Only you know what you have available to prove who you are. Our users want to be sure that you are actually telling the truth, so whatever you have that will convince the readers is great. We prefer that the proof is posted publicly whenever possible so that the users can decide how credible it is.
There are two proof standards:
b) Private verification with the moderators requires unequivocal proof your claim is true. The Moderators of IAMA have informally partnered with TruePic to help verify submitted proof pictures and videos.