Try embedding your name/copyright notice within the main focus of the image. Like if you're doing a poser girl, but copyright on her leg, or near by. Or some book cover artists I've seen make a symbol of their initials and place that in a rock or on a button of a coat, or a belt buckle. If not not misspelling his name.. the artist "Michael Whelan" do does a lot of covers for Del Rey does this.