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 0xc45f7880a5cb8d0854b3445c1872cb8423f9ce375610556612b72ca28eb21b08. 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/225a20ac-5b94-44e0-973e-5ac7100f7b00.json and https://artists.proofprofile.net/proofs/artist/225a20ac-5b94-44e0-973e-5ac7100f7b00.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 0x9f465204a82c80214a61e70938a02148606f759e248e00c9b60fbd2606a43308. 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/USA2P1828709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb95cd4053508d64dc051f6bdd3f5b68b948a67612a288e7c445d27cb52a2d1a3. 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/USA2P1828710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8226e4dad9505b51463dfbce247804cb340245852a8ed37be27e0e9f5b4cdafe. 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/USA2P1828711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97bb141b0040637a5c16e940c76c6e206ce28c6b31c8d8c81ae4262ed240188d. 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/USA2P1828712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc576edf9f547b4a31bf195bb67df36d7b8cc0a3c245d91f7d67a03378c397221. 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/USA2P1828713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b09e98513d661c8a707d0d9dd4d93d7eb5e4a31f266b782ded8ee58770bbf3. 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/USA2P1828714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11cd998d32829b6b1250e99de582106a64e852e9823d1f53454033d3538c751. 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/USA2P1828715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4901899a77b55a910aa8d9a6cc951e2273be5b10335af4cc39598ffd99c0d031. 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/USA2P1828716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f5fdc0be9fc094201463fb725eb19e22e6408fe3dba49cdf020b4ef26fdf47. Chain 2 (Bitcoin): anchored in block 960155 (2026-07-29T22:13:32Z), 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/USA2P1828717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6b6670ac7e0b9876f04c10590d44c83a7cbbfee57f04edc0d1ef437136b131. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/USA2P1828718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605dc928665422e9a36ae0cfdb2c2f3f3d4158c357bdb3c114f7bc67ae10101d. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/USA2P1828719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29631c92f9d16b57a54c7b77ebbb07345a611549eb3977ee5a9e8d0a759811d5. 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/USA2P1828720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe278eaf87088db88025ec831a2e3265c86a356684a2ba432bb6ba117bf09e5cc. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/USA2P1828721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x634fb51ac808f0cbf6fe9a400b0276892f6f06abb8095ce0311eedfd4d8dd1bb. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/USA2P1828722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e8734b69ce86d7e8b4f4be81ff9e821ef3bfe2e5bf04d40adbcfcabc14f429. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/USA2P2120660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0add2062cf657480f5f34af8e619bd2f8bc103e1c973c75e8bcadb814ef4c2b5. 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/USA2P2120664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd95794bad5d95aae79fc3412df936efc2e5d90b76fd9af22b8da40b8317aaf20. 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/USA2P2120673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e1c7258bbdc61bf732679abbd4c78e384ae0151aa98ef8d9c7aac265bc554c. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/USA2P2120670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdccb209dfbb41a6aa9aa1cb0aef92750b0eab46449e3c559d45e9fc0378e21b2. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USA2P2120667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad33ffb71bd405b52db66c0530e7501fce151b9616e773e1d5bd7e6aebe6c1d. 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/USA2P2120674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea84ab7cf5c17eebf26f1b60052466594afbf0eda76aabf3da1c36439f5d6d9. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T13:39:11Z), 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/US83Z2430551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea84ab7cf5c17eebf26f1b60052466594afbf0eda76aabf3da1c36439f5d6d9. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/US83Z2430551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d1b6b2c9872a2bd96a4baac760c0c32f6da1e0ca2ed429856dd5be5ec1fa09. 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/USA2P2503745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc152f231ca8cb1351136c3f6c270151862714caf27e85da114ade731acf77988. 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/USA2P2503747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac22e48b44686518a3cb4589ff913cd02c4e68d9fc50ec8c890d5096f718962d. 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/USA2P2503748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cad77701fa9cf5c1da72a5e59f635d44e23fe6bf4f047a5f2582839714fe0a8. 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/USA2P2503749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd622abfe9eead4893b19155d4974caf6cd611f5eaf47b94b482554ecb5fecd7e. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T08:37:45Z), 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/USA2P2503750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8275e3ee5a92a604a6d35b26830aae52758d696e7163e58d79bf8feba5f0af8. 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/USA2P2503751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a3d4b51d643900613c2c6c2cbc421bf522e792e0197abce02a77096b6664bb. 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/USA2P2503752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e4f20021dbebb06ff674d81e261f1e327b260444496c2efb305d570288ed9d1. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/USA2P2503755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a5793681a6568221e07aaf83aec68b5fa2720b992a9c0ca58e8ebffdcba7bc. 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/USA2P2503756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6eb6b8b235dcc2521e5fe0309e430d95fc971a7414b55da1c372a99f709896. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/USA2P2503757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef1fbf049594d72c676b3a4b835a27c56bfff414e7b0f1d7bf92ca2629d62c5. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T12:33:53Z), 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/USA2P2503758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf92077d273b0ecda2d018155e21394214c124ce551cadf31f7e4c3d50ed75b. 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/AUZR10700572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7706f759a925afc404cd5137889eb435399886ce72216f10601985d46f10bfb9. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBKQU1840108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6834bb8f1edfdd0c4cd1782e778f5f1a93ff2c8b9c244ddfa5b8ee566ab42b45. 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/AUZR10700610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0040884853a60ca659a53785282d492dd4b44ea6c102d0f000f012cc2f30e2f2. 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/AUZR10700611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6861e59b461867136c4bfb488564d66ab329303b119a7eade2361d315c4f765. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/AUZR10700523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c622cc81f2bd7b730d3b61a140e49bf793441d8d411426551bb4c35dd4d2e6b. 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/USA2P1815633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72983058da316c8d7f2e1fbdfb280f0a714d5db9995c9a417f7e173954eaf36. 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/AUZR10700640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90812d23b1f0ccd8a4f934062a3550a5147149ef5eb874b9a3c650a69c8b0e19. 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/USA2P2136352.