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 0xfd5a2c33804b2d8b3eae16ba40492735e2e0c8e88b1bbc63e41760f5f9bf7035. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4ab04459-bf4a-4da2-a839-5a083e8cf2a5.json and https://artists.proofprofile.net/proofs/artist/4ab04459-bf4a-4da2-a839-5a083e8cf2a5.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 0x47ac36849b2de223aeca17e83e0213dd331c6d77383518de54c8734fb44b5493. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZTAS2250348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3188f5a28e9d340ba2d647be4ffbb74d1f3c4aa695ac35467396077c382377. 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/QZTAS2250351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b634cd3ef0f73c503e93375e2af6956b4b7e715f8d23f80f32d1cc630d86a0. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZTAS2250354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c76e44a08174f0f3a8b70b2e9df283f4b9edf35e79a17589337e392a5334481. 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/QZTAS2250355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf6587fb973d1ee0a537307f0066d77af2f326cc29e625ca7ce05cddc5775b50. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZTAS2250356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348a5463cd207280d3dc40fdda9b8911d663658a078f38c50aa9f18e62e16a07. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZTAS2250358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b26edfe981df65216af387c0d10b6e6e1aed107c2ae0c0b9e3bdd5ac63361ad. 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/QZTAS2250359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1fc215445d7c8fa9fc934bb46da0b4b3bec51caf1cc218d077f84379469aa9f. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZES82339139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50d8c79c6bd8c0aaf5a537290aa67d63b094df7255c14bdb61a45a9d29a771e. 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/QZTB42330634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddbd5f04b1658072466ee29a5ac91f63c1feeecbcd4d648d4409ecef32552ab6. 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/QZTB42330635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2022d0545bb8c1d8b604e3a78fc5276b0fe2ace9b0365cfc28f5e3217f313bcf. 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/QZTB42330636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0644b09b4ae44d4d98142b68214f0ca94407f584b0d7f5e3c4581329617521d6. 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/QZTB42330637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x067ed416de79fce0acb4d49cc7b560645683f2ce9be9e9f479671877c2f6713d. 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/QZTB42330638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de221d076cdd03fd73a74626c5df75596b36b768f448cf1bee7f3bd6e05b5a4. 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/QZTB42330641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x891fdbc45e86702002bf952c09a222acdcbebf35796090ab647001ab61e7c1eb. 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/QZTB42330642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf29a82b521183a89db2aa9bce1d6326d0f74354d074a0338fb7e2c7eea40a11a. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZTB42330643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f9c79d8745ddddd16fe32092f07e39c4d6963af221f78836ce7b9cfa39ec4f. 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/QZTB42330644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab533151a22e6db73a42b5d7d9c9265b52507ac5f994e5ed909fd2f2f5c8c96. 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/QZTB42330646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086487ae0bb06b69fae195228c35d685bfd5a42f688aa1edbd4432ed4e3eeffe. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZTB42330639.
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 0xac58dd22ac720c81c1aa2626f3aa135668df1844b5fe6537a368fd00a4c4a133. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZTB42330640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce3bf32631d309e7624c4e46c3a0130839d6612dde28e10c6f3d277e3ae6537. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZTB42330645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc265f102ed781d819d1ad1407b5d9d627f64832c9fe220fd4509558ce0d3ff58. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:04:36Z), 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/QZES62439533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3776dfa264ebf82d1c53895d2e6fca4eb188372eebcb07b66a0dee877b9fc62. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZHNB2498176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ee96b15fdc025b0957004ba8eca7aab7649fb6cd85ba3932db7527a0505d83. Chain 2 (Bitcoin): anchored in block 957838 (2026-07-13T10:04:52Z), 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/QZTAS2432662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006d2a2f6ca6d4a3f7cf72a78843ef2ad1fee273ba9b3e51526397f43d9f085c. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QZTAS2432663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ee7826ba95dea86392b43e03e409ebb0730c238c5b2de212163dbd943e2ba2. 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/QZTAZ2432095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa00d23a0c9d86351934e14d5079db15a4d1495d975324f9a592aa02ab71ccdd. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:00:27Z), 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/QZTAZ2432097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32070f179c2632d925be8abcf6f390226d9fd05850141c2adc28a51fcd3e4bcd. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZTAZ2432098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd5e812a1e59196e9ea0cac44e2e75e07e3eec96a78378447e58fc7f65f38b2a. 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/QZTAZ2432099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7af51c61e6c621aa52e573b684c8eb21fc3f647c38c439f1ab82ed056c081d. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QZTAZ2432100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cfea20b8c5f56ee981243cd5f8a7b8fbad40f694a560ebdb9fb2319658cf1c5. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZTAZ2432101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d7e3a2335ecb1dce06aa07ad8559e999b651823dd3f057567d48fec811e6b3. 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/QZTAZ2432102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7421bcd0c4c531492f412ea234445d74110848e8881e91fb888cda762b2e5975. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZTAZ2432104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3bd8abd35c8fdf24ae56470b3133328abc40884caea43159805566e172f462a. 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/QZTAZ2432106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66236b18d91e2b63c658f2ffd05ffe37287d6028be645d46c724e2171d10e18c. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZTAZ2432107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce1e5ffcf4e259bab49f86b994361b0de0f60e3857097c7f6bd3721dab8b6c3b. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:50:44Z), 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/QZTAZ2432108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726a44aa93979ebb66defe011003941b7926768026e9f90e6695bae63b69c320. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZTAZ2432109.