Yuka may refer to: Yuka (music), an Afro-Cuban style of music Yuka (mammoth), mammoth specimen found in Yakutia, Russia Manshu Yuka Kogyo K.K. Ssuningkai, a Japanese-German pre-WWII industrial co-ope
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 0xe24884792e6a8d54e8898a98b3887616b4e851f32ac703e5a0a28ee53f1856c1. 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/0c58bf26-180c-4a63-a237-929a7d5ba783.json and https://artists.proofprofile.net/proofs/artist/0c58bf26-180c-4a63-a237-929a7d5ba783.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
ヴァイオリンとピアノで聴く シャンソン
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a51228202153bd360d67f862e7bd266b64c1becc6434a53be8b270e502d381. 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/JPE640300175.
ヴァイオリンとピアノで聴く 映画音楽 (アメリカ編)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7412a49ddf5d72bd0ce19d1ca0a0c4236c24d4a4ab023fbfe16d63978d2c83. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/JPE640300155.
ヴァイオリンとピアノで聴く 映画音楽 (ヨーロッパ編)
宮崎 駿の世界 (ヴァイオリンとピアノの調べ)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23ee512d7857199b7433f8f551a525b15e55c8dadece8abc128aebf52463402. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/JPA790601711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec81c4a3b9718a42d774adcec1ca4caa53ace37d6cf98308d2abb9ffd919ddc8. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/JPA790601718.
宮崎駿の世界 (（ヴァイオリンとピアノの調べ）Vol.2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8d7b38f568718f85c649d825b68160dfc59829080e92ce59f14eeffd4e80f0. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/JPE640800000.
やさしさに包まれたなら（魔女の宅急便）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b22de69d6fda28d286a8c2523ab13b18ea5bd1f1b9332a0f6e4a8021f292f31. 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/JPE640800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb4028c7955a0a1f92a79fb748fa44917616632c2f1743c6d2f9982c30098185. 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/JPE640800004.
Ghibli's World Best 10 with Piano and Violin
ジブリのせかい ヴァイオリンとピアノの調べ
ジブリのせかい ヴァイオリンとピアノの調べその２