is a Japanese singer and actress. Under her former stage name , Sakai released her first single, on February 5, 1987, nine days short of her sixteenth birthday. Over 40,000 copies of the single were
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 0xec761dd5a58f2123855d9d3fa28535aa9f6074c221b4c50bf56f360ecce36612. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a82e92f7-6629-4c87-bd51-2589b001837f.json and https://artists.proofprofile.net/proofs/artist/a82e92f7-6629-4c87-bd51-2589b001837f.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 0x72873b31a0c12a0393ba8b22be12ff3da7157ce62f874850e48df7f1c6bd9b1e. Chain 2 (Bitcoin): anchored in block 957611 (2026-07-11T21:33:50Z), 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/JPVI08700990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da5c24bb1577a5287c2b16d6eee3a09ad601358be62aacf77e414ccb2744ece. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/JPVI08801340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2e93f9b0730ff0fffa8304aeec2544fe37481eae629c79feb09a85a93fd326. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/JPVI08801360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4715fca9435877f9a986c0a4d4cc11bfa258923be9a2765ff47171f624612cde. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/JPVI08801470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0f7790587b8b3a505cb6ef2c3278693d6d1f7345c1b83666f1a20896d1bd20. Chain 2 (Bitcoin): anchored in block 957608 (2026-07-11T21:00:50Z), 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/JPVI08801480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d60bbba7bb39984a8aa431e9e91cbacd72a5268bb1f3ed1c1c4cf9c247229b. 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/JPVI08801550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9e39c3cd080a198b46d608cc06ed99c1926836fdd0a51e03c386a5abd80f80. Chain 2 (Bitcoin): anchored in block 957616 (2026-07-11T21:52:36Z), 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/JPVI08800030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb68e069002b5a7fe5b339bae8d4e46e8697f44c2e0fad08536985117716f1d. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:34:00Z), 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/JPVI08900660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94331806e44a2d01c2929d592c9e2784e7fa9427348deea9fcb1c06121bfe64. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/JPVI09003930.
マジカル・モンタージュ・カムパニー
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecdd574e5161a37686797eeb5b68144ff1d6c4fa7b2b0045cc25f1ee1947fdc2. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:18:36Z), 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/JPVI09100440.
渚のピテカントロプス - マンモス・バージョン
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c143951d7e1244ca7021dc530748250f7db7bb1cb330c014d89ff3af9461df. 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/JPVI09211440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b245fed816d1a476cc12487735f628e1966db3519163512aabac107686f8120. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/JPVI09201390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2fb4eed72e73cc995a636315923a83bbf605394de29df7f0c6e87899072210. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:49:31Z), 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/JPVI09603390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d63417ce1e4bf2674a9731da0202c9cdd72e38429280925ecf58c2883d63ea. 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/JPVI09439350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d1c75f6d22a49cc4b19e75a35caebf0919fe3e921e643e529a05db4ab9ca99a. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T03:00:54Z), 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/JPVI09807470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42aced434b57bba8e27f6ff54e7e4e9ec17da5c91ebcf23515f21c8633a31046. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/JPVI00335270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92684a9b67e28ec3be40faa610fb376c43a0205b040f5b8168f7efa3a9a2c021. Chain 2 (Bitcoin): anchored in block 957613 (2026-07-11T21:37:58Z), 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/JPVI09716020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b4ac522f15cedb6ad3a262479fc6bc750d929d45adac1963285aadc9e7921f. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/JPVI09906090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895aba8f9a927f575c47941b99e212822caf9233b2b54dc24fa5447a0c308bf7. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/JPZ921509175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95bb8d46d0b6f8aebe21d067210485ffdfa63c9a5f9c805c065e0a155bfb508a. 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/JPZ921509179.
The Best Exhibition 酒井法子30thアニバーサリーベストアルバム
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5622be57a78afd010cadc6b31018458eb02100ebae202f6ba9104d00c1c34329. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/JPVI08800020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727ce15d49e55bb5e76beb2c8360f86fa5f11a660c189cd663a474aef3ad761c. 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/JPVI08700160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbabf3e06fb9485aac07d046dfa64a765b80c4f84dff6c8496e670d8b0b92e60b. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:56:38Z), 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/JPVI08700380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89b35138d5e8f348962751f137cb986f82d632430a1d14f6ec6385580b5343f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/JPVI08900670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5622be57a78afd010cadc6b31018458eb02100ebae202f6ba9104d00c1c34329. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:29:25Z), 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/JPVI08800020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96bf4bbb7e3961c3616c192681fb8cab86deeb113278db77a211dd519e3434c3. 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/JPVI08600020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6747b704493210d751ee751acd34a5f7c0899ba8c208dea8b227eaca148259. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/JPVI08600170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b530765758c509230a49bef8b72adccd1ebcd493bf196f9596edc4d3e584c7c. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/JPVI08700150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b2fb5276009eb84b706c1b77c737ce6c00dff7d1271b5ee609a733d7cde571d. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:57:40Z), 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/JPVI08800060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb95f2e98013a2b0cc4958cc0f60536d8dcdde79b0a526c8e48cc243a6fb64e6. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/JPVI09508350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b2fb5276009eb84b706c1b77c737ce6c00dff7d1271b5ee609a733d7cde571d. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/JPVI08800060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2fb4eed72e73cc995a636315923a83bbf605394de29df7f0c6e87899072210. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/JPVI09603390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d1c75f6d22a49cc4b19e75a35caebf0919fe3e921e643e529a05db4ab9ca99a. 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/JPVI09807470.