If it's a game that records your times, expect that you might be called out for it. In that case a photo would suffice, but it has to be the exact same time as you submitted, not a close or even better one.
This to avoid people that submit stats of what they think they *might* get if they really tried. Only submit stats you actually got.
Once you're an established and trusted runner you probably don't have to pay as much attention to it though, just get into the community and you'll be fine