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 0x428eb15b9dd0f66ec1c205610df91167231d45d77d1ec917d5939b620d43db8f. 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/879a7e95-9e7a-4c0a-91bc-003db6bcf416.json and https://artists.proofprofile.net/proofs/artist/879a7e95-9e7a-4c0a-91bc-003db6bcf416.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 0x4bf585e4b85ebd54b238baa5104bcdd5ed708bb16c30efe82a86e0f1e5b2b5f2. 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/QZHN52194904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb101784616f9853401491ef6e41845b4e7ce706e6ff46d34bee39ad82960d985. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZHN52194902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb101784616f9853401491ef6e41845b4e7ce706e6ff46d34bee39ad82960d985. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZHN52194902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2afc342d49933a1b2301dfc8eb8de2b24f9e7feefffe64aff50cfe3505b20ab. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZHN62195726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2afc342d49933a1b2301dfc8eb8de2b24f9e7feefffe64aff50cfe3505b20ab. 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/QZHN62195726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d51e1d1149c12e239c57d633a122836ee1f874fb572994d25563a30c5729cc4. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZK6Q2144148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98dfebc43c51369fed863f7ff5bf1050e0f071af304af812b7271cf6498eb389. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZK6J2165087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a702b5a97ef38798d03f192d90c3e37d279e2ea7542f1c0cb2ccac7caee96a. 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/QZK6G2124535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf13dea8cdf0793eb51626d5996868cae232c5b0cb558beaf19bdf15def60aef. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:50:32Z), 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/QZS632121840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c683c415dacb446c22e8b26bd5ddf81b47dfd437dc8a61bead48a31a829ccb5. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/QZTAU2176317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a47027d78a76e1a2c8be17c90da32a957371ee64b95d6caa4255c5451e3704e. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZFZ32217286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a47027d78a76e1a2c8be17c90da32a957371ee64b95d6caa4255c5451e3704e. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZFZ32217286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x805ea88ef91f39c2f5ca68e5401c026ab65a7946cf7d69a936e939557b7b8313. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZHNC2289011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ec02b431930af9e6f2c0245c358bdc7f7a2f30795f9928959c57ff58980a19. 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/QZMEN2235734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacca67f328720c2fbda99588f4616560e7fb372f11f6251d4f0e8230b5eef2ca. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZMEP2204111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c4136b219ea2ed92876c98ae7e3dc7e10e8795ece6c7555714779c24fb1b37. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZRP42234601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c4136b219ea2ed92876c98ae7e3dc7e10e8795ece6c7555714779c24fb1b37. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZRP42234601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa1e1006b0e2b89fdaf2ffc84f969c007371f46b04d96246dc875ba840ef73ad. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:30:02Z), 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/QZTB72215242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2912f6e2fa1b493804b4492001035f967d1ed8113a3b62e383fffe536596c250. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/QZTB72215273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2912f6e2fa1b493804b4492001035f967d1ed8113a3b62e383fffe536596c250. Chain 2 (Bitcoin): anchored in block 958117 (2026-07-15T10:25:35Z), 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/QZTB72215273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171706f452a1d323d199485a345aed24592700d0c15b02991ee2c2fd0d62730d. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:54:01Z), 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/QZTBB2241427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x067399e7a55a83660bf3fe113343585addfdcebf2d160a8bb2f7abc0b581a9e4. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZFYY2346538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x067399e7a55a83660bf3fe113343585addfdcebf2d160a8bb2f7abc0b581a9e4. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZFYY2346538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeffc3c8792577e32d416d901b1ffeace9a3b9829f625c232178215c58627b987. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZES92363270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560a4e8499bb986fdd1e62187ed03110a682c13a52d8e6d967f94c5749309516. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:53:20Z), 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/QZMEN2360134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d315df9448aec1ce3fedb8f8f8f06a28e7c4073ee65c199a671a3fae67f1a9e. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/QZMER2363814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13bbd74d71815a26b91041a6ccb601334f55b146d2ab64ffe85e3a8af802012a. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZRP42310848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff9a86f9b961c6f72685d122304f4247a97bf2585acee1d3563a002a7519200. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:40:51Z), 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/QZK6P2421607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1782ebf72c55ba67fffb83d22c29702f91d9f82c6ef8d78442b0d4bb2afaef2e. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/QZK6P2423365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff9a86f9b961c6f72685d122304f4247a97bf2585acee1d3563a002a7519200. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:55:52Z), 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/QZK6P2421607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6253c36076c1a1294f39cb250c9f61bc160b6f16661e999852c3a82026f2bf75. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZK6P2422562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de1d6624d7ef61466483ed0fd8e1d0e0192dcabf7c2b7d1ff6dd1e51f0810fb. 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/QZTAT2486648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500cdaa3eaeb808e03cc7cb308373e41a38a558dde3bc8004e58fc734e1e661b. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZZ7N2581659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb808cb2ccda52686ccc2e8d3415567fb78462a1f85338f973d664dd16bfa421. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-07T15:15:30Z), 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/QZDA62393636.