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 0xaa470ef19cc0027babda6dd5ced94e7a39542661ec49c42f08723b58dc07e9fc. 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/c8ac28ad-22a7-4de1-8360-98c0d19b974a.json and https://artists.proofprofile.net/proofs/artist/c8ac28ad-22a7-4de1-8360-98c0d19b974a.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 0x7a3dcb53e8786b9f55087fe8685c338217e2e6b010f7f4e269e555b4a117caf1. 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/JPQ322100162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c1c9ef0fc72110c48b345067a6551d78be7dcd66a3046b5220b5a107966e2d. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/JPQ322100163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884317193ada6ab95638be406307a4e0dfc4f88108191c38d34e475d0b7c955d. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/JPQ322100164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e4e239a03d130d588f613a11baed323974c498227e132253a846bbaab68c94. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/JPQ322100165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae237abaf0584ba30d828565dbae1a86b742bde74091d69365b25ee609d2527. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/JPQ322100166.
Touken Ranbu：The Musical -Shizuka no Umi no Paraíso- (Tsuujouban)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ab3042a59082b493c15f22edafaf56c23c89b8999bb37e9d6e09880575409a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/JPQ322200090.
Yellow Sac Spider song by Ookurikara・Buzengou
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c1c9ef0fc72110c48b345067a6551d78be7dcd66a3046b5220b5a107966e2d. 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/JPQ322100163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884317193ada6ab95638be406307a4e0dfc4f88108191c38d34e475d0b7c955d. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/JPQ322100164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee3f1f38d5052201901ed17616fead94198f8be53e77834b708da9f70fcb705. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/JPQ322100161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae237abaf0584ba30d828565dbae1a86b742bde74091d69365b25ee609d2527. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/JPQ322100166.
ミュージカル『刀剣乱舞』 ～静かの海のパライソ～ (通常盤)
おろろん子守唄 song by 山田右衛門作・民衆
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84f16d7ced2626f95c8030573ae4e6aa5d469f6988137245b013dd516de1b1c. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/JPQ322200097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9401470ff1ca8adc7aff5121f163ca8c3b9c6c9063c663e1084bf88936f79e. 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/JPQ322200098.
神の子 song by 少年・山田右衛門作・民衆
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0016e2c19b59bb74680f6f2229690ba57e017f3227d831b3992d5728716021fe. 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/JPQ322200099.
鯨波（とき）の声～謡えパライソ song by 少年・山田右衛門作・民衆
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5324357963725527f5823812cc10314180cd233256724927f67c2b71b5e5615. 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/JPQ322200100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42d3d0e2eab37d570c448dcda9f981e9b5ef089c52fd6da86416e4e6f262782. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/JPQ322200102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552864d9861e604f23291ac8354f159ee4d79d26283cfe2cbefc357c5a2497d5. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/JPQ322200103.
御霊と共に～謡えパライソ song by 少年・山田右衛門作・民衆
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4bb27482041a31a5aec2456d28c1702052a4190830732b5d75cbec65a16568. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/JPQ322200104.
戦う者の鎮魂歌−レクイエム− song by 松平信綱・少年・山田右衛門作
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57b026c6741649582f08c112db72d3449cb9f70e8d1c1faa264d1d9592d675f. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/JPQ322200121.
おろろん子守唄～消えた光 song by 山田右衛門作
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde3288668499970b7848a38afbbb619c757ca98c76db43977c48d5d6de764947. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/JPQ322200106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320cb18cfc00a2fd003ffb31e800ab315370df9ac8fc09fcb485a3159baf593a. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/JPQ322200107.
パライソ讃歌 鶴丸国永Ⅱ song by 鶴丸国永・大倶利伽羅・浦島虎徹・日向正宗・豊前江
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b29bffeca607dd7fee43398ab667d74f82b7d3ed1ea8eabb412308de21c08bf. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/JPQ322200108.
パライソ讃歌 浦島虎徹 song by 浦島虎徹・兄・弟・民衆
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a719429e2d511bce7b9260a879971a76bc3988c68118f93295dcf7e15068c88. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/JPQ322200109.
右衛門作音頭 song by 山田右衛門作・浪人たち・民衆 voice of 日向正宗・豊前江 - 千秋楽バージョン
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf464b9f92661aed2cc8d890c757dbba6a21da428c2e7e9dc3302996e02f2693d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/JPQ322200110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad59df22299a63956ea6ab4f95a95d479d57c3e4aa57c19460db46c9fe11c5f3. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/JPQ322200111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd643bc4228432376e607b539bdcfbb2b1d1a09ce2feaeaf83a49b07007fa67. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/JPQ322200112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc7e168336eb91b58927a7989093c4695941caf0fb34a63abcab8dd5a4b6ae5. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/JPQ322200114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf682fa8cfbe99a2c150c5b8505ed83fdf7c26a23c019ccbdc921aebe50038db. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/JPQ322200115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567092a6a8a4de29bce2689dc6a2e425566c4e80e234f654a7ccfd34d7177bb0. 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/JPQ322200116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094d799619293a4c865c4fdb41359dd21ea0c7b1c2ffd07dd458cbcb3a19e8bd. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/JPQ322200117.
おろろん子守唄 song by 山田右衛門作・鶴丸国永 - リプライズ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe50009b67d014b5b9ea05cef42b9aec281da727cb093695a145e678aa73cabf. 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/JPQ322200118.
海は ただ そこにある song by 浦島虎徹・日向正宗
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f87c3fc121cd39db12a10efef53358238c55d86a76fbadf0762c2aab6b65a0. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/JPQ322200120.