Uranium One was done so that uranium from US mines goes everywhere. If that uranium is used in a nuke, then that nuke could be blamed on any country that has US uranium.  The uranium from U1 is used in US reactors.  It does not go everywhere.    Also I seriously doubt your claim about tracing uranium back to particular mine is true.  Even if it were,  that would only be the raw uranium ore, the rocks that come out of the earth that look like this https://cna.ca/wp-content/uploads/2014/06/Uranium-ore-2.jpg By the time it becomes reactor fuel it's been processed. Here's what it looks like when it's been milled for processing.    https://upload.wikimedia.org/wikipedia/commons/2/2f/LEUPowder.jpg By the time it becomes nuclear bomb fuel it's been highly processed to be not just almost pure uranium, but almost purely a certain isotope of uranium. You're theory doesn't stand up.