I'm quite the collector and I also enjoy a number of the songs within this game, so I've been going through and trying to buy and register a number of discs that I come across, and I see so many that are usually up in the player shops. Problem is, I've registered so many that my list is getting quite large, and as far as I'm aware, there's no way to actually "track" which ones are already registered to oneself without having to cross reference the jukebox. So I've been trying to make a personal list to compare which ones I have and have not.
Well considering how what lists I've come across so far seems to be out of date or missing information (I dunno how I've come across at least one NA song that doesn't appear to be in any of the JA lists I've found, maybe said list is outdated) I feel it's getting tougher to find out which ones I don't have so I don't accidentally waste meseta on buying something I already have registered.
I don't know if there's an easy way to do this, but what I'm thinking is maybe have it set up kinda like it is for the cosmetics that one can learn (where it says Unsued, Bound by another character), to show that it's registered to one's jukebox. That's the only thought that comes to mind, unless someone has a better idea.