4b903688fb229644eff14d272ba6e55ea7edce750485. 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/QZTBE2547623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7f051fb1312310a17124c4a35abad7b258d504198450a7ed93e285a4980fdd. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTBF2526676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff932e2562549e04bd191f391c14cfdb0a208f2b21ef38998193797049c1d804. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:08:53Z), 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/QZTBF2526677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a31fd960357149672c52f5a4960a6269df71adcfc3e444e130bd3a536fa6ee4. 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/QZTBF2526679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x588bdf1d0f89ee0bdd39daf3da0b0b7f4e163941beecd57ad242ed729713ff5c. 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/QZZ792578303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b72ec3b20f3fe0b45951f00097ce396af195e7c9dd24a4d0178234bc8cb620f. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QT65W2528192.