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 0x65834e778b31e78c4aa22e756a5c050e724c78867202698c6ab7f58dd824bf2d. 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/f36b3e88-89ad-4496-9607-4356822abcab.json and https://artists.proofprofile.net/proofs/artist/f36b3e88-89ad-4496-9607-4356822abcab.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Touken Ranbu：The Musical TSURUMARU KUNINAGA OOKURIKARA DUO PERFORMANCE 〜Shunpu Touri no Sakazuki〜
ミュージカル『刀剣乱舞』 鶴丸国永 大倶利伽羅 双騎出陣 〜春風桃李巵〜
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 0x906f6224ad7e407580eb4c12994d48d5dac587fc3fd9da2429f265c50ca7aaab. 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/JPQ322300095.
ミュージカル『刀剣乱舞』 鶴丸国永 大倶利伽羅 双騎出陣 〜春風桃李巵〜 (通常盤)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ff4057a3b416c736db315cccc00e7569b5fd252a2bb1f0f9c803c7e2471fdb. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/JPQ322300065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dcdf674ab01470ebfb7ee801ec7a1e625f00286f3385929d16460840d33c61e. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/JPQ322300066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b93e4eaa6fc924cad79dfd1e2f6b768160ee2fe4908cac779f494e3bff6df1a. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/JPQ322300067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8699b004c883d01d0178552e746125906eaf00334111d2f2b84481aaf6a7f994. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/JPQ322300068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450b59c23558d1089e56b47082689eb72c9665d8c79e3e8c8941cdaa72fc2def. 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/JPQ322300069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d893cf9d3fd78b8443eb07728f3d48d83201ac1d37990b910866d843ea000d. 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/JPQ322300070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd52c7cbd62c2e9cc22aca2d331786b795f5ac0fc7719f9438d8249cec01992e. 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/JPQ322300099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f48a04a4da3ba84280a4dea1732c434ab303e09c6578340281647ec01ad8a4. 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/JPQ322300071.
ひねくれ説法 song by 鶴丸国永・虎哉宗乙・梵天丸
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e7378dac41e7f9da9b86a360d1d7ad8e0b82d04af10fa33e94babb53c24955. 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/JPQ322300072.
ことはじめ～私の武器 song by 梵天丸・伊達政宗・鶴丸国永・大倶利伽羅
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7515a944ecbe3bf9d9647cc7c3e05d10a239a3ac80aea981829d0da8857e666. 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/JPQ322300073.
飛脚はしる song by 鶴丸国永・大倶利伽羅・伊達政宗・虎哉宗乙
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413019ae9ba049f15f9074cd16d06fae9d58389b0074d987842a39da6c877761. 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/JPQ322300075.
埋まらぬもの／伊達政宗 song by 伊達政宗・鶴丸国永・大倶利伽羅
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac4fc05d00b911e30c565d6297f85f941a8b95dd7ee35470b69e2e388a87039. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/JPQ322300081.
御守りと武器 song by 鶴丸国永・伊達政宗・梵天丸・虎哉宗乙
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d602264d803eb2bbe7d4a530421179d214154463d4f54768f5c8811fd69d9b. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T13:39:11Z), 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/JPQ322300082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c5159fac401bdf4a98091e7a087371378f6e3b5f8317ac8cc1e53f43759b33. 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/JPQ322300083.
月よ 朧気であれ song by 伊達政宗・鶴丸国永
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2300438c6c1445999cf70522e0580ff1fb20416e0e2f77fbf92dbf2e79d96635. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/JPQ322300084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb449cba2f6dbaa97185c107dc9bd02d833d7fd6b422c33841e1e1f551ce3ee40. 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/JPQ322300085.
終の野望 song by 伊達政宗・支倉常長・鶴丸国永・大倶利伽羅
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50c099a50cf5143cc3317af0d145ff811ede072d86f7f9dd7a991745a6a6e33. 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/JPQ322300086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf66fd32ceda7b35a675176a4b39bb1a03dc498df185cbf967312eefe5b71549. 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/JPQ322300087.
悔いなき希望 song by 鶴丸国永・大倶利伽羅・伊達政宗・支倉常長
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c0be418d4233c7f64aa2742c1ceb9bef56f8de7783957a8f2b24e3ef0a59b4. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/JPQ322300088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x221deb14d2cee18b69fae0a68166df97844b9b86980ad87c57a657225d9b8390. 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/JPQ322300089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1550c02f8b5bb21faf2f06b0aa0ef6c703d2c414fd7a8c1fd6dbbcb511edc79e. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/JPQ322300090.
辿った先 song by 鶴丸国永・大倶利伽羅・梵天丸
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12bf44d29e37d7b9e3d0f8f7b62de7c3a476f34b8968cb6d64ff7521cbf08a54. 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/JPQ322300091.
Touken Ranbu：The Musical TSURUMARU KUNINAGA OOKURIKARA DUO PERFORMANCE 〜Shunpu Touri no Sakazuki〜 (Tsujoban)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28625b1adc799de82dfb95dc87f939820a6a77e8ca6620848f7a50d963c8ab6. 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/JPQ322300094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x906f6224ad7e407580eb4c12994d48d5dac587fc3fd9da2429f265c50ca7aaab. 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/JPQ322300095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eff03c68fcf83e6fb1abb2907feaab86779693f9c03665aebd9d63eeea3eeeb. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/JPQ322300096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e456aa4894a89be9d4579ed9587d0d2377d6ba82f723a073a73c03fb6d98a56. 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/JPQ322300097.