Yuka Ueno (上野 優佳, Ueno Yūka, born 28 November 2001) is a Japanese fencer. She won the silver medal in the women's foil event at the 2019 Asian Fencing Championships held in Chiba, Japan. She also won
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 0x5531681c30f2f3c0a48ed0b35bc3474cd9fdf023d77ded89603768de39ef6661. 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/20a73358-f232-4141-9646-104321481138.json and https://artists.proofprofile.net/proofs/artist/20a73358-f232-4141-9646-104321481138.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 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 0x9af03051814220f54c4fe2c6dcc1d95fb2c23446721573e60a8a4b23fc03126e. 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/JPKI01312961.
Diamond days～ココロノツバサ～/Dear my hero【Type A】
好きになってもいいですか?/大切なあなた<TYPE-B>
好きになってもいいですか?/大切なあなた<TYPE-A>
星たちのモーメント/スローモーション(通常盤)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d36f97eea49589a89149d1fccfc216aac211cd6d48a7329e156294cd8b03db0. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/JPKI01419288.
ただ､あなたのそばで/あたたかい場所<通常盤>
好きな人はあなただった (初回限定盤)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a20d59ef34d4d3bb92ae724d725c4fa4ab3980c4924562be1adb4a543e941cf. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/JPKI02010750.
こっちをむいて/迷子/あなたの彼女じゃないんだね
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f06a5625eeb5a6c4ed3390ae1b7be9a9357e0a7a1a0b778f8beb1781ca24eb3. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/JPKI02011310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6cba4ff82c55a4c50f7ba3d2391a84e051c3998e32b662ecd7729f79b2bdfc0. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/JPKI01917065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41058d0809e435c884a22a411f496af0f47cefef7472bc8f7ebaaa74066bc9a. 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/JPKI02011313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d1571fab02d82603755c79d5c8b9e7b84554e129796d727492f93100f1efd5c. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/JPKI02110740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302e32e026ac829b00826de3f596ca0088d4c3536e38f768423fd0828d9d0637. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/JPKI02111677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc95e5f9e0a0692b101ab803980c18f08cc59765f9dddae587931ef5956718b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPKI02310539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a98105fccf446490323089453dd9b743dbdfcc19f47bf3cd9d664d0abc7625. 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/JPKI02215072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44dea5dec209ecd06adc963ef3dddbef5a9dcdcf792a595a33e299fb59805ced. 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/JPKI02210706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf6de381412c6d6e8c407054913066b63ece51762fabedfc7019aeb95c922ed. 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/JPKI02315477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf6de381412c6d6e8c407054913066b63ece51762fabedfc7019aeb95c922ed. 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/JPKI02315477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a3fed515f562ba8e6d6bd5d057eb88243b4a527084fe956c370066dc3e3d48. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/JPZ922205616.