I'd expect the name of whatever you're trying to be known as be in the header as your branding.

I guess it makes sense to have the domain be bitcoinillustration but then it is a bit strange that once you're on the site you use your name for branding. I suppose it doesn't really matter in the end, more of a consistency thing.

I think you could leave the domain, and then maybe have the header be your name + bitcoinillustration, or you could leave your name, but I think you should have a little into paragraph or blurb that says who you are, if you want to be associated with your name.