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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df63b4de83e1de681a08fcde5b44641fc51559a044d375404515ebf63ea99e2. 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/95a3f0b8-bae9-4a24-a684-acda59267484.json and https://artists.proofprofile.net/proofs/artist/95a3f0b8-bae9-4a24-a684-acda59267484.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a05491ef8b31c30d73a4ecd9f94927947148ebd4f245b231daf660a6773b6d7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ZA7HW2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3fae9c50a66351c434cc93c3e31da4203b3a630dd24d89784917c3e605550e8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ZA7HW2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c3795fd5eac8d14bfa79a59c7508883359685baec65132ff9ff1eaff6d4739. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ZA7HW2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ded20713b11e21a01b0ef450235127fda650ec796c2f35572a12e681d351a02. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ZA7HW2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x932b36bb726bc6bd45c665476998ae789d17f103c751daf81241d38070448201. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/ZA7HW2300001.
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 0x9db44c00cd254b8f404250dc709acc09759ea32972c9e14914efc2fa621ba903. 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/ZA7HW2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d399d02653aa526a3b79d723ffa3e4bd9ea42c205ccfbf6f3a7f28ef3d48fe. 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/ZA7HW2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb197a3ca0d3f7cb1be0ab19d437734971ffc38aebf2eaa7200c09c04137c265. 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/ZA7HW2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x063bdb792c31b54e91fb2a82d8baa832b34fdb22796d9e9aec5048f24cb3f10c. 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/ZA7HW2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9cf89a589a7525514041458055d2b9e288b90a867c3ff37be794e4765b7431c. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ZA7HW2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c67f33d68ef76e963010a0cd92145bd684ab8f08bd427f40bd36e8a76dfbf0. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ZA7HW2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf49ffb4d9f6d2f3e960a11fde232364b8a4e053d2582efad71b03a2140f7a6fe. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/ZA7HW2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x583f8b99fd4be4fbfb9281b4056c90798cf453371e5b341e658defee4b71f1cd. 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/ZA4EA1900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9576efcd8acd8fc1609c6331ad633324c7b99aaf345698e2c2fc2c389295f512. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ZA4EA1900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e85541d01c06b820f6c3da65d1888bd8cd8dede32d514665ad38e9b0f72c87. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ZA4EA1900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e167a6faf41fb912ff7a1b7234ef01832895669ba433df56e448e788a9281cf. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/ZA4EA1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85de5de23ded7ccbcd362782405fba695dd7d090eb08984b322d612141a4288. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/ZA4EA1900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69090eb9641b89493b897fb0a5881879157925e4bdcb74941520c6dd2f32269d. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/ZA4EA1900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5643f3d31155356c4aa6ff3d815e711ea6276f7ecfca3adb8c56fdb5241044e. 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/ZA4EA1900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ab9610f6d3e7ed7add0aac1b4262cd8a465242c9c3558a2cd2217db6bac156. 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/QZK6F2453827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d104a86c74dcc1675244bf3d0bca2e3cdaf96e1e7694e6f168ed984647e4806. 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/ZA7HW2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0509fb74f29626b67fdd366c001a4ac49a1f3fa0f8097ee2c75256626222a6c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ZA7HW2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd9ad541f471f3688362ee5a76802800a1128daa4f32be6ef2ad3bca6fe3fa73. 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/ZA7HW2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd07f3c10f9bfafa2683684f72b7624e92d62377ea4915722b714acea4ba4a5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ZA7HW2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7fd5e760215e84ce7bc04250e4db7f44bf980854c32270c67b19b708911294. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ZA7HW2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0ce38639ddf19742ba34c45b42f30689a377124ae275be41511ea99c4be19a. 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/ZA7HW2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21611ae27d80b57176915f93f1bfbb8f907bef3b6e9c4e397087366b9b6676e4. 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/ZA7HW2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee1915b62292afc8ff177414dd2faf48ba78e3bce66819040452168ebad5637. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/ZA7HW2000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d62c8352f1536c4e590a9f28ab959cc86a6ca2eeec887cbcee6f06dfabbf9b1. 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/GBMA22089628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93aee803162c7dbce60459772c1c984b3528c69866543c173aecb70dae5b6957. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBMA22089636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a66de284d227e98cad9b040878c2fda77eb2b6602f2252e55167a0bdb929e1. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/GBMA22089629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e47aa4309ec7eb1bfaeb42752c31bc210715f024e9d1ad5412e1f933405108. 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/ZA7HW2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df76459b319b8716d7db710cf646c6faf56d03571eda314dbe636dee75c26f2. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GXF9Q2595458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a70d39d1f66f05ae462353e7e70f0af9f747fa8bb54ff7de7d13e8237ce219. 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/GX53U2430536.