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 0x471e712a24b30475c835a1d8768193521e0269ca08cc8015bbf7ec4c16695863. Chain 2 (Bitcoin): anchored in block 953617 (2026-06-14T09:00:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1bc62e82-aac1-478b-9793-398127b0668e.json and https://artists.proofprofile.net/proofs/artist/1bc62e82-aac1-478b-9793-398127b0668e.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 0x5db50baed1fb81e50917be6408c907e08b392536eb5ab2b70155798fce8bd0d1. 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/GB2GX1900318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d441a55734b0b46ee51fab1b2e4ab23df81711e88d91bd787453fd9c25455d. 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/GBMA21867212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ebe577d7898cdfce46be1fa1fbdfe3b623535526bcde2c01f3e2820dfda69e. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZES62167581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42e3b2d9cae96f9292d45a5866a2c2a61e6a7a14024810e8c59abe5e37ec68e. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/QZES62167582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8b359fc023dd4cc055f96f1291ccbef0960611a789d1e8ba776e196502642f. 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/QZES62167583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b89f05ee308a2d0b2ad1fb9c07f5cf79ea77f97ea5b165c954dc4ed3b53bfd2. 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/QZES62167585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54494fb5dacd19b155aaf4b8452b05dcb42f07aa678c379943f6c202e98f5d60. 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/QZES62167586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9f6f5f7db8f4b7e54c1ea8b515541f21b0384d517b0ad3ce58324525093d71. 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/QZES62167587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f46447d898371a7bbc408df94cec55534e31fc3be02f02d92e0fd1821bd907. Chain 2 (Bitcoin): anchored in block 960230 (2026-07-30T08:32:18Z), 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/QZES62167588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff9b70b72e7ebc70d3e0d0b16d945612f1e97840c83db4be977e27f42d1135bf. 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/QZES62167589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29aec7eda53b07817f31f6a1ec6f99cd920072af8ae0268285cf6afbd315246f. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZES62167590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a507d8d85f5b1503163e98a8dffd3a68d6872387967bdadc82823a7ac4b9132. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/QZES62167591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14818a56989122e0a49e9b9898ca4e67cdc15a0b521836300caceda7c4e2dd3a. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/QZES62167592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8a151848f9f6c93b8835ad0484b3f6af9fa88dca3cfc0dba5c8e47f4fe174f. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/QZES62167593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e0ea919cfbe9253033588d897313b03aea0764982393391218d23180b8c55ae. 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/QZES62167594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea3ab32cd41275f21e81caebaa05b5315d432afc215fc0e689711864fec7342. 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/QZES62167595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409931bc269d87e7cb021ceff40ec375fa8a70d1dd569ce4c659490beb98f23c. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/QZES62167596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ec19bde9ea2490caadc21e4e8ef7fa80d7d721b79649d0d6c7ac212d8c3dc3. 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/QZES62167597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf60df68b56af45ef1e777d466117881cc4004e3432d886179de09f59bf45ade6. 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/GXBAV2506586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x913d1358609a06b9d381920063e0e005c487d47756d3fb5bea313481941e1219. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZZ7V2477580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e4808a8ba8524b9e88b55cdb10e3dc8c7d214c9c06624f5b43f2e89e7a419c. 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/TCAHM2362758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620f178f539218e9b3d0e12cbd45d17035d80cd715f62b71dcf7ffa5dc65f747. 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/TCAHK2377371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05698bd9902f07869776de3ad81c45fa13a08d0c99c3e78104cd3f8d23a5374. 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/TCAHF2378249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6daa7237ccddef44a0b6b6bd02b47f3e8e0fe42741079650978a8045b9e5e4f1. 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/TCAFO2107001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1729568add9ba05f28ae9f06fddcad675e41d4e2f91ee8cd612861c0d98f50b4. 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/TCAFH2018035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a10f45632fa535ee5cd76ad8ecacb51a33a75c0bc186efc3c10b5f333d5e73. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/TCAFG2009683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6368bbefedf7ff8b9c69c1e4538f4732fcc52ae509aa07a1612a1cf7882a0d8. 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/TCAEJ1924984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfddbcb30d9779b0e29666eb958b6b6eefde95bbfc033b623ddc8b1c3adf4d057. 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/TCAEH1900209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a2d490a1c4ef6d4cd3e14b91f89882675e1e2938b219b5639aba33fe281b01. 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/QZNWZ2091624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca617c3278943831e61ea936e0372f891f37f7ce0ad4e9c738cca195963c267c. 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/QZNWZ2091625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0dd44baa3c9d418c285c7269f14656929c56a86db97463356867d2061556a34. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZNWZ2091626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e04126326d2444df8d7559060b713b3c80e8f635d2283f25aa489f91a304fca. 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/QZNWZ2091628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74610bbee06852e33a06963a7af1a469d92b7fe969377330f456a48762b6e3c. 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/GBMA22083578.