... no matter what Principal Chief Chad Smith says.

From the 1866 post-Civil War treaty between the U. S. and the Cherokee Nation (emphasis added):

ARTICLE 9.

The Cherokee Nation having, voluntarily, in February, eighteen hundred and sixty-three, by an act of the national council, forever abolished slavery, hereby covenant and agree that never hereafter shall either slavery or involuntary servitude exist in their nation otherwise than in the punishment of crime, whereof the party shall have been duly convicted, in accordance with laws applicable to all the members of said tribe alike. They further agree that all freedmen who have been liberated by voluntary act of their former owners or by law, as well as all free colored persons who were in the country at the commencement of the rebellion, and are now residents therein, or who may return within six months, and their descendants, shall have all the rights of native Cherokees: Provided, That owners of slaves so emancipated in the Cherokee Nation shall never receive any compensation or pay for the slaves so emancipated.

I doubt I would agree with U. S. Rep. Diane Watson on much, but she's right about this.