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 0x89552263a0e64fbe5cd61a4de0117309759d649e31cfb15c1d147a0a8c59bfc5. 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/2201ee01-2952-481c-b738-362a5c4c022d.json and https://artists.proofprofile.net/proofs/artist/2201ee01-2952-481c-b738-362a5c4c022d.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 0x0f62805a698902b8552a6240f2619fb9e781792610b65903158006d63ada9b4d. 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/FR7PE1702210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5182baabaa512d3f7ca9c8e416af3eadbdfd290cb2d77530415713f0e611a60a. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/FR7PE1702220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c5e79fc8e76544e9b815e73d1c9534a20e10dc035931b885ad9ae50bf75e348. 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/FR7PE1702230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d08d2320a0b8f86c89aad3ce62a251c1c319696eedfc25c3eeb605623f7d7b. 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/FR7PE1702240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe3271267d01b2e4a2eae0a3aeb0a85fc0db72839c9ba86ab1b9ad66e81b11ba. 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/FR7PE1702250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe066b9de7356e1bbaa59cef3eb4f8d06c93da3ad29b0f35b1d5c73c55076e043. 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/GBMA22357075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2e94455d5545ed552315d9a0623ab8e307950d000888a745be2924a2005ae5. 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/DGA092434847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eaf73e4d188cb3a0e193f96bd6fbe7c5351614be669ea5cd5e209df1d442080. 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/DGA052434035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48fb7560da2b7b69ade43e507c91c9fdc72e1fb00b21934f9fac4a3befac1cf3. 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/FRX762426257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9cd9f143924859a4cc089b382d5839c3fcae1bb252e85314f1058aebe03d923. 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/FRX282460622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b3af1c5a5905b6fb0ef89e0745db690216d3aaf3f316dfbb5412189c0123f8. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/FRX202457036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a1ea840f674a82f2ee2c92e930be34e931a706217485613b24103b70b966c8. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FRX202445724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd95047b1faf15864788895346693b665ccfa45d1fed0adb28cf9a248e8047604. 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/DGA0L2374500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb600ec843b9cac18d419d80b0983d2652b8615050fda9b5cfcf8b957af2f936b. 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/DGA0H2310489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b406a45965139871f4557c82773f30cdb8e85028e6e8c566e6b52fa019663b2. 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/DGA092326089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0ef5e433052098f07880332807cd862c5cd0f2eae2f8885adf7f864c95bafa. 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/DGA092350388.
Il nous reste pour faire challenge (Demo)
Il nous reste pour faire challenge - Demo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbcf1bf868b48267bacd6127c84abe356385164e9ab8172ef5d4f05cb8fb99a1. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/SE6XW2314613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ad9369b38dc8f40046c3614cecf4479208d8fb640d19e4ae3cf9bc4d90b806. 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/DGA062377936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f31a681affadab28ddf972e4aff0e705a4d7dc1276bd3c04bc6b4d022706c1. 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/DGA052306415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1cdfdd6ab6450e207e9fd1a9b27f7855f2e6e33965466642bd6952262f0509a. 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/TCAHD2334896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a1cd1ceb9611d05406ee220a7c83edf599b638a11b8fcd77fbde1a27a16b662. 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/FRX452381415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65bf6d2adf52dd75cdbb3f67774f4b2ccd05a9b67772ed8e2534cd7030840b5f. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/FRX282368103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db154eb73c16744f3518da3efd957531d1b627db85333db32c59f02aa99759c. 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/FR2X42312765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc247c250bada2fc2f4900ba39580f647fa537762e0ef9b575c28106caf78a55. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/FR10S2308003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb789cdf95e90b125921dcd4fdfeee69f4ba2988870e9b5dcde2d033323b3654. 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/DGA072266360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c4a1988fa2ea904571ccbfd3df257379f5946eef4ed1e77296b224a80deb018. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/FRX762261312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41f6efef8fcbab5def6680e5ceb09753745d80cc6110d5f983c4e08f87987e1. 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/FRX202296277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7af192254bce61ddba639c9f5c352d39e9fd0fb0926b060339e8283d086c500. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FR10S2214011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4761994479c1c9bdcfad52e7e42a3912288e4071cff67a49381f21192c53131. 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/FRS182141925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1f26698725bdcbe80d3720b7a526fb7b0ab1caa01f9b4dd667b6033c23ec90. 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/FRX762179630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72124010807dc8bc38dcfdfb7b6078853af9269b80513b2d00801935639d3bdd. 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/FRX762101794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee2d43bfb2fabfaf30396c4b5d68695651b4411122eb5f044b0238b9e01830a. 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/FRX202180663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d00ac6ffda36d39b0a0417c340fdbc0e1a0b8a94da49e388c4cd6852d3fbc6b. 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/DGA072192382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43d2f9ccc7c8c11fe79a49aa712a931b9a047fd10454622140cc363feae3354. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/DGA062066377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb69771af33236a61e9cde0b31337b8d425ff1ca1b2ccadad1a16be178eac69e5. 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/FR26V2034053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b790662bd7e409a6a5ee9648c1791741856ea2b41a145d848133ce92041f06. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/FRX762085859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687e28298287f579c4b4c00c30a7ff2915df7281f8805edf3fcc3d89b3135ffb. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/FRX202044036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c9069ef11cbe3bb2ff774e00e220ac5f5653dc8b560c76b1e87be9c7c79d5c. 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/FR59R2069100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0465435e21d682638d98d36f78b3a854af4d8be6b69dc90cf0318d89aa490675. 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/FRX872117315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f05ad9b01549da2ef2580cdbdb96e008d2cd6e90e4e8c0d0b3439642212229f. 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/FRX452325218.