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 0xfdbef9d512f15b5ec6f882ef198a674ecc1c2c7acff7b7563e2f12176e71c0b6. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/32163586-d585-468e-afca-b67934d681b3.json and https://artists.proofprofile.net/proofs/artist/32163586-d585-468e-afca-b67934d681b3.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 0x510ff6280647c375774709ee82cd9a1c263a407864b91075a2f8809e13309aa2. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/JPCO01642390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb8645a0532d8ccfc62d134a95de817b918308a0553d001248fecbc64d246ec. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/JPCO01642400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d5e62ad5ebd1799f2d85b2cbf2758dbfebcc92c23dabbf91fa825c972a9f0d. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/JPCO01642410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36cd343664e8ccce4e2d5447026b5ce375c6c9d930f7ca7469ab243b2abcd05b. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/JPCO01642420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7103fd55da92d2af122c509ae8da0b850ae9ce3f725a9a7d68aa7df1f4a01da9. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/JPCO01642460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6d5a0f9ddf0cb09bf47890417f092ebf7a654cb9966bed681f5c4882694dcd. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/JPCO01642470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a34df9610ba6bfbbd76c022b7cc157bcd37fafb856f86dfbbd482026b801f1. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/JPCO01642490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec5972bfd7d4a6d0d5ec5758951749749e5d2e314ce11d7989b19e6971927f1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/JPCO01713570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce80ed849cb39864b6d600207aaaeddf24129d9b730ffafbf3a3bcad1adccd31. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/JPCO01713580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300c5268f997320b8e38b3f4348df1f26a7ce8ee5dd7f1a7472b811cfc85ca64. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/JPCO01713590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe708c59680093a3b32e0fccd1cf428bb5a8407025ade89b19fabd827cd2f063e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/JPCO01713600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c43ff148ebb815382ed68c7687915f7cd339446bc8737c74cff43b8e28443f5. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/JPCO01713610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b925bc1f1ef4052aec500e276e9245e6e81c708bfe484301b21004eabe48880. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/JPCO01713620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150f8a7b88e489d75a3c2e7b4493579579ef438900ad0aa0371469278cc8eb91. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T12:33:53Z), 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/JPCO01713630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07c75b77a17256600a10860db6bdd91f1fe5f6080d2445517b1249f938adf9f. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/JPCO01713640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277d6263dfe7da777d64a3f8bc57671b3c4509f4908791cf3d50ec888ed67064. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/JPCO01713650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb5d9e15a76c47601e3639b61a2ce162dbb75a6ccc4b8c519378dc44983c853. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/JPCO01713660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33f950b11bebea0392475232ebed11723a4c0e5abb630621a57cfd7b97663fc. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/JPCO01713670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a6175a9ef2fe44a571e23d8e3458232a50cf257803e054bf72d77692730eea. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/JPCO01713680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c848eddbf12c9e549b8cfb5678ff05e562620b9cca0288b0dc44e17644aaeb. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/JPCO01713690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376969ac730d39ebba4631f216df134683471be5c09fc41105f51ba71a9a85ff. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/JPCO01809560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c9c4e8ad114740c1a4d17aa36e4e2bbbf4fd0589cf312575013cf1e596cf188. 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/JPCO01809570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7435f0357edfd531c3caa48bfe88a85a23d768fd460b402e9a059c00094124b6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/JPCO01809580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c24171ecb7715f6a9bc9376cc0da3627d7adabae78b32558de3a4ec95c73152. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/JPCO01809600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd598e156af69fa35f25c18addb9b0519017549f9b2dfbdf95cc93fe39ff653e. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/JPCO01809640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1d564a07f1646964c260b1292f88f35412451c068f821edf548432447f7357. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/JPCO01809650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc79b87f3d04a205ca2eeb3a8e7c3b223a53a377e8a7583e6f9c11bb521800073. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/JPCO01809660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5c90c5ed67ceb00c170a5b3dc068e5807fe7638cb357eaa9e505a5a485b7cb. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/JPCO01809690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d8ec5bef344e016e747829bd5c71cf4d25904a230e21548636c96ee1eee672. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/JPCO01809700.
癒しのチェロ 〜平成を彩った名曲ベスト
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf887be7728000231623e4992e8fcb205e73770130aec42690e28820cd57c47b0. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/JPCO01909270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x686541addad8f20e102709b68b2f85ca777eea7edbb9df5e65f1592b7b6f362b. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/JPCO01909280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01fae1fdf54e9da38f68f3c23ae5e02b713fe44fb9d997d40fb4c1fdd5a2c73e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/JPCO01909330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc809acebe5ce49de02a080e967e2d779855f3f810124f35c51aeefa699916b9. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/JPCO01909360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x601aff9e161913c46fc3187557d15bc22b64b74692fb56b40cf2798c2830359f. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/JPCO01909370.