Are you kidding? There's tons of verifiable proof that the overwhelming majority of their PRs are false. The proof is that NONE OF THEM EVER HAPPEN!
Asking for proof to a non-event is ridiculous, the proof is that whatever they said was going to happen, didn't.
Me: "yeah honey, I'm going to mow the lawn this weekend"
Wife: "why didn't you mow the lawn, like you said you would?"
Me: "Prove I didn't mow the lawn"
Wife: "Proof? The proof is that the grass is still 2 feet high!"
Do you care to point out a single PR that ever actually happened?
-unconvinced