A known local hash identifies the downloaded artifact. Remote presence verification does not prove a remote cryptographic hash. Local filesystem copies are checked against their stored hash and size.
Dune is a film about very sweaty people living on a giant sandbox who, instead of inventing cars, decided that riding a building-sized worm was a perfectly reasonable solution. Nobody here has been not high since before recorded history and they built an entire religion around that fact. The main character is Paul, a teenager who moves to the drug planet and within about three weeks decides he is probably a god. Nobody disagrees