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 0xc4227d31017d561f07aa82059da967b2f8cdab942de60a9e7a0ca85b1593fff8. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aa0ec9c8-80f6-4992-9461-598ae4343083.json and https://artists.proofprofile.net/proofs/artist/aa0ec9c8-80f6-4992-9461-598ae4343083.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 0x9ebddb7f2d9251bc2ee75c233aefef684ba4dee01c7f39fe8623a0cf7cf90071. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/BRQB91300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5638c40406fcad6ce11b5c2a757817d1ec002e394eb2ce844785ff01b63f35a1. 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/BRQB91300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc470ea22826118d4ea68f5687b8cd830d29f9386b4fb740f8057cef9096d6eb3. 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/BRQB91300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9a273d57f20253a41ba8bd3a9034bfba9f833bb491f912eb423cb83f5ef146. 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/BRQB91500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e0c73ebe1a8ab430efe77ee50301dc115b631e9331e3cea0422205c286c4b3. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:49:47Z), 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/BRQB91500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3def92890d847d029e4246d29e3885b0211e94921715cf160ba200e8353742. 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/BRQB91500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x668e2d39e23cea98902399ef6c0edda899c0e71859258e7e797ddd996e2cc734. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:25:53Z), 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/BRQB91500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3330af5ef73ce65187e9545819c3a2495923ae95efcbe8a28b8fdfb646656600. 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/BRQB91500039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458ac6ef45e788e12714c6ff20ac08c340797339f3c500ed0610b3de35bf7baa. 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/BRQB91500042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3af640bd4777973b389449f230e516ace32c9a6c2ab254d6c3d9bda9f80a77. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:41:48Z), 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/BRQB91500043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98022e536596d4961f2df5615c9f8eda6bd020153949353a3e5e4a3429e1b3e0. 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/BRQB91500044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493d7c40884127214b20d3c90c69fdde48ed507ade8c1d5d568f195adc57a971. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:19:51Z), 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/BRQB91500045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf918399fb60d90f69dae12b0e0d27783077d1f7d615fdd8c9325224a33a94b92. 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/BRQB91500046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfaeb122d90cf2abc67d74a18e43b7105b0f7fe019e39b98c3a74632e421145c. 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/BRQB91500047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4920e8fd80be12b4c6211a968bba44ab9071b141eba1be516e59a90eff99b82. 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/BRQB91500048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc012f93c3d74d6ae61a238b62cbbd3716909478427a447e8463a6c3bbb8e90c. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/BRQB91500049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2820761f66fb7aa694ea99bc038e2e6639ecb5ce24d0e35de25db2963fd674c. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/BRQB91500050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x838fd97382002b43cca705a47c4ccb9e896085dbbe7e5e524ca8768d508adde3. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:42:27Z), 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/BRQB91500052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab6dfb20341d1ebf8c7551a2864b27302703cac3f4c86888cb03b07a112713a. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:49:48Z), 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/BRQB91500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb7ed62c358ad9f26383067ee78e4874bbf80a88595995784b264abc25c1fe0. 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/BRQB91500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b25ba0b37e4d8753ea48e20811f87d74ceee09f368af2e25096f052981314ba. 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/BRQB91500019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6bdbf5ca7b21096be35be24e868b1b7d3398629c28e73e814787fa9616192a1. 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/BRQB91300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x107977584f4a6f930e57a649bff3d9d259bce9d50ddc35444088c4ca751752ba. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:03:22Z), 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/BRQB91500022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c01c46a4e0e7c0fa33a86bdc1d9eb2a54306ecc2391cb498d7006da3c51f070. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:29:26Z), 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/BRQB91500028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc764c19e5a47eedde67c5973166efee1591512b5ad9d2064bf8b6a6c3fd9a345. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:24:00Z), 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/BRQB91500054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb95094d2a140bb99b95894b0aedfeeea7733d9a376190810d519dc20966245d. 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/BRQB91500055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb228f00a98ea36f82c893f61eb3995f2550040bb26062f8f892008f71a05ef52. 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/BRQB91500060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d81aac648197e36e3a7f66ea096b6b75e8b7ac3b5b992520c0c387964c8983. 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/BRQB91500061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x505d22b959ada18b12356cdad2c67bb8f1e1b9f250477ba533bfa94aee7f4573. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/BRQB91700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1da5118980ddc7ef430b8033c228ce19b84a441d3a009c17e66cf66f05df20. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/BRQB91700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35800eebdf201ebb2b96517a24913872064446cdca9f13e25cb4ddb60c5d9d34. 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/BRQB91700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c3db148d55611600d1dbb91d2cf99a55bf460194a10bac4eceb350ff8d1cf5. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:36:28Z), 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/BRQB91700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a072762d279747cd734cdf135f881e170f3c0d05fec2bb8d84a3eed551d1214. 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/BRQB91700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09adb9fea2b16d112a42fce29edd90ddec9f0f72e83dd8b983c3a31e0b76e77. 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/QZ5AB1757870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9149d92c7c84b602c13b1c01d7b24fee3f0dbee5e15b31bfd2a3a325c692e8d5. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZ5AB1757873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc46524ec58df6aa4050419966b127a2391eb012b6a556ea8b90f7fafa65727f9. 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/BRQB91800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f3a34fde41379bf54a6bdc2e620076b42465c2c05b16341869e59c0e146a4d. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:48:57Z), 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/BXSYN1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe8de557e4720edb74911e4d201f63a42600ae66e645e9b2543a6ae62b91852. 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/QZHZ51903332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6dce97a6b0190fdb76216d1248176f92a2d8abb5e36dca538a05bcf9437336f. 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/QZHZ51903333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88317abbf8896899f24678b5cd82d952a886fa8c048752064de93bb7e9f120fe. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZHZ51903335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb23a7e74d145225a456babfefb74d09bdfb71e0afdde965628e4813d677c7e. 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/QZHZ51921423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648a2c6899d81e1c5203684dbd4190ac9aa738b68241250a37df3859bce6b51e. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/QZHZ51921428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd040a9d642c91877cf4a2fa9cb2c0b7e8d5e6d00f81e3874bf8531a368447055. 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/QZHZ51921431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9618b59a97c299bfd220977692aa0d6cb3d9e3ad4d7a83db25e7bd9a0d94d2b9. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:48:02Z), 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/QZHZ51921432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x627a542eb666da41b81f46cb700e1957dc4f8c89979c8dbe41fa81a54458c3d1. 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/QZHZ51921435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d22bb12cc28671559a9bc825820c44f2db3ac7b7e982d1c7ecbdd228feb769. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/QZHZ51921424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4badbf8170f8bcf1d098e7dcf63bd06203e6950abc2b968f47b940d0776cf88e. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/QZGLS2046711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7632ca2e9b1246bf4116e3f5704db79ef3ea405b74ba1c30f6432ea2d703b42a. 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/USL4R2060990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36a0469066d7fc2cbdac2620040d10258ab0766a9c3ba40fe4296802ed5c3dd. 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/USCGH2124086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408ed3d9de34a47f03690f5d66e0bf27dc25fdfd5dd52ca55100cd477ac3761f. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:06:12Z), 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/BXSYN2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d0627499efca5426210d053a587572cabc2f0d728d8ab33db84e997abb5d38. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZNJX2388858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd27ef44468ce02b81c13a01157fe903354276bd76464559ec9f3a7c926f90414. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZNJW2517994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe17cf88591c77a7d6b163401c590eb78b7514f1d14c1aea5ec5a9b1a61941944. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US7VG1874793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c5334a39b2d53861226a8be4c4c32e64292f2c8d27317093b2388783a6750bd. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/BXCJH2200002.
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