*514 Robert Wiley Deason appeals his conviction for driving with an expired license. We affirm.

The record shows that Deason was charged by accusation with driving with an expired license, and his case proceeded to a bench trial in the State Court of Bibb County. The trial court found him guilty, ordering him to pay a $750 fine. Deason subsequently filed a pro se notice of appeal to the "Georgia Superior Court." 1 Concluding that Deason could not appeal his state court misdemeanor conviction *515 to the superior court, the trial court determined that he "desire[d] to appeal his conviction to the next level of court." It thus directed the state court clerk to transmit the appeal to this Court. 2

Generally, "[n]o person ... shall drive any motor vehicle upon a highway in this state unless such person has a valid driver's license[.]" OCGA § 40-5-20 (a). Deason *833 concedes on appeal that he had a driver's license at one point, but not at the time of the charged offense. He does not deny that he was driving when cited for the traffic violation. And although he claims that the trial court erred in finding him guilty of driving with an expired license, he failed to include a transcript of the bench trial in the appellate record. See Hines v. State , 320 Ga. App. 854 , 863 (4), 740 S.E.2d 786 (2013) ("When an appellant seeks to prove error in the trial proceedings, the burden is on him to produce a transcript of the allegedly erroneous matter.") (citations and punctuation omitted); OCGA § 5-6-41 (g) (discussing procedure for obtaining substitute transcript "[w]here a trial is not reported").

"Without a transcript to review, this court must assume as a matter of law that the evidence presented at trial supported the [trial] court's findings." Johnson v. State , 261 Ga. 678 , 679 (2), 409 S.E.2d 500 (1991) (citation omitted). Nothing in the scant, eight-page appellate record demonstrates any error below. See Westmoreland v. State , 287 Ga. 688 , 696 (10), 699 S.E.2d 13 (2010) ("It is a sound rule of appellate practice that the burden is always on the appellant in asserting error to show it affirmatively by the record.") (citations and punctuation omitted). To the extent Deason claims that he is a "sovereign citizen" not subject to the jurisdiction of the courts or governmental agencies, that argument fails. As we recently noted, the "sovereign citizen" defense, which alleges that the government is illegitimate, "has no conceivable validity in American law." Brown v. State , 346 Ga. App. 245 , 247 (4), 816 S.E.2d 111 (2018).

Judgment affirmed.

Dillard, C. J., and Doyle, P. J., concur.