1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 artist was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a865719e9f18e3c28e4f892b64f2904ebeb350a106e017ce1ef2d15cf61d1a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4cd8e89e-c9e2-4d0f-a934-540342d2a94b.json and https://artists.proofprofile.net/proofs/artist/4cd8e89e-c9e2-4d0f-a934-540342d2a94b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Kaikai Kitan ( From "Jujutsu Kaisen") [Piano Version]
Kaikai Kitan (Jujutsu Kaisen OP) Piano Arrangement
Homura (From "Demon Slayer Movie: Infinity Train") [Piano]
Gurenge (From "Demon Slayer Opening") [Piano]
Kamado Tanjiro No Uta (From "Demon Slayer: Kimetsu no Yaiba" Piano)
Touch Off (From "Yakusoku no Neverland OP" Piano)
Shoukei to Shikabane no Michi (From "Attack on Titan Season 3 Part 2 OP")
Memento (From "Re: Zero Season 2 ED") [Piano]
My War (From "Attack on Titan Final Season OP") [Piano]
Diamond no Jundo (From "Oregairu Season 3 ED") [Piano]
VIVID VICE (From "Jujutsu Kaisen" OP 2) [Piano]
Ashes on The Fire (From "Attack on Titan The Final Season" Piano)
Identity (From "The Promised Neverland Season 2") Piano
No.1 (From "My Hero Academia Season 5") [Instrumental]
No.1 (From "My Hero Academia Season 5") - Instrumental
Cry Baby (From "Tokyo Revengers") [Piano Cover]
Cry Baby (From "Tokyo Revengers") - Piano Cover
Kiss of Death (From "Darling in the FranXX") [Piano Version]
Kiss of Death (From "Darling in the FranXX") - Piano Version
My War (From "Attack on Titan Final Season") [Piano Version]
My War (From "Attack on Titan Final Season") - Piano Version
Easy Love (From "Ijiranaide, Nagatoro-san") [Piano Version]
Easy Love (From "Ijiranaide, Nagatoro-san") - Piano Version
Daddy Daddy Do (From "Kaguya sama Love is War") [Piano Version]
Daddy Daddy Do (From "Kaguya sama Love is War") - Piano Version
Kaibutsu (From "Beastars Season 2") [Piano Version]
Kaibutsu (From "Beastars Season 2") [Piano Version] - Kaibutsu (From "Beastars Season 2") [Piano Version]
Cinderella (From "Komi Can't Communicate") [Piano Version]
EVERBLUE (From "Blue Period") [Piano Version]
Kyoukaisen (From "86 Eighty-Six Season 2") [Piano Version]
takt (From "Takt Op Destiny") [Piano Version]
Akeboshi (From "Demon Slayer") [Piano Version]
Zankyou Sanka (From "Demon Slayer") [Piano Version]
Zankyou Sanka (From "Demon Slayer") - Piano Version
The Rumbling (From "Attack on Titan") [Piano Version]
Akuma no Ko (From "Attack on Titan") [Piano Version]
GIRI GIRI (From "Kaguya-sama: Love is War Season 3")
Dance In The Game (From "Classroom of the Elite")
Overlord of the Thunderstorm (From "Genshin Impact")
Tales From the Snow Mountain (From "Genshin Impact")
Lamentation Et Triomphe (From "Genshin Impact")
All The World's a Stage (From "Genshin Impact") [Piano Arrangement]
The Road Not Taken (From "Genshin Impact") [Piano Arrangement]
Shikairo Days (From "My Deer Friend Nokotan")
Natlan (From "Genshin Impact") [Piano Arrangement]
Kaijuu (From "Orb: On the Movements of the Earth")
Kaiju (From "Orb: On the Movements of the Earth") [Full Version]
百花繚乱 - Hyakka Ryouran (From "The Apothecary Diaries")
Lumière (From "Clair Obscur: Expedition 33")
Alicia (From "Clair Obscur: Expedition 33")
The Very Very Very Strongest (From "ONE PIECE")
Luffy's Fierce Attack (From "ONE PIECE")
Dark Dream (From "Lord of Mysteries") Piano
Shine in the Cruel Night - 残酷な夜に輝け (From "Demon Slayer") Piano
Demon Slayer Corps - 鬼殺隊 (From "Demon Slayer") Piano
Akaza's Theme - 猗窩座の過去 (From "Demon Slayer") Piano
Polaris - ポラリス (From "My Hero Academia") Piano
Entrance to Infinity Castle (From "Demon Slayer") Piano