I agree with
@jcandleattic - stearic spots. Your oils were hot enough when you started, but putting it in the freezer would have caused the outer layers to cool pretty quickly, while the center gelled. You can see that from the awesomely perfect partial-gel ring in the center of the soap, which has far fewer stearic spots. It looks cool so just pretend you did it on purpose.
If you want to prevent this in the future, soap at lower temps, and don't put the soap in the freezer. Instead, raise it up on racks or soup cans, and set a fan to blow on it. That will do a better job of preventing overheating, without causing the stearic acid to cool too quickly and create the white spots. Also, don't cover it except for maybe a light layer of plastic wrap or piece of cardboard over the top to keep it clean and ash-free.
It may take some experimentation to get the right combination of temps, insulation (or lack thereof ), and cooling techniques for this recipe, but fortunately, as stated in the previous post, stearic spots are just cosmetic. I get them a lot since I soap cool and use a lot of lard and tallow.