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
Operation Rescue	Bad Religion			2:11	Against the Grain	1990	E Standard	mute	1970-01-01
Ophidian Sunrise	Omnium Gatherum			6:23	Grey Heavens	2016	C# Standard	mute	1970-01-01
Oracle	Scale the Summit			5:34	The Migration	2013	BEADG	mute	1970-01-01
Orange Crush	R.E.M.			3:53	Green	1988	E Standard	mute	1970-01-01
Oscillation Point	Scar Symmetry			4:08	Pitch Black Progress	2006	E Standard	mute	1970-01-01
Our Fortress Is Burning II - Bloodbirds	Agalloch			6:24	Ashes Against the Grain	2006	D Standard	mute	1970-01-01
Our Fortress Is Burning...I	Agalloch			5:25	Ashes Against the Grain	2006	D Standard	mute	1970-01-01
Our Shangri-La	Mark Knopfler			5:44	Shangri-La	2004	E Standard	mute	1970-01-01
Our Sick Story (Thus Far)	Atreyu			3:37	A Death-Grip On Yesterday	2006	D Drop C	mute	1970-01-01
Out In The Cold	Tom Petty	Combo		3:45	Into the Great Wide Open	1991	E Standard	mute	1970-01-01
Out of the White Hole	Ayreon			7:13	Universal Migrator Part II: Flight of the Migrator	2000	Custom Tuning	mute	1970-01-01
Outside	Hollywood Undead			4:46	Notes From The Underground	2012	Drop D	mute	1970-01-01
Over Bjoergvin Graater Himmerik VII	Taake			4:34	Over Bjoergvin Graater Himmerik	2002	E Standard	mute	1970-01-01
Over It	Bullet For My Valentine			3:50	Gravity	2018	Custom Tuning	mute	1970-01-01
Over My Head	Kings X			4:53	Gretchen Goes to Nebraska	1989	E Standard	mute	1970-01-01