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 0x6b318ad36e52cdc1dd41f696a36a8c1826244ebad84a3be47f863c45a519f771. 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/835c8cbc-035e-4a0a-969b-8be2bf520d9e.json and https://artists.proofprofile.net/proofs/artist/835c8cbc-035e-4a0a-969b-8be2bf520d9e.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 0x7bc5232b751d0f59db99831ee40d6006c8842744fcac590eecaad20679f95f67. 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/QZTAT2452928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143c42a1e6cd3393d3f0f370210dbdc85f002f78933d83cc8425327f612091e9. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZTAT2452929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92685fc9b7e1658affe930a43226042bfd2859bedd91dfb387a730c5b933844. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZTAT2452934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237d96f10de1b3ae39f09d3d8a34511e59d0d8c89bbcec0d9b7375fe473a71ba. 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/QZES92449721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc801e98d6fb95b1c63be5b9510a3dfc6d04651c1fda967632026729cab6ecd70. 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/QZES92449722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162346e5eb3e7a70bd953822c653ba8750e1ceaeaad5d855a5ff11ce1d84c1d7. 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/QZES92449723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55efcf2b09e259dbf5a916af2b6c959cbe3917ddd47644884e1bee333f41642c. 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/QZES92449724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5abe72176769f3d63ae4fb16628ce9e0240d7010dea885de98e5ebbcefd2aee8. 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/QZES92449726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2834f34788af85679ca65d68acbfd96cba88f72585f5f80f23e09a983586234. 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/QZES92449727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18cd82a82e2ae8e7c0616a7a306040590c6371e4de4505df6e230e638c60c02. 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/QZES92449728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8213cc9eab6760771a1c57017d179b12885faa5963a03c61dc78d660a0bb3e20. 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/QZES92449729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9cc8f8a83d0f232995e81adf37fd6d6b5b27c8b0594815358a6574884ddd6fb. 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/QZES92449730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x434d44d0210ada2ca6f265c6c8459fc4d2623b766836b1d7da8e3859cce442b1. 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/QZES92449731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54483a7b3ae87333b898df6e0e5696f2f1d7884f2e70af73a8aa93a305a5d1ff. 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/QZES92449732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7fb28149a25bd7534989cf0b3283abcf2dbcc33804b279202c0d19d8e4532c. 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/QZES92449733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e05c99da5585584e8d3dabd4fa241ecbeb019d9cb1919bdc73b10b1f759a357. 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/QZES92449734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e46e76ddbfa9729a0afe4d926a4aae672d9b92d800429ccadfc9682da57a90b. 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/QZES92449735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8cf3e8cfeb9e78cb83e2bbae73491c0df502a6d25d2fa2d39b1550a071c3854. 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/QZES92449736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad9ba0b8566c2aefbd36805001640da6b2d6560a9367d99e91dc26c6c63aa99. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZES92449738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55cb431dc1942d76d01ff08001e3a5dff0ec7ff52fc15d4ff7eaa0a76b2ae4d9. 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/QZES92449739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d14388800e9ab4e7a8df83e096250890a5e6a6de897b8fe2e0982c2740c2610. 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/QZHN52427612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a4ccc57aaf671fb757d6a08f11b9a73d4df8381afa3388c14fb7ec871c0471. 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/QZDA62475489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb2d5e30274770ab4d03acafbb5930354c7ac9ac1e5f08c23595284324f6871. 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/QZDA62475491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe296ca46b1c7c17fe469a579c490528683a788f3a4507633e04036efd0c735ca. 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/QZES92453263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe92f1e4702496160ccaff0d039fe12227c8882fcc98ac48b913123c844a559. 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/QZHN52427613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ff1c0341b976a2c0a9b57609c72a6833e4694f8c0794d0c968fb33e760e545. 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/QZHN52427614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe296ca46b1c7c17fe469a579c490528683a788f3a4507633e04036efd0c735ca. 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/QZES92453263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb2d5e30274770ab4d03acafbb5930354c7ac9ac1e5f08c23595284324f6871. 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/QZDA62475491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a4ccc57aaf671fb757d6a08f11b9a73d4df8381afa3388c14fb7ec871c0471. 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/QZDA62475489.