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 0xa000a1bb50645f86538e9599f446b6a771adba8989ec6f6ab2b179f9fff9df2b. 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/f602df0c-6046-46d5-ab59-79ee2bf8eddd.json and https://artists.proofprofile.net/proofs/artist/f602df0c-6046-46d5-ab59-79ee2bf8eddd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
はじめまして・・・かぐや姫フォーク・セッション
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 0x664e09fd49efed77f2337d04753f2d869c340ccc2192616e6b0fea408ffda1b4. 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/JPCR07200990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0614d5bf417dbade1bb1e8ee8d7a84fbc1234ce647c9242f2bc0a9f13bc29275. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/JPCR07201000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fdf404f3831be2aa3411fa4f0f487c961240ffadb1d3d05a8b3c492300d0ce4. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/JPCR07201030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7155e8b57724235af5da3fd8b629a703177c687cb1779ac41983e182c52df469. 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/JPCR07201530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa3f53f4de0605f2dec393493207c96126ee9c73143ba405db24fb84ae797cc0. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/JPCR07201510.
かぐや姫おんすてーじ -こうせつ・パンダ・正やん-
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0e33bfecef0d7086465f5c63154e57c3db0a5d28554004e9c06a2836254c3c9. 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/JPCR07201050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371c211cce58285ce1311940414281cd7c46fdeb8122bfcb6aefabad186ad8a3. 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/JPCR07201060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe2d894acc7cb529af89afe8bd051a94c3f0326462b8aa1fabb7225bbab0300. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/JPCR07201090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ef2d99608bb196abe519fc3fb3b60e95df9c423b1ab2e40c80f687f195d892. 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/JPCR07201100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b90ae65a1de9293c6977e4937068b95c17f12ca33987ab689f8037b95898bad. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JPCR07300400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7eb63e5154e9b2f248899b81af32882f469667dbf6894f682399a3bdff32bc. 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/JPCR07300430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffea275abab95e73da68d0a9d7338a92d281b7461cefc4cf03b72a80864606c9. 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/JPCR07400590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e556ffe28599b4a9cbaf724ff52e95986631c8d2e29652b2b4f6e0b761b099. 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/JPCR07400610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb3b88f1e543beef4b494291a3bbee1fb125520667829f7db729ce36ccc96299. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/JPCR07400630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d09e21380e7e0ec7a68eb5c657cee912cf4e7838a23ffd96ad6da3ca80c7d6a. 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/JPCR07400670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b8f07e3ce615cd3a1bcf5a1664dbac9803b763fcd03012ee8fddbaf6e2b544. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/JPCR07400850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892b69b8d7119221f5b086ffee4911f96444e3948146bc22c4b57f55ca02ae7c. 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/JPCR07400870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe78c2f183f3d63e9b115cd4ab18c159c9e698887be3bb67908561e4cd456d6c1. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/JPCR01301430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfadc79648d32de53ee46c7cdf56ddfc528073bb4b4e8abb1088a68e152d25e5a. 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/JPCR07400900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30252eb001b789cc319131d54331fb037557af2879e5bfeba5e653badd685ad5. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/JPCR07801260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55818ca0e6b088c1131750095f673db605944ae291a4c97345a89a3b74582f4a. 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/JPCR07801280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ab79d5a523e87d07eba7d5b563b2c1a3d5e374054147cc506b554685086069. 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/JPCR07801300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e1812a496cf71936f6d207f38c6461f1b9ad1b00a11be39b2246a9a930425d3. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/JPCR07801350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4314fa8e76f4f3bda8bd5cd9c06155cf757f0bd85be9cc32d3faf30c4c5f08a4. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T07:21:40Z), 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/JPCR07801360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1132579a94fd009115a50e833d90341afb1e7677a9cca0a7e0facad3a1fc88bd. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/JPCR07801370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4314fa8e76f4f3bda8bd5cd9c06155cf757f0bd85be9cc32d3faf30c4c5f08a4. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/JPCR07801360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e74f3a200c59594e289b0369a11807bf6dd5fcb0ae275e8935f1f33be41bfca. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/JPCR07400640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50fcf7ed0bdb1fff592ab1055db504119a8340fc76cc2c66828386e1f5905c9e. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/JPCR07300380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f1deb405666b6c0a070979b1957e5caf9705edce3986fd3e174fa641cad34b2. 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/JPCR07500740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x504c24894dc2a6a73c9f6aa3e00071b56e3b57c91931e7ff5a20cb61bd4bc840. Chain 2 (Bitcoin): anchored in block 957705 (2026-07-12T12:50:42Z), 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/JPCR07500770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x258f382aeb85fc075b4e36c0d2abebf9abfad56ff557fe0df8e0348f0082bbef. 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/JPCR07300440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c36512a71645fc3356e3c7792746bc332fbfc9ae1223133a8b5150fdaf18e1a. 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/JPCR07400550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb2fce257f812006b12847c5ffae57445ba69ac42c726557aff9f9816c1e8a8. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/JPCR07400200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59665d9cfae0f7b87e1033d7a9e9c5b0d52db15cff538a3f7e4b4a1b4a9ed544. 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/JPCR07500730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7940b2f5ac7ea7469aecc2fc73cf7d1333e304b57af38ce194d2f290a20f8176. 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/JPCR07500750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffea275abab95e73da68d0a9d7338a92d281b7461cefc4cf03b72a80864606c9. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/JPCR07400590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd65b8034a35fa5e988e65f114f1ec737b21a9554135bdc96a4e98a3a746c5fd. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/JPCR07300390.
かぐや姫 シングル・コレクション
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dacd72a5b230dacd9eb88a4c040703fa0e4dc610023a44020b2ffcf4f12813d. 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/JPCR07107150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1fbe403eed8b5344b7b18f5a7a2c3de8aebd2eee94b01da513f07fe257e033. 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/JPCR00008590.