Recording to test right and left channels...

Is there a reference recording out there that can be used to tell if I have my right and left channels correct?  

Thank you.
what are you unsure of?
Is this cartridge pin wire uncertainty?
Interconnects between turntable and preamp?
CD and preamp?
If its beyond the cartridge just pull one RCA and see what sound remains (with the speaker disconnected and/or amp off of course)
Cartridge pins are a bit more complicated to diagnose.  Just make sure you follow either the color codes or the labels.  Standards can be found on the web with some simple searches.

I always use Take Five by Dave Brubeck you should hear the opening bit with cymbals coming out of the left channel.

Always easy to identify.