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 0xee861e782111ba62cffa4c10627216c2bd45fd537ea2fbd5409030f06a686670. 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/6d4a229a-3fbe-4d9c-88a6-9d33e67026ea.json and https://artists.proofprofile.net/proofs/artist/6d4a229a-3fbe-4d9c-88a6-9d33e67026ea.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 0xdf667d8279b84b8dc1992447ed60bf2a68413ffd510ef3fe2b85ea87e3944ae0. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QMPKX1889402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f72de11140f054af39705da10a5825f733bf51b0e188ead2250d8b05be35fe. 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/QZ8LD1938880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9302a86343206cd5b8b5090d2a1c88be268b36efbb2610cfb0c1ee8836a1f5. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZFZ42038516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb44aa2e3c9cc8205e929eda3419d8825c344c77c416bd06a91335331a570b1f4. Chain 2 (Bitcoin): anchored in block 957596 (2026-07-11T18:43:56Z), 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/QZFZ42038517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71a45ad138507e11b8afb8a8d03997f74a9d28c58ed1dc75685f1c00f980957. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZFZ42038518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b0287a9d050bdab47c303b5f9804369ad6d876ca179fc6adbe68b11840368e6. 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/QZFZ42038520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b4c7afd68384e609dc35604273283098f1406fcc2354b487feb54d7a551ce51. 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/QZFZ42038522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d893d186e9451e3d9f9686b9adc6e4f50d1e4cb6fe6e4a57ffc2a251829146. 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/QZFYZ2140301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb65b6b48935ecc6d242ed35a78b453187801904df56c49bd27a80bb36a5d8d18. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZDA52189062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2944a92f9e6c65cd1220cb4ad3c180ed7ec466eef61ed8bf76653366bad91809. 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/QZHN62181183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa078488da29959a9133c412125d3ec14f9538c7c497e96e3530d90d15923a908. 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/QZHN62181184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb8cd174dcfc68c73633ab2c10fb783f8d64ce5d2dc1e3e875aec071d59ce1ab. 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/QZHN62181185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecfbe76e78321d28d26b4e26cd5c60431f8d62720f995d83859cebac8deb734f. 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/QZHN62181186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bcfb9875c48d77c8783c0647cba606a2c514f51309ed29a052517a3d61759bd. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZHN62181187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7c6fdf60edb4c673c4dfeea0f8813dcf838688822e386a929248edbcce8aa8. 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/QZHN62181188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5189d3bf4553e97b9766a0a01033095cd8ca65480411492ef4abff396b29a56d. 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/QZHN62181189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8bb9ccaf0f0a75df3000650e1070126dbea0efb23ce95f47e494c330ece08b0. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZHN62181190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab0373015b8b462d2b7f56f695e735b9878c06712a6ae94578a56a5c62f61c9. 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/QZHN62181191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c0fc0d103cc65ba468d466478a9844b3a05f85a519d678161968b7a0f9a471. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZHN62181192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc11d6505f393ddf35f8ead1ebf9a37e0f93a2433da33876b6ac2ea73704bbf22. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZHN62181193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57574bc24e51aab895e9716647e7fdbcb77a281ce7b06d2fffbb5b72ac915eb2. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZES82293384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c3db549e346b88856ac2c46274b7f821d50baafcad6c12bc139b22aa1669d1. 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/QZNWX2267680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c463b2f906d371486bfe94fcfc24031f3aa0f72b482c8fd7a8c782494e6c755. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZDA82376831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2524f9e6e6823ea541fe182d189cecc144ec0f060bf01319ab60fc048dbe422a. 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/QZK6N2397493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185fa246c3439aaaf4922128e79fe0e6726f5a1306f2c48201bb56fa63d0a2b0. 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/QZNWY2391567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca61a9b02596dbf93c3c50adf62645b7663ef05d3f5722cc75038ce318a4172. 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/USL4Q2393675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fb810cc8f57cbe13ee17489dcf90613903ff09fc7af23beeb569ee8c382cb1a. 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/QZTBF2365326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0e4b2e3f1743bbf385bebd1085e526c3e20d8ced73b265c6ad47f6a37956e3. 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/QZDA72493534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dee3b5f8692f02fb1cb44fd3de8f363e2baa41c44d283964bfd1f2b4a238e13. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/QZK6P2461568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b2a737680ea40d7ecd860fb37d8f9f4c21c52b7dcf5ad49fd02b567e7303c4. 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/QZTB62491206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c5754cbbb6730a7f23faf354d70c475090dfd833617a397f18da827ec0bdb6. 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/QZZ7P2510812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b8d729351a5dd919707579b9bb3fdf980fafff9df06f98b4d2c674b47a1675. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/TCAFN2183738.