nofurthernotice

I have had work created for me on Fiverr and I know that I own the copyright based on FIVERR's platform rules. However, should I still spend the money with Legal Zoom or another entity to register the copyright? I'm not so worried about the artist coming back as much as I am about someone trying to create or sell products with my design. I know I have the legal copyright; but I'd like to avoid any headaches of having to take someone to court to enforce my rights.

I have a question similar to this thread. If I have purchased a design from an artist, do I automatically have the copyright? If so, where is my proof of that copyright? Is it still a good idea to go ahead and register the copyright? (You may see these questions as a new thread as well just because I really need this answer quickly).