I’ve designed a couple series of images relating to symbols of the fifty U.S. states. First, I have a series of about forty new state flag proposals. Second, I have a series of tartans representing each of the states.
My understanding is that works of arts - both text and graphic - are automatically protected under copyright law. Yet book publishers file for some sort of official or enhanced copyright status. I believe it gives them a little extra legal clout if someone tries to steal their stuff.
Can/should I similarly file for an official copyright regarding a series of images?