Proof that Christopher Nolan did some work on Genghis Blues

Alex: I see that Christopher Nolan (I) of Oppenheimer fame was indeed a friend of Roko Belic, director of Genghis Blues, and in fact they had made the short film Tarantella together in 1989, so the Christopher Nolan who provided editorial assistance on Genghis Blues would indeed be the famous one (he wasn't famous yet; Memento was released the following year). If you didn't previously provide an explanation including links to articles showing that Belic and Nolan were friends and collaborators, I would recommend doing so. Otherwise, the IMDb staff might have assumed that the credit belonged to some other person named Christopher Nolan rather than the famous one.