Yes, that's what I was thinking of. (I have read the OGL twice, but I am still a bit fuzzy.) So basically, if anyone uses the content I create, they have to put a notice that says something to the effect of: "Prudent Ward is OGC, contributed by TellerianHawkeGaming LLC, and is used with permission under the OGL."
My mistake - it was Section 15.
Anyway, since I have it handy, here's the section 15 for "The Divinity Drive":
15. COPYRIGHT NOTICE
Open Game License v 1.0a © 2000, Wizards of the Coast, Inc.
System Reference Document © 2000, Wizards of the Coast, Inc.; Authors: Jonathan Tweet, Monte
Cook, and Skip Williams, based on material by E. Gary Gygax and Dave Arneson.
It Came from the Stars Campaign Guide, © 2013 Zombie Sky Press; Authors: John Bennett, Clinton
J. Boomer, Chuck DiTusa, Scott Gable, Michael Kortes, Colin McComb, Richard Pett, John Pingo, David
Schwartz, and Mike Welham.
Angel, Monadic Deva from the Tome of Horrors Complete © 2011, Necromancer Games, Inc.,
published and distributed by Frog God Games; Author: Scott Greene, based on original material by
Gary Gygax.
Angel, Movanic Deva from the Tome of Horrors Complete © 2011, Necromancer Games, Inc.,
published and distributed by Frog God Games; Author: Scott Greene, based on original material by
Gary Gygax.
Aurumvorax from the Tome of Horrors Complete © 2011, Necromancer Games, Inc., published and
distributed by Frog God Games; Author: Scott Greene, based on original material by Gary Gygax.
Froghemoth from the Tome of Horrors Complete © 2011, Necromancer Games, Inc.; Author: Scott
Greene, based on original material by Gary Gygax.
Vegepygmy from the Tome of Horrors Complete © 2011, Necromancer Games, Inc., published and
distributed by Frog God Games; Author: Scott Greene, based on original material by Gary Gygax.
Pathfinder Adventure Path #90: The Divinity Drive © 2014, Paizo Inc.; Authors: Crystal Frasier, with
Adam Daigle, Thurston Hillman, James Jacobs, Will McCardell, Amber E. Scott, and Greg A. Vaughan.
You'll notice that it gives document titles and copyright details, but it doesn't list every specific item - it doesn't say what was used from the "It Came from the Stars Campaign Guide" for instance.