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 0x6bb70e559c42652de23a0e677b7058fad4d150e4e392670c618064a38c5d69a6. 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/6d033d49-b66c-44c1-b302-297a7b796bb6.json and https://artists.proofprofile.net/proofs/artist/6d033d49-b66c-44c1-b302-297a7b796bb6.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 0x7308a95c15aa522d00ac4a4b0f2d4eda47c2d62cff4660fa1d6c68f5358131f2. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/FR10S1960946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1dbe39ccd37e0d1cf2a1751fcf049ca9530b71514ac8a897537536f66a23ea. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/QMBZ91910623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3ad293ad7e591cd7684a7df02785d86b408095eb453951b90e3c721fd29dd2. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QM4TX2000500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x853a1fe2051b9139befa07ed957fa1809bca2297f2356d7d0d1a1d4ef255cc52. 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/QM6P42010154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947370a73f12e8c1df9a1069c6271a0b19204118353e074d0f93799918856da0. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/RUA582002051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23272be10bba4a57a5eb638c1f9dd05c3e4088a57cd179bedf6dcb5f39fb372b. 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/FRX282176310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e550a84c0be78f31954e74fbba826931db432d211c7284dc93057fcee52b799. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/FRX282176312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0aa0b8099ed75cec44de656f2565af9919a0231396b9b8a310dc9e55c1e7b96. 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/FRX282176316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec25ed4fc3944be667a638b3995572263535a77619dc69f2ab3707399bbaf0de. 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/FRX282176318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c4ff95ce5353ad11058e402b6260296890e093c0064595f08c848cb22e9fa2. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/FRX762185820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x287e735e7ef75422870e8f3d43e242402215011ef1686ce701190aa39ca2d5b0. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FRX872194440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9b712135bf425f91c241d42071b426ccc57ea2d033650aefd878157a776503. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/FRX762383224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4be67863d409abebef840d625ac8634ad6be7e143cff22601777dc3f7da878. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/DGA072393689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0729d66f9a6738fd7e341fbc32dd4dee732c944d91f67c0de6d504cca611b21. 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/DGA072393691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85731c83386a5a7d9e767e72b7cfa76a18a4e1f8f0c95186bd9ed9e303621abb. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/FR59R2413752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd20f7652696e116c59c7ac159b1c23c50acb83461a5059cea6f4bdad81542fda. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/DGA0R2458951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aea3eea9750ed9f01ad0bd77c6b173eb991bfc55c7750eb432d363dba73446a. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T00:53:33Z), 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/DGA0S2450853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15d22505746fdb8d0109b49e54b06d181e3f7b60691eb0818afcc67ae0e052a. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/FR2X42531701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ed620fea629f8d19b55621cf799711c4e0a169e7e60086687d59ccc9b4ff8c. 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/FR59R2510795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b80e72521b4d9e64eff422dc3c2bf1ce3ed78222adfc3dc7c642952c1fd0583. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/FR59R2548020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241ebd1b6845a0330373ad12d8da3f2949c5b1cc28ccde34ed5fed8a467a6506. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/FR59R2548021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x474157d8d576516c30cb13017a9d76e99602f02be3ccb7c683413b1d1010713f. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/FR59R2548022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1676c1c7ae9dafee301aabf06a626371639c5d87c7bcb487889a0c038dfcfa08. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/FR59R2548023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ed620fea629f8d19b55621cf799711c4e0a169e7e60086687d59ccc9b4ff8c. 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/FR59R2510795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef30ec9695066540012d88e78e78619ae1d6c8890348686f1de2c852c6ced25a. 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/FR59R2548024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad00b3569a136ddfc320dfcd6e2c393326ab26d3c2000e874ba9b3c086d773a4. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/FR59R2548026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c324258f73bd40a92f826ed9837fa6f078e89a47fc8ae87c3a59fab98a4dce. 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/FR59R2548027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a066c604db7aa0a422d8e8398c6752af98ead67d67e753301a39a46303c90c4. 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/FR59R2548028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c69e607d896bebe104bcd6043cce83ab6e8d87446228376c1c8fa15edde3ba. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/FR59R2548030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693f67013e3977809d156cadd77997986cd91c4830a622fcef3a31de82e92678. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR59R2289312.