I think it should have been easily provable that you owned the website and that your code matched, any sort of escalation beyond initial talking with professor should have resolved that. If not that is absolutely ridiculous.
This was 2002. They didn't understand that people could have their own websites - they kept on going "but we did not set this up for you, there is no other way to have a website". Not in terms of regulations, but ignorance and an unwillingness to listen to a mere peasant, uh, undergraduate.