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 0xf473eeea47568eefe9fc656c4d86ee3d8bd4f9ac6f078ea162d27362c133bf9f. Chain 2 (Bitcoin): anchored in block 953773 (2026-06-15T10:40:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c9eb9dc8-0611-4930-bb64-ce785fd1762e.json and https://artists.proofprofile.net/proofs/artist/c9eb9dc8-0611-4930-bb64-ce785fd1762e.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 0x755eabcf8cdc0733f4e6095994b4b07661c6235b3abfd625dc581d21f4583c55. 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/QZHNB2276759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3f261a5500a2062ee3dbea1f0011c870d529e5f87fb5437e77552df7a95d3b. 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/QZHNB2276760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c7eebaaff10deb9519e94e537c7c3bd96cd1882397ce84cf57f62abbd10835. 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/QZHNB2276761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08aae033fb8e6aa3dd8fe431b83b025bece37b3cd54c1cdede9c30d97f76265. 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/QZHNB2276762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d42316dc555ba4427797740950cc954b97b2eb865b65de608b3bc20b1c660e0. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZHNB2276763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb39f82c07d8097dad793bad2864579d15e21e1cc990247d2d89e7d4a106ba1. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZHNB2276764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea9376d6d73c27b0ffe1d70c31473027ece2e7f118e4afcea9f752d45604e48. 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/QZHNB2276765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ddf0789ff08700e198362e41f8c2cbc5b2f9f95ebb126d0427eb96d2d2e7ce9. 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/QZHNB2276766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c9a4b6286e88a350a03a98c89b3ee9ea577c083842b5aae147025bf6fdf32d0. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/FR10S2140084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057e2dcb3546ff20ce71325588542aec3a2b509da36715d1f1d10c7de6acb17f. Chain 2 (Bitcoin): anchored in block 957057 (2026-07-07T15:21:38Z), 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/FR10S2140085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36cd157a5ccda9176e075a39794a0488d85b265eea25f148729975ed9f45d30. 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/FR10S2140086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea519d6cb4694f0499eebbcf21cf34b3f2aed78149f9d67674b12e9a80d8040. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/FR10S2140087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4ed34bc06364fb55d285d96bfac6a1f96047ce59e89dc84caa38d02036d045a. 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/FR10S2140088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x631f1fc630cf86be9023174f8794a04bf0773cecb6393faa49d87ac5fd0efda9. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/FR10S2140089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e2e350d1e6e8c69c59baa6a077d0a980749c91b7a6e38dc7461f7ce60b23978. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/FR10S2140090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8fe12cacf6cd6ac17881481570625b73a8fbf041aa1df78118ec11a8c7a8d6. 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/FR10S2140091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c205576a83adac4e1a5b97f580361965b1f2e793ec55d8c3c4c5fc8185b7fe. 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/FR10S2140092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4781aa439e01e8e54513a8ec773470ffbfd4847a0c17532e22696e2db808bcc0. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/FR10S2140093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3161529ed6f325dcc50adb9c7f3ea836f140e30a1299b699ffe64927fcae22. 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/QZS7J2340936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4e33fc2f34feaa201dd6098752a4edc8ec7ddfff71f4eb93bf66d2f196962d. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/QZS7J2327017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcace6e0c9c2ca1589d382cd3e52769020de6ac47d9adf7647fda7ba55a68792. 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/QZS7J2387858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7948c3103c5af52057aadf177c7fad85cbf8790a6d060547899619c23bc10c70. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZS7J2375704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc5918182b756ca1533a7a3e6d96efedc5dfb8d040bb61d834cd5d6b733bab1a. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/QZS7J2311052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3161529ed6f325dcc50adb9c7f3ea836f140e30a1299b699ffe64927fcae22. 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/QZS7J2340936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce9dda68488086d695d36e49c6be33552e1192df6babd2b37e8ead1d362f8495. 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/QZTB22348214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61fc74b8a6a98dee0cfaae8dae29c36d36f64b4f7a1d772c90fdd0e86ec14c5. 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/QZTBA2394769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e69a475c048685a6c62c64ef611412d1f76748d06c1f1ee6a3419ca449b9fc. 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/QZTB62393393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33cc107ce1ece5d3450efe7e49f8ab9307fd12d5aa65a12740ab26aecde898b. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/QZTBA2394770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae12fd0417f588839d4032d8a67a390ffc80998a32206bd17bc13c34a0f0ab6. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZTBA2394771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x577e0469ef46034e6de6923e75593b1efe81eafb9cf57877155cfa21da71c563. 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/QZTBA2394772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45ca9af47ae85e9fa2333e8b9f34c455939090bfb83bdf0d4ebb427917ca513. 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/QZTBA2394773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1508465d76cd3434d3225f2febe5b3c7cb4e53406587a6fdd1f9ccb88488ea9d. 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/QZTBA2394774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3aae2fe0efbddbd0ddda47b9f1859caae9bb735acb7b324497c9c73496ce05. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZTBA2394775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe884df604d435600c7fba3683e2a45328e391f508ebe1081d0cb1257a1f8a59a. 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/QZMEN2481705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b6e932873a3b2fd050a34fea93b8b5ba0f2573c67eebf0f982ec03d3423ab40. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/QZMEN2481706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06eeae7025be43bf33ea9f332978df72f3c7ea94fe222105cf0849043440b479. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QZMEN2481707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba862ebadca2ce0bd07c138ba0f038fe3f442b5784615a5230af44dca14cc51f. 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/QZMEN2481710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e69a475c048685a6c62c64ef611412d1f76748d06c1f1ee6a3419ca449b9fc. 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/QZTB62393393.