The Colorado adoption law clearly states that the decendant of an adoptee can gain access the OBC and records if the birth parents and adoptee are deceased. Please go to www.aisctc.org
under faq section. You will still need to file a motion(JDF 532 and JDF 533 down load from state court web site or linked from web site) with the county court that the adoption was finalized. See under "faq" section. All information there.
J.N.H. aka B.B.M.