I think a registry is just list with someone willing to maintain it. In this day and age, it would probably be a website maybe with additional info pertaining to the cars on the registry. I expect it would have to be on a different server than FABO's unless maybe a fee were paid to carry it or something.
I guess in some ways, you could say the list I have been compiling is a registry. Loose and hard to find, but kind of one.
I think the other thing about a registry is, there seems to be some kind of check to make sure the car is legitimate. Not sure what though. And probably some sort of agreement with the owner that certain info would stay secure, or not required.
Just tossing ideas out.
I know there is (or used to be) a registry for some other car referenced on
FABO, but I can't remember what it was.