D.C. Code § 14-503: Record of will as prima facie evidence of contents and execution.

A record of a will or codicil recorded in the office of the Register of Wills of the District of Columbia, that has been admitted to probate by a court in the District of Columbia, or a record of the transcript of the record and probate of a will or codicil elsewhere, or of a certified copy thereof filed in the office of the Register of Wills, is prima facie evidence of the contents and due execution of the will or codicil.