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 0x720c58490d9ae2e7725bb1bb3b3621f10c627d62182962b170fc445ddeef696a. 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/ae744c5e-4f29-4b5a-b4be-26e93fa30a38.json and https://artists.proofprofile.net/proofs/artist/ae744c5e-4f29-4b5a-b4be-26e93fa30a38.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 0x9753a58a887cd7338628587b07b7d003b0e97c468d58ecc99a58b11267fa3069. 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/QM42K2061213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca323d5b1744353f7c6ba1ab203cdb3fa4cf2fbb79be194220fa85148a716fef. 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/QM42K2005933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a83d73273aadd0a8f29a35b3a503d93841e64e59027638899c19a5739112862. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZHZD2195067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da93b994aef457b5eae6d08615502be6ac802fd960c0465f20043f0a3be2b27. 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/QZTH82136556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0211e536b8903eb6b72328d5ef0cdea90c406ef495eed02e5b98f8cc118757ae. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZTH92126120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8190afd45da2038de0c4b4ea489a8708d13b7c9b7e851f64f9e4a5b2681781ea. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/US3DF2272363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5536864e5c6cc779794db0482ce459fae7bfcd03658209fe910ba5eb2b9b15. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/USANG2245883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ff39fa22bb300760d4d839b3e1b25faf005abe8bebde690259d4f2b5c7c358. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/USANG2247688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc02a94a2faa920c05bdb0240c57d5180c0ef337f341fb05067ed13e0d4a703be. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/FR2X42378342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af2d334ad8ac712d525077ba30816595010014fb472b20de27cf7345d3d3009. 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/USANG2276531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34bd73aa4476512dfd0494883589c33464e2506b1be2f4476010a2307b19f09e. 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/USANG2280242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x856db12b37ca72c6f9f8adb3dd086efd5508629756c97d81fbcb0e33f29a3330. 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/QZHN92313191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f19a1f735b71babc8e9bbfe4c0ab5b8f2f8ca73848c0eddb9f0db003448b372. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:44:25Z), 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/QZHN92312418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb66b8be4679d82fdaa63341504fb6634727bcf3babbe0e2c10a5b68fcc39c846. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USANG2294916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6227ab3bad83b2aae0673376458fbc5e0bd3865c0cfd0ac450e0dcbe58cda96b. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:51:08Z), 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/QZHN72353448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18e784f3836eae1c3076bd946d6bd162577df3968554a33e15a8eca2c4301f2. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/QZHNB2350741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa656f547baf3cdf51b3d873ec7cccba04747374bcd92869da1d86a590ab7bc87. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:06:56Z), 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/QM3DF2244383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6669bf4cb0cd06d214c4ebc27a9fb6394a6445934a48f9dcbc6d09ed69235b0e. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/QMBZ92345761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3c867d6a82cd38e2ad51c4c1efc0f0b4f32c3e92ea5b992e164ec19cae7952. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T11:00:09Z), 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/QZNWW2375111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f0fc203ab133c6bf1512a0e3abd6b683e1697f45503107c322e77b3da4886f. 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/DGA072301514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d64fc5597b49ee9f21a978766d2ec4c6750d626893fda55a764802966fbf85. 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/QZTAX2380274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f6c25188dfd77d4fb735f5eb3936019d5bb91e3fd8cbb7616dfeab1a95cd684. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZTAX2380275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df049d92c236ed49f996bb8966d82e7a0ee147e00a071b96af6529a05c97ccd. 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/QZTB52319623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ba0d81ddae16bc4c21adbbd758176d58593c6afba9765db0ab0e2e99b33c95. 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/QMANG2216616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1cb7ad7111fae637facb816e2d84157eaefbba3de55a59fc14c4732489829b7. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QMANG2248560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44f49016520b30be74e3b239f38f4fcf6658c0c8f99be559d483c5d0b20339f. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZFZ22454235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f20a4c1e0c00cf3fbdb156ebee23fc35b31311860d812836179dec21c76237. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:08:47Z), 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/CA5KR2424432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e9a040f75c9d077edfd01e7308c9fe0388d9df137a1a30bf0773dcc106e0dde. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZNWW2423897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1f3efcc94de746aed1e0819281fab54007b603d0f6e6f22c13e9b6b87c21eb. 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/QZTB42436940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df8d960a7a87117344b61404f9107a34dc5b32a3fccb635344e846409d65b00. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:58:21Z), 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/USANG2427044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976f6478b85e49d907ee8b8257f58d29efffb8d0cb3bf5010f4803d30864ba98. 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/USANG2427043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd365df5ec9bdae9ff1c2b8204d5f1fe94adeb86c47ec6d34ce2417856a00fca4. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QM3DF2268101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c1be5baf7ba608089b35dfe66297c7c660aaa5545da7543704581378b2aee12. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/GB2LD2510146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49303a9160807eb7c16d46b897c44b212451709ed9ab7553857369a5c4549a97. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZTBA2539694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f68ad41a85ee4c424db187e23d561023435c691f44d79d18fb5ab552ca8c9b. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/US3DF2590998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9927c73fb369e7c0894fa5a102a180b9f22c2e592e499f8bddb581b39b1ada1a. 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/QZ5FN2476613.