1. A method for remotely directing a fishing tournament, the method comprising: receiving, by a server, a digital image file over a data network, the digital image file containing an image having: a fish caught by a tournament participant, and a reference object for determining the size of the fish, using the reference object in the image to determine the size of the fish, and identifying, within metadata of the digital image file, a prohibited type of editing for the purposes of invalidating the digital image file, wherein the metadata of the digital image file is not visible within the image.