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 0xc269d0ad958e67a2d230987db263563bc5be76fd6ef9578dee66d4dd4c6757ce. 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/0ec9ad8c-12f9-4c16-b300-11adc4ef2725.json and https://artists.proofprofile.net/proofs/artist/0ec9ad8c-12f9-4c16-b300-11adc4ef2725.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 0xb4d0a4e1bb164ca82706d6580210c69a70d30371576011665f23c77d327ba29e. 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/CZA231500073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb575a30a291c8278e8b471c458d037e0a7624106eed97c9777c1f007b7fdd89f. 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/CZA231500075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f4d97bd997f2d30bc144f9829de35360e150a17c6f9b558afd6d4583b4a98d. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T15:56:25Z), 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/CZA231500077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0499df6c32bb589a8029565419287329550f2e92d6ad01cff768791b6a33d19. 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/CZA231500078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6806ca0f463533c0b681d04dbb8965c9a04e5b661ffbe9cfaedf0c0a0c6e30. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/CZA231500079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6003b55be9d0935f860f5deb47cfebf5ffa557b8206081bb4f8ea66d40457842. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CZA231500081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad75f501b91c53b9182f2af5b5d515eb29973bd5a37ae01bb71f5dc7110c253a. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/CZA231600127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5beefc12b307edf9beb6ae24019f2cf69b74beec02b221f4f4b2a9c8eb442f8. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CZA231700073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e4f1d3472365098870624ce571ac6523382004387a8d95efac88ea17c76a8e. 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/CZA231700429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eae6303ee08cf8ec63f0b8c06c9b84c8f1e3949721c6b6950bcc548257e0d70. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/CZA231800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc3c4c16dd41a36f2a79d6d2fb7ae2bf7c939db300f85bdbf0468190a02baa2. 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/CZA231800476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cae44a385d15c8c36d5c7a9b4c3909ed7af4f31c2c4ed9ccaf9bf764f6b4991. 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/CZA231800477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab6099929af1319027eabc34457315fe3f27217041df518eac958d0d564a4dc. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CZA231800478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408e5b2efb66b8ff34d61282845492bb1d9fa479e47fffd54083d3723f55bb09. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CZA231800479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0457663e7119fc190b4ef276f29ddce6725e42a2b4b7ebfbd48cafcee5e904. 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/CZA231800059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30f9c4ee2e39d16d8d82244658cd53fb1f027b5d4879015185d16e34672e876. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:38:09Z), 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/CZA231800481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc175cbdb7f827171f1d26d328675f61043692fa197d769b53bc26e1a12d8e38d. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:51:55Z), 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/CZA231900158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38aebc691aef25659c1ff1c88410230a20fb984da36833fd706a9496404687c4. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/CZA231900602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe329326b98c923a9c2038fca77c299b21637c23bdeac40e261d2f9c02a5aeba0. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CZA232000797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c04ff12fe978f7e29b5456fdc28ccbb21aa7f58b00e59b918514da01b092de8. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/CZA232001023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x034d8b849614d03b7091dadbdbb4b965391ba20e8f32a7e1451a90ff0cab0a1c. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/CZA232001025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ccc8b06a287a039e2aac5b6d75c7a943893bf6e04751df3ae26cd7a505c1c1. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/CZA232001026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed35425eccbe1246a6c383423c336bbffaea5272b6674413148c2553da57badc. 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/CZA231900183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe329326b98c923a9c2038fca77c299b21637c23bdeac40e261d2f9c02a5aeba0. 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/CZA232000797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf541afbd94650bd4e3752b06da69b935a3d991c73bee1fad84ce6c67882697f8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CZA232100935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa2ecd6a7f15c4e8aad24508aa032e2b6f1866bc54880f696da3a4cf29473be. 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/CZA232200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe055d58315faa6508a44a092477a6046505ec71ade669c3256a3811411d14a8d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CZA232100187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6953f539f92dc9df012da2770366b2994c1f0af7c1d59838d131743985cfc2d5. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:30:17Z), 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/CZA232200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54065f617e435b9e3ffb258f421fa9dccb920512e4946ffd8e3957171e8194b. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/CZA232100674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf541afbd94650bd4e3752b06da69b935a3d991c73bee1fad84ce6c67882697f8. 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/CZA232100935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dfc96a540950e05c7d649f171a1a0581f2a4f6881b043a16af07c83cd4319b2. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CZA232200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae177cdad125beb8f1796a836bc933e1b009a14d1a9bd20ccfe5f46494d21e31. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/CZA232200022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32917a5a0b887c19ebc28e64c2cbfa681279e26e9999b5d32a366df1553a24a6. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/CZA232200653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c6e806cbcbe9144a6604ee4846c932ffe27d903d21d9d8bf3491d3e688aeba. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/CZUM72201024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cfb745ec76117cd0da3cf07b98551bf31d695fc643aff14d86d64e4954fd1e2. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/CZUM72301385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9380f6f34202cc5b78ad28faed97525ab17650179e18f32fbaacb85645aa95a0. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/DGA052482034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e35130ead8a6ed570b1da929587e0246bed682275b220f2ead8c3472ca1d5d9. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DGA0P2466006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x667a9d47f71186c037c7473d115f911ad69dbead7cf7b20d422544773cea1d96. 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/CZH442500038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45cdd3855a782070991d383da4e6913feadc5b5374ee54dd6ef5454f3ad36873. 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/CZK101900022.