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 0x1c759ac055ca33aca7f7108852cbb97f82cbbfa0989c59a919b781d4397f56a7. 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/2d0cf671-5dce-40a1-abb5-804de0bca61b.json and https://artists.proofprofile.net/proofs/artist/2d0cf671-5dce-40a1-abb5-804de0bca61b.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 0xf02211c4ee84937cd880893387587ae5868dc535df39ff90ce78ed983588cd7a. 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/QZTAU2281312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a4e32cdddf86544f98431cdb54895c7951249d2c50c629f25a236dada700f1. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/US83Z2333675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ffc9305914d322a9ba1082f94ac54f754c4a44bc147e4f2acfb00ef281f5c1e. 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/UKXN22265882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x412ccd54fb4000e8187a07bb959f969c5024a2a2a3cdcbb652442608cc336732. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/US83Z2226622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe813fe4818a5ba746a530c5efd44c41a8acfb4d11e10ede9b8339d45b7bc4bb4. 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/US83Z2224009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf87a6167698c0ae4b86d766cd70728db4037e4cba3ea93574976e96d1257f6. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/GBLFP2208313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x353fd54565a3ea7ab51b590872fec180eeed1fbfc73e7c431ce8a94866aa009b. 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/CA5KR0040996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d52df62249b818fc3d842518a640c26f7a26d422f4213a9b342c3a03935e36. 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/GX3Q92194386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab64cf88f3fed1b37d9221356a549c26a0dcbe1f6fdde8197f42f28b84ed239. 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/GBKQU1986089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaacbb8d5406e3e4ace1819880da01f1e95dbbf1867ce2a46abc86be4bf409543. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/GBKQU2090288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d5adfa4b4d92f1f3c951f54a08e8c2ffde8f2d1aae7cc81e832949cd264e04. 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/GBKQU2090267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b3fd9203ae790675e1824b000d29a7558800e57122ce90494dbd348e568013. 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/GBKQU2090264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc076d8724ea1f2fc4c2a0b2ebbe8609216b6f965c0d6092a8f0eeac1b22ab524. 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/GBKQU2090265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894e86bd8ad9d1829e4e4ef9a1c3c8e509749b84d5e324c89ab50b866e467be6. 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/GBKQU2071870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076d0a0b186e1ee3deda79f694cdf3839148b228a2db051a7bc81e8944929e53. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBLFP2007580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9679bb6dc408a526de935f1f311b443c2becf983556ce8d7d535c52113cf178. 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/QMBZ91951387.
Still Together - Tonystar & Syntheticsax (Sax Radio Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe22aa6861ac172ea271f2e5468c254c2784553f89d12d11c76e5b32399bf21c3. 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/GBKQU1964436.
Still Together - Tonystar & Syntheticsax (Sax Club Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc9450b73a15ca849a879febe49bfb38ec434405147f61cd827c79bbe449d384. 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/GBKQU1964437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916fa1be1010c5018a79c892ee9fce17aaa22fe34be68f45339e17637f3be96d. 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/GBKQU1960727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e56b093ebceb16afd8f829c94c0d14fc76471e386afd6e9ac5aa0ae82148204. 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/GBKQU1921284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a306caa2579d692f766436e9fe774290499154a9bc2228432a437fd6c23be54. 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/GBKQU1921285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553c168c5107fb9780eab2befaa9dcaecefeae61aaa02fc9052b83f214a55dfd. 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/GBKQU1902597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8624f51a9ac235805f1fa8a932abc70137fda68a73bf95cf936b06152cbfc3. 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/GBKQU1902603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8d1a9e73d71ae6145d0f198258c2c685cdac3ad95c91380f83bc4e9f5c0e47. 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/GBKQU1902604.