Can you provide some proof that you're really a chick and not some fat ugly dude?
Like, I don't know maybe Hand-write bitcointalk on a piece of paper with today's date and your username?
Please be careful, that's way too easy. eWhores have all these ready and can add any kind of text on paper, body parts etc. on existing photos.
If I was to ask for such a service, I'd ask for some
very unreasonable places/positions/items to take a picture with. Likely, the (possible) ewhorer won't have a picture (of the girl whose pictures he is selling) where she holds a mug and light bulb in her left hand, up side down, while sitting on the floor. Or something, I think you get the point.
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Not judging the tread.