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 0xa5062e1a0d0e4e893e1776718da4bed1523a168718245c1875492f57bdcdd95b. 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/36b479e6-06e5-4045-8e05-5978e7717aae.json and https://artists.proofprofile.net/proofs/artist/36b479e6-06e5-4045-8e05-5978e7717aae.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 0x500b8c591382e5f0356557bc70c5b32ce031133353acfc9c10f7b9d3ae3be2de. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/DEZN82529665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc182624132809805e9d77603c23f526e7401f6aabb5b80f119d8579526a227a. 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/DEZN82529715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1426a6c5e2d2ff9fd366a21bd83a135cf1867136aabf6dec9713f326c51644a. 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/DEZN82529535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5db1ed623c92836eacf95ec4fc08d76f7e9f7a87f41a26508acdd4db88b69a5. 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/DEZN82529570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe546645d75c1332f8500bb37e2705f094ae0d390bb3d70eb951a4d03cb5be99c. 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/DEZN82529583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb400793afeaba7e21236c84d7a89314e84e0ac9f6ec344ac1385534c82353f8f. 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/DEZN82529592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31153db6c19003749540efdb17a4bcc581647da810313a3d8c31216630dcda9. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/DEZN82529566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cef0fad83034efd29ad5c76a41133b041365fdfde7634c8fca4fb7f9a409f2f. 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/DEZN82529569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a277e8205b967791110d73a93a7fd7967c035edea6c0294bb5fedb3e2cb588. 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/DEZN82529574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42e2b7d1d982e8952176c93415b6c0562c9a31b4ed45089aec4402d4290a547. Chain 2 (Bitcoin): anchored in block 958602 (2026-07-18T19:28:16Z), 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/DEZN82529747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2827c62f2e9dcdc2c54f760b4097129e50a694ebcb64d9b2d6bd6dcbde4dbd36. 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/DEZN82529712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x223e38a2aae5161edad79e19e2220aa88969b1568b16aaf3abd301ba8f22b439. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/DEZN82529585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94394806a8a44e5b467f8a2309921462e3af3e22b65e7ea2d74be0f7b12bd2f2. 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/DEZN82529757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbda5cb1353591c83964613a785b408f93b07df61f3187373a93b35e7f7d4ad6. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/DEZN82529631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ec1fe8cf40cb1efbeed47d5c246dd985fd4aa576111b0eac6fe7cd4e04fb30. 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/DEZN82529749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5e1e5482efee107a63d12035121fadcf8a0702c8291c35baff7d25ade7ad8b. 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/DEZN82529668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1f72aa1b1e69e422e2bf71ddc98ce807b5cc850703fae721909cc3055ee60b. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/DEZN82529677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54c99373bd5119220f21c02e9ae737bb14868a7e5fd96e141dc056c4b3caf5c9. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/DEZN82529667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4a420429efd0415ec017e801940e3269f82fc5e9f85b1f2220f9953245e47a. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/DEZN82529556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f38b7773b5b6b7e74970a458488aaee15ba026004cdaf5e1e97ccb1feac0866. 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/DEZN82529767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5ab41cab2911149157f8f14216688e2810e2bea7967590486916957fca9892. 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/DEZN82529732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb015e3c7e37300b7c247dd610323b93f4d7609db5cff244335307c719a305555. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/DEZN82529653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d8c8c69ed44a40ff641c4809e2489388fbdf59795f3e289b5b6a7458c242bc2. 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/DEZN82529754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45bc3466ebba8c50e6dceb2e8f976de9c213b609168ecc69ef28718cfa0ce020. 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/DEZN82529759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a2f8018ea06923862cb5890be4fc0dac1ec47b14e94ac51841793204298e418. 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/DEZN82529580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x258de53fc781b771f17c3196debbc798f08a56bb8b55047b7b7cfce92a06d0eb. 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/DEZN82529632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed26fb56e369f426616a1b11bc3790205407b5502bfa31a79ae8ba7680fd800f. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/DEZN82529563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc052ee37f6b0a726d85d7c0504fed5d3fc0881ce426e6ba8317c9294f7a1cd. 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/DEZN82529718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0844a79880b9a36aa35a6968651d3d3e250c90875d527165068234b8b66520bd. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/DEZN82529610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4906369bd69bbe32cf28848a0ea0ff8c3bf535b65ec5f649d172401e8938fe0. 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/DEZN82529775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e25d596f91dabf8397526f97097be884f32bdc09732580a30c280d58ba67e19. 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/DEZN82529729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1bb9392aa547567239911a9a85d08f663b8928fcc98698772d5e1adb868cc2c. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/DEZN82529594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3dc5505c2c4e12b8ae31677e1ec97684049381984cccf02d06514a7310ffda7. 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/DEZN82529736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe69148b5bfb94352667797dcaf5b7988ec2caa22999fa092ad9713213e13ee74. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/DEZN82529683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1021859e8780713f573c7e77d8845f9995eb217bbe5c2efd2b7e70d698b1a548. 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/DEZN82529542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1336dc1f51ade0f0f17e1011311b3e2f8bf5997866d34f880c2cdcf8e8a67997. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/DEZN82529737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db40f65a063d3a7d975e0044bb93bcf11e9a87437ce5c3fe8b4b8c625897bd8. 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/DEZN82529644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8afa35882ff308b584b9fde7d801cb9ac29a4a1f7030c57174d07c678115fd07. 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/DEZN82529646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a629730c3e580e5cb3f1aaaeb07d422ce21bf7b3e2556baf6134ad5e85b507. 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/DEZN82529689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80929c64d829837ef1ac3a8213820320f50162c3d81d387fd65d228e839dc9f. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/DEZN82529739.