late edit: DISCLAIMER: The pictured map is not actually a representation of the territories before colonisation. It's a hypothetical map of what countries there might have been had the continent not been colonised, thus all the names and borders are fictional and have never existed.
For good actual maps, check out native-land.ca.
Yes, though it didn’t “prove” ancestry to the high standards required for tribal membership, which requires linking one’s ancestry back through specific names using official genealogical records. She is estimated to be 1/32 Cherokee ancestry, exactly in line with her family stories, and the same as the current chief of one of the Cherokee nations. But, to be clear, we should also be respectful of the Cherokee nation’s political sovereignty in determining membership.