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 0x54368e1cfd378e3558a31be7257f10672de2d8abd8156acd40e0ec44e734c81f. 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/e6b5e5d9-fbee-4658-9539-6a4c322586a2.json and https://artists.proofprofile.net/proofs/artist/e6b5e5d9-fbee-4658-9539-6a4c322586a2.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 0xb90d7a7be1bd699fe2ea621c04c750c7ad2f5912d6bf5fe6206e3cf2b4f7ae7e. 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/GBKQU2348264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d9f7276cceb1e99aa36678ab383072fe18e56259f39e8f3abb568bf1dfd7f7. 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/GBKQU2345114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac7ca7ace2a87f3f952c7edeaceede265754fe7ff41aeaedd3875e2c7c923dea. 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/CA5KR2339527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6717e3d4f2c6d7b13b473ce6e1b0dbb0d0d2d1c79c60b3a25cd3c99da4b9b09b. 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/CA5KR2324908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b53355ca33127f8147ee88115d90bc7fe39962c959a02df42f0a47c1c3e7d5. 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/GBKQU2450324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cec975ffaa95d6968f608991718b6043fb2a0a4f457949c664e72569f57f9f2. 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/ITA061302807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef4d8cb07dba4891f8b40c17086fa8dfcf68472f6f4a9d121dffb432fc9ae5da. 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/ITA061302808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac63f857dcf60f7c12372876c29ad306da4a5486112554d77774a2747c96a699. 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/ITA061302809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171f5a5bd8ff30fb1bc4dffbffe488b0a9d90da8c4ada04c5999d9e267d0d37f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US83Z2511870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5d70e354cc4f0e496156dd3880ca8491da8b665c9265502cbd798859b4d64a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBK6Y2552441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b0aa3ddd1e86e9addd680eb338e26b3ff852053090c4683beaf77f63900a03. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBK6Y2552442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793dad9d06feb61205c7641e9801053c3cfaa2cae0b201068ecfba024e5e1f7d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US83Z2421240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x039df64005291294e335bd4508efde1a8fbe81d22949c0e896bc97609dfcce3e. 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/GBLV62414048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde550e65161ce485afd87fe4ce7d38403a488025f062f6d7bdae85f7ec4a6598. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBKQU2489453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d9e468776bb2a9c5a3dffa375591bbb35539e926ce125a9cd5ac20e18bb7d37. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBKQU2479026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e16ff8c3f062a06d008823a1d64dd6021c39764f5f33aa8064d99fe29a9ae2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USNRS2443489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0133806989ced8c72b899b115d7e4a0d14b8545d6e28df9d161938dba3ca108. 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/USNRS2443593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74f18b53c081afffccd1dc8b81a900e3a2c3cd718cdef6eecafc8c012da80d2. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/GBLV62318454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d95520836d07e5b837b703787a3c7127db984ebf1b8b9115c2ea0d734b8465. 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/CA5KR2404119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02ae4155068e11696241bf404575b8127ee13b8174ea147c9a0539cd562d7ee. 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/CA5KR2404120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x470bb4a629642d9755590cddb0344a6c622d3690aef01b226f6f407b23a40461. 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/GBKQU2380757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f63e9f4aef8dee19b56e07136383df44d0aaa1935a8aeb4ca59976178248901. 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/QZWDD2304152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb58d42500f27f9b972ec437e086e32f50a777f8ad4cea1580e786822ebaa72c. 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/GBKQU2348265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe909bf3c630f3804f0f8f6a16980e2204ab81f4ad819f7c645169354f729fd5c. 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/GBLV62419875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8a0b81d9b431f0191afb961b55c31595ad8de7a5fd4f72f3112b895b269a79. 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/GBLV62419876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99eab9929885141ffc9e8cd40275276a936f53186a851f1d3ab0adde3e9d663a. 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/GBLV62419879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793dad9d06feb61205c7641e9801053c3cfaa2cae0b201068ecfba024e5e1f7d. 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/US83Z2421240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x536911b67182a76fab9937cc001e29b85d56e9e0fa3008057c0a34ca6e64a3b9. 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/US83Z2421244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5937e48c7c4892405880fb7c9ba64a815db8df1b0857feb912976f21e0af33. 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/GBKQU2489452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde550e65161ce485afd87fe4ce7d38403a488025f062f6d7bdae85f7ec4a6598. 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/GBKQU2489453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1df64b2b802df30893fa53799edec2a670fa9e67c2962f7d5c8fd97f975c423c. 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/GBKQU2489454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6abfcdcffa9eead9ee406a3cf45062b26aa9dd498009a1d42ad562d42b0321. 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/GBLV62414046.