Seems like there ought to be countless ancient proto writing systems not just in our species either. I guess most species aren't in situations where storing information like this offers much of a selective advantage. Maybe you can count an animal scent marking out its territory as a sort of proto writing system; it is only somewhat different than the plat map in your city hall.
EDIT: Apparently neanderthals are thought to have used tally marks... (https://www.scientificamerican.com/article/how-did-neanderth...)