Sorry, but for me it sounds a little bit too complicated.
Let me explain the situation.
I am a collector of Deep Purple live bootlegs. You can't buy it anywhere, it is an audience recording of live shows. You can find it anywhere: torrents, forums etc.
Now I have more than 200 shows. What's a problem? I can't remember which show I have. Having a document, created by MB itself is the best solution, but boroda's solution is a little bit complicated for me.
Also, I assume that for somebody having a list of all library can be useful as well.