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 0x08255093418c0000c67e9a2c08cceea086d9021e20514b59cc51ea971ab3c929. 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/b911b5c4-0c90-4c91-bd8e-87bd894dddab.json and https://artists.proofprofile.net/proofs/artist/b911b5c4-0c90-4c91-bd8e-87bd894dddab.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 0x132d5df58ac98687261f45ff9286b9faa0ca07c8fb22ad65153a5e893402cb4b. 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/FR10S1977665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1199cf4e9764585ade7f017f6ee3c97b0732de4efe89207506e7e43b523205. 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/FR10S1977667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0218be5f6189fd447e12eb9f30e4db990abbab407f612a7ec371ecfc3c9db53d. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:37:09Z), 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/FR10S1977668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e8ef71c504831d840bf9b6fa1d728fd0e683ef6968a3ec46ccaaff9461e33b. 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/FR10S1977677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee681a815b4e2c8fb3f48b4d5888f39163e761c827392a97fb4e8de689569f7b. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:23:31Z), 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/CZCL52300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241a14d9b7cd25134751b6fccb7d17873c95575a0f17ec1367520cf58526fbb0. 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/QZNWV2198133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b4daf42b81663a7081669d7ddeb6e609a8f2078cd71f7e1a67a8c2255c0ca4. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZNWZ2062482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37b6473aab7eddb41be473d23960b73417978d9cb433385d4527a08697c6934. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNWV2198137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c636f270ab7f9f4a202315eefd264f82a0e9c2455071ae0d7aeb6e363e4d095. 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/QZNWV2198138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3f76511b09273d9a47922b5ef21039d1d674198be692a71be95f3a95a3c16b. 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/QZNWV2198140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa813a7acee40211572d20473b84b57ee9e72224281ec0a0acb7833464acd5f99. 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/QZNWV2198142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0237bf6162e2d735f49e82b8afde4e453e71a7c3ddcbc193440aeb2b6be57a8. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZNWV2198132.
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 0xd566e62791331dd77fee3ed9b50c6242380ab2a49d68719aabde5cb391ebc55f. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/QZNWV2198134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2897d127a75837b3e24eec6934ee222bf9772092cf49966a3655bb699e69d286. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZNWV2198135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6cf7f59afbd6f2f9f9579d95134a0ea29e7f397a2920ae78ead8a9c96b67de. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZNWV2198139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e9f352960280f9d31821bc76c6c1b1c7cfb613b75f5b29d74ba8425b4e93258. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZNWV2198141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a9025f1bad8772ab29e102329144638a1ef1aac7c1057278cda0ede8169abd. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/QZNWV2198143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402bca203881753fe80bb2345ab9f1a6b248d489fbddc3c004cc475d4e7e1af6. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZK6F2401208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2725e5ca4ed9c5549fb30b2b40f8408a2554559e06143ad38853783489d8381. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:24:54Z), 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/QZNWV2545561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff01e416e8eddcab18179a63d559c9f642a31a1fb67203ffb7c9589f5169ddf7. 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/CZUM72500664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30442a3017f6922593845227f283f511c7b4c242b4dbdd99a1a0cfb3e524f088. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/CZUM72500665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d27ab05c7c1c7aa38749ecb2afa0e059d4097ef97a1ac9b85ec51b30d349f4b. Chain 2 (Bitcoin): anchored in block 957057 (2026-07-21T20:44:19Z), 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/CZCL52200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd1177a5d0868e77db1d7e46019625129cce77d6d4b593d8e75571e4b4ffa4c. 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/DGA0Q2376610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd1177a5d0868e77db1d7e46019625129cce77d6d4b593d8e75571e4b4ffa4c. 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/DGA0Q2376610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17a1a38d687b1ebabb90a906ad07418cf0a7d43310e6a87c28e52a25111636c. 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/CZK801800043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x415c3d770d78b477ca8a44c9a329a83dfefacd98270085c4a5d0c7a0553d800e. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/CZUM72400492.