Nxt could have said let's pick a 3rd party both trust to hold the bounty and received the info ,
if it turned out to be true, cynicSOB is paid by 3rd party and 3rd party relays the info to NXT,
if it turned out false 3rd party returns the bounty to NXT and deletes the info cynicSOB sent them without giving it to NXT.

The 3rd party would make the decision if it was true or not, just pick someone both sides agree too.