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 0x40c23f615c9769f8b7eafca5c939e4f1462871059188a7fdaa889087fd3a9382. 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/a8af01c6-8f4b-4fcd-8447-05681818381d.json and https://artists.proofprofile.net/proofs/artist/a8af01c6-8f4b-4fcd-8447-05681818381d.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 0x3ef7df1961634106999fdf9f21fc42e2f8dc87c90aaa5dfa051c568bb198aed6. 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/COA2N9500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe173324dab9d83d0c1043c2b8886253a5b3ccd7dc014667f69c5d6cdb68cfcab. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:59:43Z), 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/COA2N9700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da024f00c5a3b4f76731715615a22868b6d87515ddd7a82de39d76a622c46d0. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/COA2N9700014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3326339510e6ce934a524a95777b238759aee8cbaadb7d5f842a22b024f24883. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:47:53Z), 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/COA2N9700015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba3e1880d5b157e76b6a6fc3ea705feffad0a2df3baf1b0c72b37ca2797ad35. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:47:32Z), 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/COA2N9700016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c35966171984e5b2fbc1b1f3c92d6632b39c869f4be98743443fa67bd53c9dc. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/COA2N9700017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9e5e04c1018fa18791c116e37e348f2b1f8ca750e9952b8ba0dc3d29276a05. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/COA2N9700018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f10f341b8212e1fa900542226b56fbf15847ad4c312deda32f0d07fd5c8660. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:36:55Z), 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/COA2N9700019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711c9eae69ba3a4db3d289cb4f5535bacace905c1bc33ce6d5ee63d60a6f66ed. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:17:32Z), 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/COA2N9700020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46baa3dae5e0b6a43249f3de113fe3b51ed3bf9eb3f9d35c48fb0e42f5828925. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:24:09Z), 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/COA2N9700021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9bc36528f8be850080d43308510a933c9c1a30c5aa53840c552809e792b2221. Chain 2 (Bitcoin): anchored in block 958761 (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/COA2N9700022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9d9e98ad94be11bd6bda06454f567edaecf388e7a5fa1435f723c52604cc1b. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/COA2N9700023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b9d767d4b358098776a5a75226b1131e99321da5c2a80f8c91290489ce84875. 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/COA2N9700028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ad1ed1ba3aa13883fa04b05e1d3ca080076ed5a46cd5244e60d41bf9d73090. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/COA2N0000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d5535943b912d1db9016652854e8e21ebe66dd757bdbf69dc01fa7598af11fe. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/COA2N0000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd33aab779087ade6ab30caa470cd76f46b9f01290fe18cc7f191c6cfaa5602. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/COA2N0000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6671ad64773ba98726b6a2475b2716441c8e5790a9cc04c9a961513fa7a146a. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:14:49Z), 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/COA2N0000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859efd9495f4c0876144d89ac18ff33409adaa21710f3146de9f04e843d923c1. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/COA2N0000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ae28530df2150f9c0a756653a2669e5e70150f00bdd8f0996fb1ea5cc40068. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/COA2N0000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421153cc2362c84f2d9c4e1350bb7557de84bd57fbc1a8580ac37ffa61c202d2. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:02:00Z), 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/COA2N0000019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x692660ec31c4a96fe6435269d6917c5ffdbd870f78b3a935265a50a54e1dbc9d. 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/COA2N0000021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172e43fbfa087196ad2af20b0a2d82732887d5688a6298f38aa46571cd6b029c. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:31:50Z), 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/COA2N0200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020edac699db57920ebe5ca9423a755bb9114743c94490654aa834ab1536d64f. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:48:50Z), 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/COA2N0200022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0ed5d5bd4b8b65e6d9a4b08013829f2d8c12ab04c3375005a17c054448760e. 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/COA2N0200025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e863276abf775db4d9139858af5d4cfb346d41bd126d14c1c9fb6fe61b783da. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/COA2N0200026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8beeff52d8d93ff328c25c6659d86bf557ea190f873a1367e8f3666a7ce433b0. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:59:09Z), 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/COA2N0200027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1556cb4b438c62d8ad7b72c5f2d97bb9de17ce94d19a6e30c54e56202b1521d1. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:59:29Z), 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/COA2N0200028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17259366586eb8ec6b12f08524e4db2942a90a2448a4ab0d412c25c69a8c743e. 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/COA2N0200029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x991217c3b0056000f5336ace4e32f8908352b2b2b7e6606f1cd3c65093d31cad. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/COA2N0200030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109a2155517e67806d4925fec62e4c8158f7c818b7caf0458ae1a97bece3750e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:23:14Z), 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/COA2N0200032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4261e8815405445ddfc0a28d2fe83ca5fe0fbf4214ddf5977da55f0932e9d8. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/COA2N0400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d55e2eb84d5c31a06495939129e989b41038c39c9e0d7d3e0870647d59c88f. 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/COA2N0400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e51ded3c63971da6bf938d9602be87846886fe6b1a4a272f637cc04861c28b. 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/COA2N0400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e5388cd33170e4d40fd855746a5ff3a8b3f760c97167a816d66aafe70debb9. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:00:05Z), 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/COA2N0400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75af464e64978af21b37c7f37e65077b80449ac228c2a1eec422b3e01592fc67. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/COA2N0400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05aa712fa5a7c5c71a491c36527a227031528c47552ba4eee98639937c24d0cb. 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/COA2N0400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58077df70b4db4c7deb5a90b29545654e97e816efd1e0141f3e12c4b38cd412c. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:09:20Z), 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/USHM21053344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe61a996d40d65b55ec676baf02d84fbc64ebf668b156e7b5996337f20268ee29. 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/USHM21053347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c833cd368d898c5a7e60dc0d7fdcbb6561cd428d46c37b0c8e95068917bfea. 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/COA2N1800110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df426e0132252982e20e11f59c76b10d4b8ef529348f2886c46b604fe009a7e. 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/COA2N1800100.