Oh, well, old stuff has already come into the public domain, of course. Current art work will be protected for a very long time since laws have been adopted to extend the protection.
I should have qualified my statement to refer to Canada and the US more specifically, as other countries have different views.
The registration of the copyright only serves as a tool to facilitate litigation.
The presence of a copyright notice is pretty much useless legally speaking.
İMyself, 2004 - does that mean anything? Nope.