Now that you explained it, sorry it is still a stupid idea.

So let me get this straight. A record store would pay money for your system, and then would have to pay employees to play CD's to be stored in your system as mp3's. Do you have some special CD drive invented and built that will play the CD at 100 times normal speed? Or do the stores have to play all the CD's in real time speed? Either way, that is thousands of man hours per store. And for what?

Then they have all those CD's opened, now without bar codes, etc. So, what do they do with those? Put them in a bargain bin all at the same price?

Then where are people going to listen to all this mp3 crap? And this helps the record store how?

You don't have to worry about copyright infringement directly, you are shifting it to the record store. No record store is going to take the chance on the infringement, no matter how many opinions you have from lawyers (which will cost thousands for the research), or piss off their record company suppliers.

Any legal opinion you get will be for you, based upon what you are doing. No attorney is going to give you a legal opinion applicable to a third party record store, nor would any record store accept it if they have any clue whatsoever.

I sure hope you have not spent any real money on this nonsense.