On a side bar, some states may keep a list. I know CA does for some weapons. I gave the CA Dept. of Justice; Bureau of Firearms, my name and requested a list of what they showed me owning. It had not been kept up to date as it showed several handguns I had since traded or sold well over twenty years ago. I was able to update fairly easy. Anyway, it may be worth your time to check your state records, too.
live and let live