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 0xaafc5a1703ba9f9d1de5d796c138c7ac4efa313bb492998c288cb57915b776b0. 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/83db9744-45d2-4463-9ee5-3053c1957068.json and https://artists.proofprofile.net/proofs/artist/83db9744-45d2-4463-9ee5-3053c1957068.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
PIANO DE KIKU YORUNIKAKERU YORUNI KAKERU Piano Cover
PIano De Kiku J-POP Ultra Hit 1 J-POP ULTRA HIT SONG PIANO COVER VOL.1 J-POP Ultra Hits REIWA NO KYOKU
ピアノで聴く J-POPウルトラヒット１ J-POP ULTRA HIT SONG PIANO COVER VOL.1 J-POP Ultra Hits 令和の曲
PIano De Kiku J-POP Ultra Hit 2 J-POP ULTRA HIT SONG PIANO COVER VOL.2 J-POP Ultra Hits REIWA NO KYOKU
ピアノで聴く J-POPウルトラヒット２ J-POP ULTRA HIT SONG PIANO COVER VOL.2 J-POP Ultra Hits 令和の曲
PIano De Kiku J-POP Ultra Hit 3 J-POP ULTRA HIT SONG PIANO COVER VOL.3 J-POP Ultra Hits REIWA NO KYOKU
ピアノで聴く J-POPウルトラヒット３ J-POP ULTRA HIT SONG PIANO COVER VOL.3 J-POP Ultra Hits 令和の曲
ピアノで聴く J-POPウルトラヒット４ J-POP ULTRA HIT SONG PIANO COVER VOL.4 J-POP Ultra Hits 令和の曲
PIano De Kiku J-POP Ultra Hit 4 J-POP ULTRA HIT SONG PIANO COVER VOL.4 J-POP Ultra Hits REIWA NO KYOKU
PIANO DE KIKU CHOU NINKI ANIME THEME SONG SERIES 1 ANIME THEME SONG PIANO COVER VOL.1
PIANO DE KIKU CHOU NINKI ANIME THEME SONG SERIES 2 ANIME THEME SONG PIANO COVER VOL.2
ピアノで聴く 超人気アニメ映画 主題歌シリーズ１ ANIME THE MOVIE THEME SONG PIANO COVER VOL.1
ピアノで聴く 超人気アニメ 主題歌シリーズ２ ANIME THEME SONG PIANO COVER VOL.2
PIANO DE KIKU CHOUNINKI ANIME EIGA SHUDAIKA SERIES 1 ANIME THE MOVIE THEME SONG PIANO COVER VOL.1
ピアノで聴く 超人気アニメ 主題歌シリーズ１ ANIME THEME SONG PIANO COVER VOL.1
ピアノで聴く 韓流ドラマシリーズ１ 梨泰院クラス ITAEWON CLASS SOUND TRACK PIANO COVER
PIANO DE KIKU KOREAN DORAMA SERIES1 ITAEWON CLASS ITAEWON CLASS SOUND TRACK PIANO COVER
PIANO DE KIKU CHOU NINKI ANIME THEME SONG SERIES 4 ANIME THEME SONG PIANO COVER VOL.4
ピアノで聴く 超人気アニメ 主題歌シリーズ４ ANIME THEME SONG PIANO COVER VOL.4
PIano De Kiku J-POP Ultra Hit 5 J-POP ULTRA HIT SONG PIANO COVER VOL.5 J-POP Ultra Hits REIWA NO KYOKU
ピアノで聴く J-POPウルトラヒット５ J-POP ULTRA HIT SONG PIANO COVER VOL.5 J-POP Ultra Hits 令和の曲
ピアノで聴く 超人気アニメ映画 主題歌シリーズ２ ANIME THE MOVIE THEME SONG PIANO COVER VOL.2
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 0xc1dd690c33cd52f3b1943e09924daaee75e8490b82421509ed1940e261e92f2f. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/TCJPT2239720.
PIANO DE KIKU CHOUNINKI ANIME MOVIE THEME SONG SERIES 2 ANIME THE MOVIE THEME SONG PIANO COVER VOL.2
WE ARE (Piano Cover) [10th anniversary version]
PIANO DE KIKU SPORTS ANIME SONG SPORTS ANIME THEME SONG PIANO COVER
ピアノで聴く スポーツアニメソング SPORTS ANIME THEME SONG PIANO COVER
J.S.BACH GA FUMINSHOUNINAYAMU HAKUSHAKUNOTAMENIKAITA GOLDBERG VARIATIONS
J.S.バッハが不眠症に悩む伯爵のために書いた ゴルトベルク変奏曲
ピアノで聴く J-POPウルトラヒット６ J-POP ULTRA HIT SONG PIANO COVER VOL.6 J-POP Ultra Hits 令和の曲
PIANO COVER Nostalgic Youth Song Collection!!
Piano De Kiku J-POP Ultra Hit 6 J-POP ULTRA HIT SONG PIANO COVER VOL.6 J-POP Ultra Hits REIWA NO KYOKU
プリーズ・ミスター・ポストマン (Piano Cover)
JAZZ PIANO ARRANGE DE KIKU CLASSIC NO MEIKYOKU Classic by JAZZ PIANO ARRANGE vol.2
ジャズピアノアレンジで聴く クラシックの名曲 Classic by JAZZ PIANO ARRANGE vol.1
ジャズピアノアレンジで聴く クラシックの名曲 Classic by JAZZ PIANO ARRANGE vol.2
JAZZ PIANO ARRANGE DE KIKU CLASSIC NO MEIKYOKU Classic by JAZZ PIANO ARRANGE vol.1
PIANO DE KIKU J-POP FUYUUTA TEIBAN SONG vol.1 J-POP WINTER SONG PIANO COVER
ピアノで聴くJ-POP 冬歌定番ソング vol.1 J-POP WINTER SONG PIANO COVER
AINIDEIRUKOTOHA MADAARUKAI (Piano Cover)
PIANO DE KIKU J-POP NATSUUTATEIBAN SONG vol.1 J-POP SUMMER SONG PIANO COVER
ピアノで聴くJ-POP 夏歌定番ソング vol.1 J-POP SUMMER SONG PIANO COVER
Reiwa hit songs Piano cover Drama theme song (Piano Cover)
令和のヒット曲 ピアノカバー 映画主題歌 (Piano Cover)
令和のヒット曲 ピアノカバー ドラマ主題歌 (Piano Cover)
Reiwa hit songs Piano cover Anime theme song (Piano Cover)
令和のヒット曲 ピアノカバー テレビで聞くあの曲 (Piano Cover)
Reiwa hit songs Piano cover That song you hear on TV (Piano Cover)
令和のヒット曲 ピアノカバー アニメ主題歌 (Piano Cover)
Reiwa hit songs Piano cover Movie theme song (Piano Cover)
JAZZで聴くクラシック ~Jazz Piano Cover vol.1~ (Piano Cover)
JAZZで聴くクラシック ~Jazz Piano Cover vol.3~ (Piano Cover)
Classical listening with JAZZ ~Jazz Piano Cover vol.3~ (Piano Cover)
Classical listening with JAZZ ~Jazz Piano Cover vol.1~ (Piano Cover)
JAZZで聴くクラシック ~Jazz Piano Cover vol.2~ (Piano Cover)
Classical listening with JAZZ ~Jazz Piano Cover vol.2~ (Piano Cover)
Reiwa hit songs Original piano cover BOYS SIDE (Piano Cover)
令和のヒット曲 オリジナルピアノカバー BOYS SIDE (Piano Cover)
独りの時に聞きたい ゆったりピアノ (Piano Cover)
I want to listen to it when I'm alone "relaxing piano" (Piano Cover)
令和のヒット曲 オリジナルピアノカバー GIRLS SIDE (Piano Cover)
Reiwa hit songs Original piano cover GIRLS SIDE (Piano Cover)
KOKOROWO KARAPPONISHITAITOKINIIKU PIANO DE TSUDURU REIWA NO HIT SONG (Piano Cover)
心をからっぽにしたいときに聞く ピアノで綴る令和のヒットソング (Piano Cover)
夜空を見上げながら聴く ピアノバラード コレクション (Piano Cover)
YOZORAWO MIAGENAGARA KIKU Piano Ballad Collection (Piano Cover)
AMENOHINIKIKITAI KURASIKKUNOMEIKYOKUWO JAZZPIANODE (Jazz Piano Cover)
雨の日に聞きたい クラシックの名曲をジャズピアノで (Jazz Piano Cover)
Piano De Kiku J-POP Ultra Hit 7 J-POP ULTRA HIT SONG PIANO COVER VOL.7 J-POP Ultra Hits REIWA NO KYOKU
ピアノで聴く J-POPウルトラヒット７ J-POP ULTRA HIT SONG PIANO COVER VOL.7 J-POP Ultra Hits 令和の曲
PIANO DE KIKU CHRISTMAS TEIBAN SONG STANDARD CHRISTMAS SONG PIANO COVER
ピアノで聴く クリスマス定番ソング STANDARD CHRISTMAS SONG PIANO COVER
Merry Christmas Mr.Lawrence (Piano Cover)
All I Want for Christmas Is You (Piano Cover)
Christmas carol No Koroniha (Piano Cover)
＃ピアノで奏でる名曲 YOASOBI best songs (Piano Cover)
#Piano Melodies YOASOBI best songs (Piano Cover)
＃ピアノで聴く 令和のウルトラヒットベスト REIWA ULTRA HIT BEST PIANO COVER (Piano Cover)
#Piano de kiku Reiwa no Ultra Hit Best REIWA ULTRA HIT BEST PIANO COVER (Piano Cover)
DAKARABOKUHA ONGAKUWO YAMETA (Piano Cover)
ピアノで奏でる 真夏の定番JーPOP A COOL SELECTION OF SUMMER J-POP PIANO COVERS
J-POP Summer Classics Played on Piano A COOL SELECTION OF SUMMER J-POP PIANO COVERS