Copies of such records and proceedings in the courts of a foreign country, may also be admitted in evidence upon due proof:

    (1) That the copy offered has been compared by the witness with the original, and is an exact copy of the whole of such original;

    (2) That such original was in the custody of the clerk of the court or other officer legally having charge of the same; and

    (3) That such copy is duly attested by a seal, which shall be proved to be the seal of the court in which such record or proceeding shall be.