ShredDB is an experimental .shred library, I removed the audio so it's pretty useless. You can find the source .psarc files here.

Song	Artist	Play	Shred	Length	Album	Year	Tuning	Uploader	Updated	Delete
Heartless	Converge			2:31	You Fail Me Redux	2004	Custom Tuning	mute	1970-01-01
Heartless	Feeling Every Sunset			2:44	Die Trying	2011	E Standard	mute	1970-01-01
Heartless	Heart			5:06	Magazine	1978	E Standard	mute	1970-01-01
Heartless	Kanye West			3:36	808	2008	E Standard	mute	1970-01-01
Heartless	The Fray			4:18	The Fray (Deluxe)	2009	E Standard	mute	1970-01-01
Heartless Scat / 無情のスキャット	NINGEN ISU			8:29	Ningen Isu Meisakusen Sanjussyunen Kinen Best Ban (人間椅子名作選 三十周年記念ベスト盤)	2019	C# Standard	mute	1970-01-01
Home Is for the Heartless	Parkway Drive			4:12	Deep Blue	2010	Custom Tuning	mute	1970-01-01
Rider (The Heartless Mare)	Ian McNabb			4:54	Krugerrands	2015	E Standard	mute	1970-01-01
The Heartless	Pvris			3:36	Paris EP	2013	Eb Drop Db	mute	1970-01-01
Thrill, Risk, Heartless	LiSA			4:21	Sword Art Online Fatal Bullet OP	2018	D Drop C	mute	1970-01-01