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 0x785d712d657a52d956883e56d9fd2b0d25dc3cfd37230fb0b64390fd4b5c0604. 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/f8a4120c-b11f-44b7-8d51-813168b56f1f.json and https://artists.proofprofile.net/proofs/artist/f8a4120c-b11f-44b7-8d51-813168b56f1f.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 0xe401e1705877b2a46ed89c89bd1d3e0fef2b712259e703f20aa6ad2143aa4931. 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/DEA312200241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193e9622bb4ff7c479ea26a3e96fb3c3d5abb9b3e3ad278d959f12c6fa4e6120. 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/DEA312200242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7ee093025ad60645118e9f8626cf6b2b36dcbdccd56ac8b156d6d048255c2b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEA312200239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b6059639b390d9c802be611fa223c0ff2252934b446f51b0d120c064644f87. 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/DEA312200240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75097605bd36dcf82a8df1d01fa2b4362a14d6c6d9286e3af5a7f4062789da3c. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZS652185211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a91b6982da8304e58eb16c41f6a91c4d81e499ca8168d37ea686639549a86d. 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/GBEH42010013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8020c4e8a53845950ffda88d998bf9e9a2b8e99a0cce4396f05b91d2d7216a1. 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/GBEH42010019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9208f61162d42537d448b99700e429d031214bc72fd623ae4aedda0b4ad8ae8. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/GBEH42010021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c51492d635d779ce2db9834ce0f7d206f683e87d206d1bef814c49da4b1b12. 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/GBEH42010037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d7d2adc97da49970ea26862fe660fd83e2e241e1ded3dcdbcc1898880e2984. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/CH3132000879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15fc1050f70900757081f7da4924792aea18dc45852c1e648ac2c1bbef2744a. 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/CH3131914853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07435889c31a6de0cc73852804236863064b14c7e10e5c62fb2c5eeb5887cb0. 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/DEA312200668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be9b40deb490cb7b922865b3d74deff729311e3caadd61c0ce02df0706820f1. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/QZS652159679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2647c8250718aa9082b66a5294d1762481eac29caa294a766985b929e8727294. 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/DEN061902704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc15152d299902c1337bd2e3215b2124ad8376e779376b6a50f02735e862f5994. 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/DEN061902705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c40a827b40b545017508385962bee2ac1cf181b9cb274e1e49c935aeffb931d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEEA52001969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf86905b71899572641267bd91daf3883f1eca965b31b490865cb0dc38cd599b. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/DEEA52001970.
In the Air Tonight - Ampris Remix Extended
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f1e3bf2f4a9c6f1d855c2ecdb093918facb65b5acbea0b02b84192276b51bd. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/DEEA52001971.
In the Air Tonight - BATEZ Remix Extended
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x287f4bd796bb9bf98222796bab499cfe67e668e1860d5b45c90a94d863ed7c46. 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/DEEA52001972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x471655880d0f218acd64aafbbc196c9b6fc74abdbe0dd4e4a1d09d316fd32086. 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/CH5010900100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9961cdb46120738857c74497dfd699c91fa14def615fb290624dc35f6e725588. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/CH3131800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe66263bb15a5dee6d439032a6d1ea6e24c9cd52e95cc5949cae3cc73f9d44e42. 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/CH3131800125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc61683d80300c3f80780bbbcb657ba2aa58a5894d4cf67dd09e4c4fcc98055. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/CH3131900063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3378d7c592a80f5f639dbf3e9733cfaf2f938c20c5213a56785c87ea8dd1a801. 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/CH5011000081.
Loving You - Twenty Feet Down Remix Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002711cde0ca1bde083027fac741a333632f12652d99b20d7490d468cc795ed4. 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/CH3131900554.
10 Years of Sea&Sand - Welcome to Kühlungsborn (DJ Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd53065b411086fac4be876af6575b6a2160c205b8192c68af87b948a4aa0774. 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/DEQR41700817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd7b986ae53b2460ca303ad035afaab0534cf7c110a78a422140ba61b91f45d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEPI81403435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a03c83edcdc1946c7801a242454c1af75b3cc1cd2f71baaf263991c0ff692b2. 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/FRX281926301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b95da6933cc2707d29455a827f164f49d39ac2c26c9c7530f62ddbafee2bdd6. 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/DEN062100810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0184f57c5c3b387c15ea48000078bc623e2aeadeb51ee082bf947c30344c759b. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEN061002817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcafd3e667999e05f76b4563da6e996149f2cebc0fb30804219a411352fe0ea7. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/DEN062100813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c76ff1d64449cdbecf9b01d3a4808a76a896e972ac5e260107494959adf4dd. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/DEN062100814.
Kontor Sports - Nonstop Powermix, 2020.05
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea239f2cffc212959058e0ee21f3bf910abc438c64d4c6fd376a9e97d5b62bc. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DEN062003598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb92104dadaa1df8a2d10eb9509c3222f6ec3d239fb375ca021280f8d115e8882. 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/DEN062003599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x869885e302401387ee8a95713ee85b045675a43df4bb3b2db982acc93f5d2e6a. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DEN062003613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68714d4ce12a46595fc383e3f93083e4e1f097e4812cd8697d55bf2859eafeaa. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DEN062003615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945ec9e68344902046de9b587803ca7c3605b3855d4caaf4f6ab8dc4070e113d. 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/DEN062003619.
Komodo (save A Soul) (Karl8 & Andrea Monta Rework)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb02cb4f7bc9efc2b248adc0eb2a1c0704d4b8ae9fb3a35b3f8f449a7bec6433. 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/DEA312200852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f5aac6be1049834da06ab8257ced70df327e9ec250de7692eac4564065e240. 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/CH3132000986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e3bafcdf2d6cddfa5c65ea2b7e790253f5a8a9fa8bae423fd995724e5bc994. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DEN062004384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8bcc3d74c108d3895a33ad7c550ef8345f24bdef2ee79f3f6d8d4e2d855f83e. 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/CH8142000095.