I know it's in the core rulebook, but this sort of thing is worth being sure about.
Is the Pathfinder Chronicler prestige class OGC? I'm not sure how that meshes with the word "Pathfinder" as (I presume) a trademark. Are Pathfinders as an archetype OGC, but the specific Golarion-based organization (the various houses, the Decemvirate, etc.) PI? It's a bit confusing.
Thanks in advance, and apologies if the question is unusually obvious. Paizo are good folk, and I really don't want to tread on any of their IP.