I see that for CDs which I made myself from a vinyl LP I have a FreeDB ID with version 0. So obviously unregistered CDs do get this number when I scan them. Those numbers which I sent all had several versions of FreeDB ID. Is this a clue that they're registerd?

I wonder if regular CDs bought in a respectable store are supposed to be registered, as of course I'm not going to list IDs of at least a 100 scans with missing or wrong covers. I have the impression that the missing covers are more common with older disks.

I also have a lot of "new albums" that show only the track times but no track texts but I don't ask about these. I also filled in the missing information, so they're mixed up with the regulars.