Sorry to bump up this old thread but I have been following convos on Twitter between Epic and people who have deleted their saves. They confirm that all the data for the unlocks is in the save and nothing is cross checked with the server.
If people have a good save with everything please do upload it as many of us might find it useful when the game is out.
I have been following twitter convos from Epic staff and it seems that only a save is needed for all the unlocks and the beta medal. There is also a thread on their site about this and they confirm that there is no record on the profile itself (GPD) or Server.
The save will obviously not work in the beta if someone else uses it but there might be a scanning mechanism in game that checks the save for unlocks. Thanks to the OP for being kind enough to re-upload his save.