1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0xb483f548c655f7e3212934076555958bbf655c348415b18bb5e93f6ab374c229. 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/d6cb01a9-346a-4ecd-8036-66a646930550.json and https://artists.proofprofile.net/proofs/artist/d6cb01a9-346a-4ecd-8036-66a646930550.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
「魔法戦争」オリジナルサウンドトラック
FlyingDog x C2Kikan <KanColle Memorial Compilation>
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. GET OTSBitcoinBlockVerifyURL → block OTSBitcoinBlock must exist at that height 3. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 4. GET OTSVerificationAPI → pre-computed 6-check result from server 5. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1efce4e6fa34508d4c0c59608d9a8e1dc9413276b14b06906839d7dbae7e90a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/2hCsE0BdLv67JWp4AKNLbC.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/2hCsE0BdLv67JWp4AKNLbC.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9dadee4193170188cc0417a5474cb7451a8cfdcc2e929809af38082e31fd076. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/1VAHkYoKqq4KEA0NGlU8Ib.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/1VAHkYoKqq4KEA0NGlU8Ib.
{"copyright_id":"0x5f92cecdf9b32f5c2082cd8a97fef212ea206ea0ae2ebd354b4480d1a1a25b14","isrc":"JPE502200102","name":"FIGHT SONG","registered_at":"2026-06-09T09:20:18Z","spotify_id":"4s1S0u7SjLrIEO7zNqWBbU","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f92cecdf9b32f5c2082cd8a97fef212ea206ea0ae2ebd354b4480d1a1a25b14. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/4s1S0u7SjLrIEO7zNqWBbU.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/4s1S0u7SjLrIEO7zNqWBbU.
{"copyright_id":"0x627692d97693d7177cd18a7dca59e19bc446aeb73f1b7f91ca7bdac05b545281","isrc":"JPE502200103","name":"We Are The Vanguard","registered_at":"2026-06-08T04:33:09Z","spotify_id":"1QCfXB2tszIuc5lkEMQbw5","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x627692d97693d7177cd18a7dca59e19bc446aeb73f1b7f91ca7bdac05b545281. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/1QCfXB2tszIuc5lkEMQbw5.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/1QCfXB2tszIuc5lkEMQbw5.
{"copyright_id":"0x113750cac19abe73fcf29d1989a69ea345c7873fd9e629d5ffd3f83dc79f494d","isrc":"JPE502200104","name":"Heart of Glass","registered_at":"2026-06-21T06:52:12Z","spotify_id":"2idAMupVepSNtU8AaAduHT","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113750cac19abe73fcf29d1989a69ea345c7873fd9e629d5ffd3f83dc79f494d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/2idAMupVepSNtU8AaAduHT.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/2idAMupVepSNtU8AaAduHT.
{"copyright_id":"0x9f54681a306babd5bee9e4ab04a74aab6508b48dac1adaaf62507c9465e8234a","isrc":"JPE502200105","name":"Let's Make Noise","registered_at":"2026-06-26T06:56:26Z","spotify_id":"7bFsLtDZsSCncNokkc1i5W","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f54681a306babd5bee9e4ab04a74aab6508b48dac1adaaf62507c9465e8234a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/7bFsLtDZsSCncNokkc1i5W.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/7bFsLtDZsSCncNokkc1i5W.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde33c49664531b95b418d39949213159825dbf677b9e9d6fbc1f7eda0c7c2bc. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/4W9SDWjU2Z561zNPPeaJzC.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/4W9SDWjU2Z561zNPPeaJzC.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e27b7fb5b99202694e46cdd9837c03710ed5413ed2f9d8d5d8a597cd23486e1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/314bFFS86HhejBKpeZ4LqK.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/314bFFS86HhejBKpeZ4LqK.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb77106a0b586f2e63d138a07df224e441cbe06e80d3b07126d63b3d64beed282. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/13fZRP1jZyR6ymNzI09dqd.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/13fZRP1jZyR6ymNzI09dqd.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ca141d51dc5cb7ea73f7123383365dc04643d149d757bd7fc6ecd2df18990d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/1fB6RAHj8ImYAgtkcjscY0.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/1fB6RAHj8ImYAgtkcjscY0.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a44a6ca3c9e49972de40c5b672b33a8e418ee2774431572e0ce7a3da7fb440. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/24cnyXSGusDfagE1cHbpXk.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/24cnyXSGusDfagE1cHbpXk.
{"copyright_id":"0xc4f6abf037fc5238e1bfbe783d3e141a5521ad1d1dc297aec355ed4bd7dfba92","isrc":"JPE502200017","name":"TRUTH 〜A Great Detective of Love〜","registered_at":"2026-06-27T09:23:22Z","spotify_id":"5YTxg79cinwpzFfv9HGkLh","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f6abf037fc5238e1bfbe783d3e141a5521ad1d1dc297aec355ed4bd7dfba92. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5YTxg79cinwpzFfv9HGkLh.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/5YTxg79cinwpzFfv9HGkLh.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb57f78d0201dee94f17ed5ef107a3bc17b9fe12a41a6a3a75f21bb35285b6b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5iMnPf1ZNtafzXxZkxQagt.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/5iMnPf1ZNtafzXxZkxQagt.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc413027c432945a6f84204e99b0f54af9c1b6b8e3465b2461e2fb14b3ddebc85. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6TFGtm1Vu53VlZRcpzTBot.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/6TFGtm1Vu53VlZRcpzTBot.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd388877b647f20b956d029b42827f796e65ca0ada49f49c8d37a80eb83d061e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/4vSUrLTbOESnDxGplqcety.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/4vSUrLTbOESnDxGplqcety.
{"copyright_id":"0xc4f6abf037fc5238e1bfbe783d3e141a5521ad1d1dc297aec355ed4bd7dfba92","isrc":"JPE502200017","name":"TRUTH～A Great Detective of Love～","registered_at":"2026-06-27T09:23:22Z","spotify_id":"3vhT6UbTEeBMXv19phuUuF","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f6abf037fc5238e1bfbe783d3e141a5521ad1d1dc297aec355ed4bd7dfba92. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/3vhT6UbTEeBMXv19phuUuF.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/3vhT6UbTEeBMXv19phuUuF.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54feb2797f4b15721a2e569d36a9c94103b76766f66166962e28577f13cab6c7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/09tajdDh2t9ClbciQiGmbo.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/09tajdDh2t9ClbciQiGmbo.