Well said, LDMR. You're correct, I've checked and there's no erect photo of him anywhere. The only thing we know about him is that his penis is at least 6" long. Any time someone posts only 'flaccid' photos, you're almost guaranteed that they're just a shower, and probably fairly erect in that photo (just still pointing down.)
He has this amazing strategy of accumulating 'proof', without every actually being measured or producing pictures of his erection:
1 - Go around telling everyone that you have the world's biggest dick
2 - Tell enough people and request enough interviews, and eventually get one (Rolling Stone)
3 - Continue to tell everyone, and now cite the magazine interview as proof of your measurements
4 - leverage that 'proof' in to a spot in a credible documentary
5 - cite that documentary as proof, go around telling everyone stories about your 'world's-biggest penis'
6 - Report made-up news stories about your enormous dick, get stories written about you in mainstream media
7 - Cite your magazine article, documentaries, and news agencies all saying you have the world's biggest dick as proof that you have the world's biggest dick.
This is all the proof one could hope for. That is, of course, aside from a simple photograph or a measurement by a trusted 3rd party.
source: I'm the world's tallest man.