How would that work?

That was kind of the question. Presumably, naively, one could pull random numbers from random sources in a network, or maybe even this/these operations could produce randomness, whereby the production of randomness (numbers and/or sources) could be verified, and used to satisfy some conditions. Crude example for a roll of dice: Put in some redeeming script (if that in itself is a thing) if this random hash that I got from a random source, all of which I imagine is verifiable, ends in ... then the next roll of the dice is ..., and if that dice roll is ..., then pay ..., else pay ...