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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d00e88491ef9dc762b2a55910d3dd168620506745fcb3c9a886fbdef4ac4e82. 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/411f9c7a-10a3-40f8-9e30-9632dbd4fc60.json and https://artists.proofprofile.net/proofs/artist/411f9c7a-10a3-40f8-9e30-9632dbd4fc60.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92462daae312ac53b56481d2781251af235a6e1a34b47b24418aaf935871a0c3. 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/JPX522200052.
虚構の塔 - feat. NORISTRY, あげいん, ジロー from JJコンビ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9daeda81deab8c3fdbf1b5cb0cc606f5737b3974da52788e762138916bb55fb. 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/JPX522200054.
Update - feat. Dream Shizuka, わきを from よさこいバンキッシュ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d40105199c5eb9b49497d21cd7357053b607b91222dd71aab900549b45eba87. 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/JPX522200058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf81b3e58064ef219387ba8f955b9d10f4d8ecbfbbc124f6d791f93b3d56976d4. 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/JPX522200059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0a9bb80e15d40693567a730da53bb48fdf982650c1d370f746860188e119eae. 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/JPX522200061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf64bc89d2e394a89203a3d32f565246656cbe3357a934e4c087380a1779a51. 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/JPX522200053.
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 0xa24df9bc243c0aae45e6c60308ba04033a9ea2a5ae60c9037251e64b530e8fd9. 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/JPX522200055.
魔法の瞬間 - feat. 心之介 from ZIPANG OPERA, ゆある, NORISTRY
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a0e1319bea40a4396f297897e1678c0b85638108887b6d87e7b4c62eb6f4af. 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/JPX522200056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd536269d0bb25c54a7e8185da790205e9651c3746613645df529c8de9a26c6f. 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/JPX522200057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x128ead357d6a84eb2ac0ea2e0191b98bbba7c221f8c88520274ae9432100b6e1. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/JPX522200060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e77456d0e98230566790b83561b8920bf6fbdf481c755e7f696552f7857f20c. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/JPX522200062.
VOCAMIX 39's (Mixed by shirayuki - DJ Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd19616a3de446470e8881e2b59870140377180b5aa6bd2184325e95eea41e95a. 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/JPS532400036.
twintale wonderland - Remix Ver. - Mixed
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f47a4e85c241610f147fa6d2b3d5a3d4be68a2ee358b966b92031f54f8ae6b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JPS532400049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc1fd07ab6238b8b35cfdc42309f09feeecbd85b42299bfc07df12342a6e6e9. 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/JP92N2422040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0df3a9241f430b98246bad3d6dc7a740e807967308c67522b6d36d2b05738c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/JP92N2422041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19921f86bccf7697e846831b8f25a50aeadfaeed69fe0e9da9bc714ea5d753cf. 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/JP92N2422042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bcfa44ab20ab77658c2b1c4fea8672cfd5f41b9b420bf289032f7748a9786e6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/JP92N2422043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947b8a633945c1d597900311b879c59cf48e82bfdeadb42c9db1295484f3079b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/JP92N2422044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20c382ea897ebbff79c2a34f46d2b868b286789a22f768b72fd4070c9a93500. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/JP92N2422045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53bc6c7a4604ab9166e65c6844bd5cf1c38be88491e7b570dc3d2f60aedf8926. 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/TCJPS2243270.