I've been searching Google for the past hour looking for a website (that I thought I saw in Computer Arts or Digital Creative Arts) that allows you to upload your digital work for copyright protection purposes. Kinda like a depository for work that you have created for personal and professional projects. I know about CreativeCommons, but I don't think that was the site.

For some reason, the term; "I made it first" or "I created it first" comes to mind...

Any of you know or have any inkling as to what I'm talking about? Is there such a thing? Does mailing yourself work really protect intellectual property?