Well we've got the server logs showing your AWS instance accessing that image on our server. As copyright is tort the usual burden of proof is balance of probabilities [UK, "preponderance of evidence" in USA I think; please correct if this is wrong in your jurisdiction], I'd say that's enough to swing it that you're going to need to prove you didn't use that image ... oh and we have a HN post replying to you suggesting you do this, which swings the balance a touch further.

We can probably have an expert witness testify the scene could use that image (ie they don't visually disagree so much that the scene couldn't have derived from inter alia that image).

Not enough perhaps to prove a criminal case ...