I'm not certain the National Atlas is proof. On the other hand:
From Public Law 85-508, July 7, 1958 | [H. R. 7999] 72 Stat. 339, AN ACT To provide for the admission of the State of Alaska into the Union:
SEC. 5.
The State of Alaska and its political subdivisions, respectively, shall have and retain title to all property, real and personal, title to which is in the Territory of Alaska or any of the subdivisions. Except as provided in section 6 hereof, the United States shall retain title to all property, real and personal, to which it has title, including public lands.
Something like that is more like what I had in mind. Note that it says the United States shall retain title, not the Federal Government. The Federal Government should be an agent for the States, not the owner.
I guess in terms of a legal document, I don't understand the difference. What United States entity would hold title if not the Federal Government? Each individual state have 1/50th with control over that?