could always join the server after uploading and see if the maps download...but thats a bit impractical with all the maps at the top of the thread...
I know winrar has the ability to check the integrity of the files, not sure about 7zip though...
Or...for the next time we do this you could have various donaters volunteer to upload the bsp and the redirect for 1 or 2 maps through the game server map upload, and have them ensure those 1 or 2 maps are working, could help to maintain a smoother gameday...