Would this box kept its contents safe through what happened in Paradise CA if it had been located in one of the homes that burned to the ground ?

This fireproof box is UL Classified to endure 1/2 hour at 1550°F, meaning it will keep the internal temperatures lower than the burning temperature for at least 30 minutes. Specifically to your case, it would depend on how quickly the fire department was able to reach the house and extinguish the fire.