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 0x8d4029d5839af7c1bd3a882c8e269fb1f3bf62da0fe7c98ab45d00ae8e60e1db. 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/4d2928e2-d85b-439a-8883-6903623fdd9f.json and https://artists.proofprofile.net/proofs/artist/4d2928e2-d85b-439a-8883-6903623fdd9f.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 0xf3fb3844e3698768c1d594e36e9ec891470f9d7a4e85b8a31bd8a3e0fa31545b. 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/QZTBF2400206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbfe6bad9d5db99a845ca0d9e6560f9cef67a56ab41fdbd5dba80ed948993aeb. 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/QZK6G2493383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e30dd8975f2956f2d5c1c10dec754b30a7f138f2fb2767c0c3d62b22c1e43e. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/QZES52459034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb23e055b4e3ccd72df1f1aba6dba96302a33969ed9faa225784f1bd3ca256893. 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/QZWFG2396816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458214cc75bef01ea3666737c543ad453d5472e02c64a8aeca3d169a6ede988d. 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/QZTAW2362171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc21917a0707b9b97084babb36626f5f3725721aa72a2a98d83af9023d45b723. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/QZNWX2370438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf749605c665757a1797ac09e9c0c55f7065d2f644b4607c83a331eee3f40cd7e. 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/QZMEQ2347421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f88e1a4c51145600382bcfadc12353639d7c16cf54cfe7c735a13c6e711310. 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/QZDA52319561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c170d447c328fde3ca208bf3ebae525864495c62dff58d7ece08a9ee8f18bd. 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/QZFYZ2307280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f27a7005a42d8d07a1e7294f31507258ab3080289933af21e536767c71d9c89. 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/QZFYZ2312783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa790134aa25625479839bd0c0bb442e10c137adf898f081cea35e4b0100c3c42. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/QZRP42236461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e8782a9708ea8b111a30df3f7285121644813ed1ed531447b9b31a235c7005b. 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/QZES72269771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0417159d3241ff488667d541b48c1345c98177a0b9a7e5e5ce73aaecccf8a8e. 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/QZMEN2149425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49cb11418253e3ef72c77d92d5c59361cf6a8911d5b8db7551ba1bb32b5f4801. 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/QZHNA2101432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e6077a9eca01235cc3e7f8065b6f6cbcba00d36eb5e912a950ab4b47407f34b. 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/QZDA82178107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd53b574b17cf2afa05f3ec1decb8fb4c2008a70dca96fea114d70b72637a83. 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/QZNWZ2001816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72dbf054d4ddf73522ba10317dd357cf074bcd5e6643cd145e9b4eb2dfeabe0c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USDHM1719531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf19b7e95fa22ee2cf3b1e57188eaa9a41e18a86f073a36fb14f4ca3e3a68dc. 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/USDHM1719532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f4fdd0b7d0f62b7b71bd05428b28d0d8888cf196b68957df9555c14076e5bf. 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/USDHM1719533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7766c9566a46db7979d29695e6b60e201a551fd3463853e5a355a4752eb72cdf. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNWV2043080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238ff92607748ff65c0a4dd9c42c8b7a5948a235bb1a285506fd6ab0b68c5b46. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/USDHM1719540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925b88e4c493e54883232260e8b9ffb39a638116cd826fb240f91db25a88d6e8. 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/USDHM1719524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b03b8892724ed7c4255a44e0f19f40e312d3f8d13e9b1fff6a2328ced8fe1a9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USDHM1719525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab30e8f4ea581867a5ac633a6a2573ee7a8a3bcc2ded938fa76454d5b95b4640. 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/USDHM1719542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c648daba4a5ea5e54cd069778190ece374f97cf23d186999cb1f0a6d70192a. 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/USDHM1701765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3377de39e82ce09e0b11ec3344ee06e19c18f571949418d0ab966b6cd2bc53e9. 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/USDHM1719534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3062f6b87db92e6dfa68bc480c38fb1407d596a7e535464416b25cd61257687d. 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/USDHM1803101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc63344987a4dbf5e14fa0f080aa345ec462dcea259039dc0729a672a7ef9352. 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/USDHM1719543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea9a8923f5e363196a8c3be71c4a4b92f84e214c1386a2f37fd9b4d377f0e6a3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNWU2015523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1454e8bb298adf8ee1a799803a731560a59fb7dab458503ef76b751d18ff90f7. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZNWU2012819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbff5d95f536d6002f8a6a6f84bb56ae9c099c9c1c01fa4bf25a84cbc098baac. 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/QZNWU2012812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddac2b8f65070c0e09db3d84a60764692eaa5b2acd988e633aa22bdb10661737. 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/QZNWU2013125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4f95d111703c558dea783a7286ce0cd32e97b93531e01f0453c975853da575. 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/QZNWU2012806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa436d53e3ec925cd5cf2e9bd106654326a07ec05d5e562622f1b825ad8e91424. 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/QZNWU2017864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a9888722b3f2dc40a7b1fd44ece342ff37f8561aa154dcb38bffa7a03b8fe2. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/QZNWU2013121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5c84a4a5afdaafd948b2aeaf9f9f9ebb9140e85b2e00ca9eb4da495fbd849f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNWU2012818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09637c14ac59a3aa289e34ae2c3f1dd24ffc89c9639c146da252b8ac21b15261. 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/QZNWU2012825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f3fc6e6bdca60c3219f61a1526ecc25bb90878b6eab773f1ba0f586c0da2a4. 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/QZNWU2055599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2024c2661bba220efc66e06797d613f1e8316069a8b34b38133a26c9acb5f47. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNWU2012809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f3e4dbe5d85e82acf47893d990f306e234715fcb1bbad20c9aaeed3812d125. 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/QZNWU2013662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a237f05a615fbd5e3b1fb0de9e5ac95d0027afa9d74f84b8b9c77627387a031. 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/ARIXB2402150.