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 0xb27a832e51f47a69942e9956e95189b05af9b2b9ce43867a524696c689c658f8. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/db8c7cbb-4f30-42a1-8734-6af90eecfc01.json and https://artists.proofprofile.net/proofs/artist/db8c7cbb-4f30-42a1-8734-6af90eecfc01.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 0x296eb4b6aefc87e9f6fb9218bf9c7377f51f654aa2ec0044220d1820ac819d4b. 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/QM6P41543987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee053a3703c8b8eef5dd3cecfc3d766eef9f7ebfac59eb9aa236a48a9063e5b. 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/QM6P41543988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x140622fa61ca107a1f969bb75cb56f6e91630d5c3d8248bd480cebf57bd92d92. 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/QM6P41543990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41336c4c830f605770586d71522bf1ee050901c10811e4f002abf3feb1596dfd. 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/QM6P41543991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31997618a482369254751d127a56454630e2b1de5920f1036b5c896d5f18723. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM6P41543993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa55e6db3d9133c7a2b3c7c99536da5ebe9b30be32f42e114e3858d8855f83f92. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM6P41543994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a884c927a4b8789b214a9efae567e77348a7395b9fd05d9c436fe330a52748. 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/QM6P41543997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd96662f62c055d4e54cd60c67d4cdfe4faca82f0dca35785aad6004bae9a816. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/QM6P41543989.
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 0xc18c5bf3a60890a93175f501de6db2a232148dc3c41fcf573477aadc926d1f24. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QM6P41543992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d6ed4dada35e4b1fffbb58045cebd6f96a36a1f9cc598e893e5365749705f3. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QM6P41543996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e684f1a608e803573191d2f68d9b62ccf093cafb884ed723bc21c32e623fcf. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/QM6P41543998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc45a42d1baa8674d1fd5d8458bd7e6ebb1c7b01ab9dab38917bcf084a57558a7. 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/QMFMG1433020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0c12d8e9d62f2a109577a9c28df133fde85f5e468d794fe7466088b0e733aa. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMFMG1433026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb6283d2e180f31652014d375cbebe62169a8173beb3ca82f56ece69f3605aa. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QMFMG1433015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe86c80e0460a17ce3ff0ac83b4c616e4a085b846c5d132f243b77239e1790fcf. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/QMFMG1433016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd0ffbd8062cbd2bf8f6a1fe8957d9a7961ba466638e35cf04b4c93aab2ce3c. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QMFMG1433018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbbe143de32eedd49dcc87a3e58d7a1fda4715030295b5308785480c4fffa0d0. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QMFMG1433022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c285ff07eca8ead7a555abefb657b69509ea0b8c2dc617f78d63fa9e490f5b7. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/ESA011310540.
Ñico Saquito y los Guaracheros de Oriente (Remastered)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe66e53c5b71e9099f3dd85e1c72dbdaf71d36e2950aa5aa9eb9cbff04cc013. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ESA011303568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047eb2f9fd2af34dd8250bdf152be0ba1d3733decd0a62b6086349302cfb8c67. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ESA011303569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe783c35a70ace7c77673184a814f49417e6ff3d0e03bb08c99f80f90eb9f93d4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ESA011303570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f75e19d5ab5682cd1ab01281dd3646851d3cffa385a055b5e717b092e0c8ab. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/ESA011303560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41f8649167bd74b91d895358beb96155766f70f46173b7a069bd0584a6434cb. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/ESA011303561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed9cbabc39b6d7e11c04099c2732b87514bcc3fef18c3ad4b81234a5b5eecb1c. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/ESA011303563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf20fcd5a83c47f13ec0bf6e8a00be7750fbe7a52bebfb8780ab09fd32c8345. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/DEUE22340253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80626d77bf218b0737bb2d9363b4bfd5f805935434c1e24ce664d094708acc67. 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/DEUE22340255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc04f0ea105b6971bdc5d88a78426cc2697408dd2cb568a06bf0bd4dd487dbb3a. 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/DEUE22340256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x980904e4a66cbcf5dcad586b19103fcd4768c49b9350096a881d0c43d962c721. 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/DEUE22340257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48133293eecf5502c353f633d5a6548b89723d396480f500211a238e8578256. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/DEUE22340252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a2246ca1c5e6d5a0622cac6a21a8eb65b2e163aa5b297140fd20d456f34130. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEUE22340254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd19b31cec0032ca62468af1c9bec121de2afe327474011988bc69aeca8821c79. 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/ES6602207550.