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 0xdb1aca65869de972c83eb99b84d5809de520d746212db31473b65bdce0c30794. 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/09a7ee45-fe03-4208-a5b6-7f6951298c66.json and https://artists.proofprofile.net/proofs/artist/09a7ee45-fe03-4208-a5b6-7f6951298c66.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 0xd53102bc82cbbb61aca878d9052efa8d4441907bd750ee4fb96ba98dc6879aba. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/DEH741810947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6999896fb9310fa29afb621cd85ba5ad658c8e91dea822508b1f3e3291c6539c. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/DEH741900517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34633f7c3bd48e04f25fa5f2b1214270b5fdd333fde3be1dcfb32dd21e06d8b6. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/GBLV61924543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d3f9379f231c60cc7dc13e292d0a47e83ac460924b3751f6f949fac92f585c. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/GBKQU2017862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72fc4601f9f09d1faefe6eeb751c82f9ffa19a3469affd87244653fc550fe1e9. 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/GBKQU2082241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f46ac8108f1d76f02615ddcaa3ce57d7a9172ccdda8be33c9f410b5c0b44bb. 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/GBKQU2077296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ecca8228a0227371a4c76786af0bfec65d73a40ce788fec19e326281301b448. 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/GBKQU2077297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7586bb72696e5fcf4e4660f2912950932a6635b8c719ad3294a9df7f95c95165. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/GBKQU2094397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a6886c1ab1ef24305e7b5a1dee8f8a7a1552f2340e6f3e08836a12f64568d56. 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/GBKQU2110666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4456addd5673fad441cc4655bef7464cbee47a4e44707ba5356ba5f4f5c8ac28. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/DEH742154917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bf5cc9c9a6cee2ecbcc7e1a060f424e9c44b2a4c6b81ae1564697993253fbca. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/GBKQU2252829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4216f753e94a32ca5a513f42c29e310615a3d3eddf93f6580217a89775ea02b. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/DEH742224648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323ec2c348b5ab3ceb9490c65ca780904755536b144cb0a3ec931269ed5ed62d. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/DEH742227338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4888e24ae78bf43c0a08bd52cb8031ea6eedb2d51d99712b6803ee07c9841ba6. 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/GBK6Y2251571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd162c9321f8feffa9d71824037aaa87591dfc2565ce593883c646738bbbf720f. 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/GBKQU2322801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe40e4056e61910d4e40adab22d99db6e68a2d4b4ee1cdfa71d9f207357f83c8f. 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/DEH742327898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c5b9f2b0fcf45f03e2ac1e17c46c53215f0e813f4a2b14f89a4ea52e230977. 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/DEH742402673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x464d59efd7740de8bb638162f60f0dcc2ddcf0f7d6c93872a0fcb63a435405ed. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/DEH742423991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd401fcd38d776764d389fb75e520b0fadf4b4dd5e94d68bacd112dc854600b6. Chain 2 (Bitcoin): anchored in block 958117 (2026-07-15T07:36:28Z), 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/DEH742428311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1644fc1cb910e3ec9ff2861609c3c8476708d5bb681df0cf0d8e4f66cd6335c2. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:47:37Z), 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/DEH742435085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ee9a15e62262a43fdea53d5104d56c0422f9b5ea0311e65c24b558c5fe26f6. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/DEH742435086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26fc079aacff0be418659d7ced667a78dcca6b52091dbfec5ddf0f224e15f6a8. 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/DEH742435087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce597ad0245b8131caf1138cd60e9237487bddc5a812e4c361b950c6a7047a6. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/DEH742501128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe451af2d795779f10f6b9776135d7d24e9c374faeb68efb63a463d22969c0159. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/DEH742501130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b630af8b059660562e328efdca8e1e77ee2cc344188a7184fcfe9fc8925d213. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/DEH742501906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa314b2bfceeade87771e16ccc8fb2a789b46e15c48cede6b62b99af3b179106a. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/DEH742502253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b3f0160df6bfc9b53bdb263aee75867f9d613564de435f0627b05292a89de29. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/DEH742501135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80408df8f03685ba9bc3767b9291cb94ff5e79f14c837c3968a76279b5bb1818. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEH742501268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8db85ab22ae5db6d55fa45a36b154d82f371e1f40dff65a013690e0ea3d3cd8. 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/GBKQU1928739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40419a976f55f0db914e8a706c2a69e3c4f04e8ba6c0f3de6c90de2c9546b3e. 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/GBLV62028303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf541349e1c78f7665e47f792d62f975526e0a2c7d6c3aab72299e173e22c8458. 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/GBHAD1700179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2099b1781a409b54f3e48bcc0143ad88109025bbbf77ba0a4ad1fc1cf3aa9e5e. 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/ES94G1812622.
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.