Make a 3D object stay there for everyone and not move


Greetings. I would like users to scan a Zapcode at the door. Then as they wander through the building, they encounter 3D objects at fixed points. I realize I could add a Zapcode at each installation point. But a single scan at the door seems more elegant. Is this possible with world tracking and anchors? The only tracking tutorials seem to be for users to place 3D objects. Thank you.