useful site to find out if a song has been released

[fishmongr]

Stumbled on this site today and found it very useful to see if a particular song has been published by one of the main karaoke producers:
http://www.kjpro.com/browse/

They have a record of close to 400k songs which I'm assuming covers the spectrum. You have to type in artist names last name, first name
to get the best results as it uses exact matching.

[DeusExMachina]

FYI, you can also use kJPro database directly inside kJams to name tracks in your library, whole disks at a time. Just make a playlist of the tracks in the right order, and select Advanced>Get Tracks From kJPro

Also, FYI, they are NOT very up to date. Many tracks that are out there are NOT in their DB.