(born 24 July 1963) is a Japanese former pop idol, singer-songwriter, and composer who was active in the 1980s.『別冊近代映画 河合奈保子特集号』（近代映画社刊 1981年） Kawai was from the same generation as Seiko Matsuda, Yos
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb1ec8298c22834cdbdfb5dec073e2a1fddf57e0f042f9aa488d186ba558377. 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/3ed11b4b-7d13-48fa-9b0f-166857ca8030.json and https://artists.proofprofile.net/proofs/artist/3ed11b4b-7d13-48fa-9b0f-166857ca8030.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e463c6c7d29358c3245dddf6a4d9e1e790a5a3573a9597ef46a38bf8bdc4a9. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/JPCO08426230.
スターダスト・ガーデン〈千・年・庭・園〉
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5866922884034e9bb33f84bde1280adbeb4017a666bc34328bc7e30e8fbacdf8. 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/JPCO09012840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e49d1b3a86980560037480524744044be1cd2b8a412a78b1423e1f1418ae5a. 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/JPCO08293480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04860f5fbace105ac7fc8f5d905c58c87d83bef698fae12cf719077997dc3a0. 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/JPCO08293510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11599378850776d34768742e96c6e6fc2c667fac8b4b9582a5713ab74c2687a1. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/JPCO08420440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9636af74821e2e671f101b12a34f0647b3a04fe7b8365669e447bc39998869. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:43:47Z), 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/JPCO08403440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb007c7af4b4334484f15a186e29602935915e19a2d6f7fcea90f0946335128a3. 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/JPCO08331200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38c1101a8f4cb34857c3a7af2d426adee4aa94e820a71f766c1a5ca709d8a47. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:25:40Z), 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/JPCO08318750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb34c3e6cd80f16f61b559514952bc52b3beb8ae448b98971b68d8a8bc94d9dca. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/JPCO08318780.
“極上アイドル特盛”シリーズ 河合奈保子 Vol. 2
“極上アイドル特盛”シリーズ 河合奈保子 Vol. 1
河合奈保子ゴールデン☆ベスト 〜A面コレクション〜
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a40739fc8805ab1401470e594d75583127a2c2a9273464f47892065f19c1cb. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T13:52:50Z), 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/JPCO08018590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be50cd6482a5df1265733f9085c219be962b590831413ac24829227af7d0769. 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/JPCO08513620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf61b6291bce8dc8951ea00d91fdd6859c78eae5a3e4d73e70a976f319ed4ac1. 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/JPCO08019360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2b16744c9a8625964ea2183271a7c2a77a22fd1864d2a8eb1097a691cb44ea. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:29:34Z), 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/JPCO08541380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a0b7b1f1d0188854091a4e31ff63e2ac88735c53540b4a42196e09ce04122c8. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/JPCO08110260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c0b0c3bbebe2bb097eeda48e84b232b9b4262e398fb1ed4fdc4c77d8742e92. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:03:47Z), 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/JPCO08630290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb045f1de8d131c7eb1b388fb25f47bf33c965585189dff8ddde7cbfc3156b1fb. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/JPCO08110880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe427c4b38485af35e1fc98a68b4a2b28efcfff62bb38f0c7c2f036107d0bfd42. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:28:35Z), 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/JPCO08727860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x517fa1524886c24dd2d9cdb8c1de89d205ac2789a8145ce1f1fa61173300c3cc. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/JPCO08215090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c0fd04cfb1685ff64f09f20e220ab6d535510da278e59c609be4bf41784bca8. 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/JPCO08330940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7637a1f3c6183674fb0fa6b41c28afa4474ba7f52fc4394f81b8de691319fbd. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/JPCO08331850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x279769b2358c70f0631ec0216106ff6bc715c63016f9e29e64049b1169c74edf. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/JPCO08435590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30fca26af36da09ff7bd4f23bcc4ee52bcaa0323b99ca974a5c0596a57c909d1. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/JPCO08435830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f39822492aef1e865b48f43a5ead85e10672ab30c2fd419b36670c3507ab0c0. 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/JPCO08412660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4656e992ed4b90b3377744f26cdbdac38acae24f686c38549a52883df80dc3f9. 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/JPCO08527000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0aef83a59b48d5adc04d4ec902259e797ca9a8b01bf8693b0a00a3efc9604ce. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/JPCO08331190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3573c00453f4d9d7825e47198b9a0fd49e9c42d37134c7a711cc3cbcc1abd5. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:50:46Z), 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/JPCO08110520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8612415bcc2441cf13d94f6cfe02fac2bbcbf48980052351d14db279bbf4bb54. 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/JPCO08435600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3573c00453f4d9d7825e47198b9a0fd49e9c42d37134c7a711cc3cbcc1abd5. 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/JPCO08110520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7578c0c2be2e8f7dcbf2ea4fb06f3a9956e2c03817f8f0686d9fe96e3ddd8d0. 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/JPCO08215870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0aef83a59b48d5adc04d4ec902259e797ca9a8b01bf8693b0a00a3efc9604ce. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-16T00:27:04Z), 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/JPCO08331190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe62af2a6c4e024a546376608343141e2109ab71faf8f41b2c6d7f163cdcac123. 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/JPCO08331510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11599378850776d34768742e96c6e6fc2c667fac8b4b9582a5713ab74c2687a1. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/JPCO08420440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ebb5e5aa027db54e177627fd90090011b8b91900cfe99536d7cf3ae0f3e42d9. 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/JPCO08501250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2b16744c9a8625964ea2183271a7c2a77a22fd1864d2a8eb1097a691cb44ea. 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/JPCO08541380.