Maybe Prophecy was the first official single, but I remember Nostradamus being the first song released period, even if it was only online. Kind of like how for the last AIC album, A Looking In View was the first song people heard but the first official single was Check my Brain.
05/06 - Misery Index
07/19 - Rise Against/Killswitch Engage
08/08 - Slipknot/Lamb of God