The group III oil used in COP oil are sourced from SK lubricants from Korea. I looked it up and it is a state of the art newer facility that produces the Yubase. The liquid titanium comes from their development with an additive supplier, i dont remember right off the top of my head but maybe oronite? Not sure what Group III oils and tires have in common.
There was an article here talking about how there is very little if none, Group III produced in the US.
For comparison, Shells new GTL base stocks are from Qatar. Base oils from overseas is not uncommon.