Minn. Stat. § 35.828: EVIDENCE.

Marks or brands which appear in the state brand book or its supplements or which are registered with the board, are prima facie evidence of ownership and take precedence over similar marks or brands if the question of ownership arises. The owner whose mark or brand does not appear in the state brand book or its supplement and which is not registered with the board must produce evidence to establish title to the property in the event of controversy.