It doesn't hurt to send your information to the registrar now even if the next Cobra registry is years from publication. The registrar will start recording the history of your car, the original options, the ownership chain, etc.
That way several years from now, if someone who gets a reproduction Kirkham serial number plate and tries to put it on something like this with your serial number...
You will have established that history of your car and there will be no question of who owns the "real" Kirkham with your serial number.
