Fyi not everything from this museum was attributed to the OCC, some is attributed to other earlier paleo indian groups, some to contemporary archaic indian groups, and some to later woodland period groups. This info is usually noted by the exhibit label

"COPPER CULTURE
INDIAN CEMETERY
5556 B.C."

ETHNO-LINGUISTIC MAP OF THE TERRITORY OF MODERN TURKEY AROUND THE YEAR ZERO
https://redd.it/1mhoh6i
@r_mapporn