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
2019 Guy (S.O.F.'s version)	The Gentle Men			3:22	2019 Guy (Single)	2019	Eb Drop Db	mute	1970-01-01
21 All Forms Blue	You			1:45	Youbluesikwtif	2015	E Standard	mute	1970-01-01
21 Letters	Delta Sleep			5:23	Twin Galaxies	2015	E Standard	mute	1970-01-01
2112 Overture / The Temples of Syrinx	Rush			6:48	The Spirit of Radio: Greatest Hits 19741987	1976	E Standard	mute	1970-01-01
21st Century	Red Hot Chili Peppers			4:22	Stadium Arcadium	2006	E Standard	mute	1970-01-01
21st Century	Red Hot Chili Peppers			4:25	Stadium Arcadium	2006	E Standard	mute	1970-01-01
21st Century Bitch	Holy Wars			2:54	Eat It Up Spit It Out	2022	B Drop A	mute	1970-01-01
21st Century Breakdown	Green Day			4:43	21st Century Breakdown	2009	Eb Standard	mute	1970-01-01
21st Century Crooners	Ghinzu			3:32	Blow	2004	E Standard	mute	1970-01-01
21st Century Digital Boy	Bad Religion			2:52	Against The Grain	1990	E Standard	mute	1970-01-01
21st Century Gentleman	Royal Republic			3:14	We Are The Royal	2010	E Standard	mute	1970-01-01
21st Century Schizoid Man/Mirrors	King Crimson			7:21	In the Court of the Crimson King	1969	E Standard	mute	1970-01-01
21stCenturySchizoidMan	King Crimson			7:03	In The Court Of The Crimson King	1969	E Standard	mute	1970-01-01
24 Frames	Jason Isbell			3:18	Something More Than Free	2015	E Standard	mute	1970-01-01
24 Hour Bullshit	Nailbomb			3:54	Point Blank	1994	D Standard	mute	1970-01-01