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 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 0xff7b4ec8db9d42e0e308b3a44867d82159a4d14b11a0e2fc237e906f8c7e5e4b. 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/5a8a3d1f-2664-4916-baac-7755e387ea0d.json and https://artists.proofprofile.net/proofs/artist/5a8a3d1f-2664-4916-baac-7755e387ea0d.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 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 0x943e565f8192a78f512952a246aaa7f304b9609c336100359f5e17620dc7d891. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/USL4Q1852399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae32ff1f0148c502ee04e9ce9e5b4bd0c6b4613780ae8deda77d9b37fb24e7a5. 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/USL4Q1852404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x881c876f059a9e6a7b56dcf9a3c50478a8269e3b9f8b0183d7a686d7daef5950. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/USHM81980214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0019ef77538243ed73ffa9d4cce18f6bab2502e3fce25ff8dad18774a5f502d. 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/GBLFP2287372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4adf0db6918ace538025ecb5ebf127700e5fdf40e5ee1bf0a13a93229c9c55f7. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/GBLFP2287366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e2e7210f0e0a17cd905e2372035793d40e3edf48ce48886150dc9623901535. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/GBLFP2287369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda60e259677388ff4d8287f44064e2ba31cb9fa8f7634219cebcb1aa9229d47f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GBLFP2287367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a92c865b3fa6d2e19e0d5522da86d5fdcb0e6269a5776280185ba83acfd1615. 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/GBLFP2343549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90f9fdbc4f345cb36a336a7f2f088c52ed8a5f3af89159aa9b17175c15fdd11. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/UKXN22341763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f83b2c2921c51093750bdb88e951b86d9aeb59390254de5d73638d008c0888. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/UKXN22341765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4ce6bc5e96197dbcc02fae934041263c6dea7088e98d552357dec965851903. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/UKXN22341766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666244b27f8eed092daf8855a6b106666d9c9b44c408ed3aa85ae48fa6ba385d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/UKXN22341767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30595d04ef782a7cabd68ba734a3a044a96d6c4b6b96026c99acafb6386370b9. 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/UKXN22341768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49b136139ee3261bc1fadac33ae3153110004130ef981c63a01be6b019780b3. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/UKXN22341769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a92c865b3fa6d2e19e0d5522da86d5fdcb0e6269a5776280185ba83acfd1615. 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/GBLFP2343549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712e89cea27e0369c4d13b77cd228ff6cb41d5c674630d33d8e9f6d78ad62557. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/UKXN22374977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65e114dd2d6a01f23df2f3cbcaed8f3320e9068340b244ac1a167c8f63ad4a9. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/GBLFP2384339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c32c87ae6f9fd033749a5c40e1664ce89c1b0a74aac8a458a57c3fc570688c. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/UKXN22341762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90f9fdbc4f345cb36a336a7f2f088c52ed8a5f3af89159aa9b17175c15fdd11. 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/UKXN22341763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x470ae77164e4f193689f319c6f1ed77b1c41ce83af89e08bc331abbbde732242. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/UKXN22341764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f83b2c2921c51093750bdb88e951b86d9aeb59390254de5d73638d008c0888. 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/UKXN22341765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4ce6bc5e96197dbcc02fae934041263c6dea7088e98d552357dec965851903. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/UKXN22341766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666244b27f8eed092daf8855a6b106666d9c9b44c408ed3aa85ae48fa6ba385d. 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/UKXN22341767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30595d04ef782a7cabd68ba734a3a044a96d6c4b6b96026c99acafb6386370b9. 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/UKXN22341768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49b136139ee3261bc1fadac33ae3153110004130ef981c63a01be6b019780b3. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/UKXN22341769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf37f09f4c828a235ce3453bae934c60f8abb31a43d42dd9b427e4a1b610ebc. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/UKXN22341770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10cac8b1ee8cf6cbe5f5f260a8cf7f227a217e4eb6ea5c7339c82de983aecb8. 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/ARHXW2201211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10cac8b1ee8cf6cbe5f5f260a8cf7f227a217e4eb6ea5c7339c82de983aecb8. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/ARHXW2201211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc65f921bbeeb4d960cdb836b7a8ef2f253604fbd24f69681b3a47e4b743138ae. 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/GBMJG2124097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad986502a21f80b821dd3a0d616434b44adfec707dadf1aff0ff862ac06193d. 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/AR4HD2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57cde4618408646a9f82c3d91bf3de6d21b44b3644982cce5aa72e54e5e0b17d. 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/ARR092300341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x702213b03f0c9f640eb5684d429dc1682c90d45f461dc27587f4bb4961e48660. 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/ARHXW2402122.