You can’t Copyright a Domain name. As well as you can’t Copyright any Title alone! Period! Usually, for them, one opts for Trademarks, or the earlier existence of such itself, makes a stronger case!
And when it comes to the Websites, it is a well-known fact that one needs to dismantle every element of it, and then, that individual elements can be copyrighted. But, now my dilemma awakens from hibernation!
Look: