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
Unclouded Day	Jesus Christ			1:05	Bluegrass	2018	E Standard	mute	1970-01-01
Uncomfortably Numb	Graveyard			6:14	Hisingen Blues	2011	D Standard	mute	1970-01-01
Uncomfortably Numb ft. Hayley Williams	American Football			4:15	American Football	2019	Custom Tuning	mute	1970-01-01
Under A Godless Sky	Rose Funeral			3:00	Crucify. Kill. Rot.	2007	C# Drop B	mute	1970-01-01
Under An Ashen Sky	Call Us Forgotten			4:15	A Hope Remains	2011	D Drop C	mute	1970-01-01
Under Grey Skies	Kamelot			4:55	Haven	2015	D Standard	mute	1970-01-01
Under Jolly Roger	Running Wild			4:46	Under Jolly Roger	1987	E Standard	mute	1970-01-01
Under My Skin	Aerosmith			3:48	Just Push Play	2001	Drop D	mute	1970-01-01
Under My Skin	The Sounds			4:12	Unreleased Track	2002	E Standard	mute	1970-01-01
Under My Thumb	Streetheart			6:41	Under Heaven Over Hell	1979	E Standard	mute	1970-01-01
Under My Thumb	The Rolling Stones			3:45	Hot Rocks	1971	E Standard	mute	1970-01-01
Under My Thumb	The Rolling Stones			4:43	Still Life	1982	E Standard	mute	1970-01-01
Under My Umbrella	Incubus			3:42	Morning View	2001	E Standard	mute	1970-01-01
Under My Wheels	Alice Cooper			2:48	Killer	1971	E Standard	mute	1970-01-01
Under The Graveyard	Ozzy Osbourne			5:03	Ordinary Man	2020	C# Standard	mute	1970-01-01