I don't think there is any way to know or find out...The greys are the wild, wild west of the OTC. Look at how much manipulation takes place on the upper tiers of the OTC as it is and here you are in the greys with no accountability or documentation.....
I could pull it with time and sales but I watched it all day and I would the majority of trades went off between 7-10 cents. About a quarter of the volume today was one big order at .10