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 0x051ebea5daa8d2a0110c88236de2061440e4e80cec8f83dc0e933b7f5774930d. 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/9bc2daa9-1fd9-4bc8-b8ba-f901025ee652.json and https://artists.proofprofile.net/proofs/artist/9bc2daa9-1fd9-4bc8-b8ba-f901025ee652.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 0xcf443da132c9fd81088e3eed9fd76ad40d482a9567af4d3d76907590f863cfaa. 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/QMPKX1493904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a781edeef4ea7679630d6c4762f585633f1c86f03eca06645f1732cad3af33f. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/QMPKX1493908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6105af52a95cbb9497926f0b7ffd17436edad916a9229101d94b46b3c35de6cb. 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/QMPKX1493910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c6976b0421e4a4ceb2bd404ddf13b49057aacb9eaf9f8825d9d5283bb8e5d4. 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/QMPKX1493911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d3fe02c6374529fc7b2ad52fbbe301fb507dfddda057ab360c7ca80007105d. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QMPKX1493915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9884e36c89e7ab010096e33a2fb387cce2f6ccf818db4e3180104319afd2c411. 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/QMPKX1493057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237853aadcae6fda9b390edc4d92cc5d6edd0683e9a5ffd2d0a6b5bbcf303c03. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QMPKX1493058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa1fc7d18f0bb289023584eef087fec1099fbe38cfd72462c0751178f4c0707. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/QMPKX1493060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2169c7a74f5f3fb86bb4e47386ae224e8dbdc6c45176a3663be25ece218593ea. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QMPKX1493061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x909fbc35ef4d01e03b88e746c62a0804c1d8d92344653b7a11060dfe138cc79c. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QMPKX1493062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67ef4ee7d4a796eb5314d13955ca4e3cec4b785a93174efb0bafcbac9621ec47. 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/QMPKX1493063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33460a24856bb79dc48748dc9816c907952089de85ca590f2ee104107e76465. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QMPKX1493064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa5b78bc11043e8a9f06d4c787ff80a5a9b79542843d4a860c5dc71c70ae84f. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/QMPKX1493470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bcdb00dd5a3e27ed7a44919463b9822a3b68997615c22715871049026382d5b. 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/QM4DW1563345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd08bd469f8689312eb09d794e835519ad8857f9296444f0a13583d69478972. 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/QM4DW1563348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb645aaca7d5bf69362645d21eee3887f80b2ec579cae687b9062c21de6a8e5fa. 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/QM4DW1563349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f3044cccb0eb749d7d8d301d3973baa64517e73cef014a18bef48ebf8a4844. 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/QM4DW1563351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243362302abc952401a348da7320ded3713cb71cdfc540592772e34c2d2d3573. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/SE5VF1801495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b44bce186f7d1f0666b771f0e3e8c8082241f7bdead68ffabf0a43d04a4dbf. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/SE5VF1901622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddde7297b0d0550acfaa12d68290b09f18b07232a0070fc57e0bea0146cf45c9. 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/SE5VF1901658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3971d35e0ce26f6e6d7206a37d0349c83842585b86013283a91314892eae83c. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/SE5VF1901661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53fb23c2e0358a6baed262770183b648f330b98cd4106625e789a7406a7f7f45. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/SE5VF1901660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be64ef1d2ced8bdc06342974708ea4395cc52d190f5d3237e12b3a8eed70585. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/SE5VF1901657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc2db0c893c8e94fad4f4e07d522c6f755c67dbdb5feb27cb893d2ec0e3be96. 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/SE5VF1901659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b73655d755226cac73a9e2acf65eb3aac7a414fb473bc789367bedb5292962. 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/QZES62412085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb2398d2461ad66bbbc3605c27d939be03fa00957e94b688d0c2a2b6005cd34. 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/QZES62412086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa346910d6b133fc07842df98d09bd284784ce703ad4cdde26f93e903f78febe5. 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/QZES62412088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341faaa3e3f6fc55c74efcd9b4e7fe5936de940de31048ac8c463df3c81d439c. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZES62412090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd72543f6591168b757d1f2a6b14085252f9a8114175ffa430339042b3578e7. Chain 2 (Bitcoin): anchored in block 958678 (2026-07-19T05:59:57Z), 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/QZES62412092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9a891490dd98fe16d638acfbec8c7064738dc79d40e75cdc9922c16fca3c99. 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/QZES62412093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf26f6c22b36c914b423d2e319318ed2e51f701946160b977c1da1bcb15433430. 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/QZES62412094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x900cbba4238337954ba9a0e25d21d595da4641da5dd83ede5217c9afabdd27e5. 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/QZES62412096.