The title was given to him by "World Federation of Fighting Arts", see the article:
http://countdante.com/archives/Article6.gif
He got the title in '67 and then retired so he didn't have to defend it:
http://countdante.com/archives/Article2.gif
Count Dante was actually a good fighter, he won many tournaments and coached even more winners. His genious idea was: cross-training. Actually, he did MMA back when no-one had heard about it. His philosophy was to take the opponent to deep water and drown him. That means, take him to a fighting range he is unfamiliar with and beat him there. That was unheard of at the time, when everyone picked one style and sticked loyally to it, no matter what. As far as fighting skills, Count Dante seems to have been the real deal back then. Nowadays most of his stuff seems pretty basic compared to modern MMA but hey, he did have limited resources back in that era.
It is sad that Ashida Kim has tried to make a name for himself by associating himself with Dante's organization as it has mostly hurt Dante's students (Aguiar et.al.) in the real org founded by Dante. Even the fact that this is discussed in the "ninjutsu" forum here proves this point. Dante never claimed any link to any ninjutsu system, yet where do people post guestions about him? In the ninjutsu forum... All because of Ashida Kim.
A bit about the name "Count Dante"... The guy was a "Count" of some kind. Dante was a "stage name" but as I have understood, a name that did exist somewhere in his family history, somewhere in the European family roots of his. The point in choosing that name was, that he thought it was cool to be Dan-Te (dan as in "black belt expert", te as in "hand") so he called his MMA style the art of Dan-Te or the art of "Expert Hands" or "Black Belt Hands". So the whole Count Dante thing was a larger story that has been mostly forgotten and the remains ridiculed later.
Overall a sad story about a gifted martial artist who fell because of other problems in his life.