Considering that it is only the Honour of the achievement that is at stake in these championships, we will rely on honour when submitting results.
All I need is your name or alias, the puzzle you completed and the time taken. This can easily be proved by screen dumping the result window (which appears when you have built the puzzle) and submitting that image along with your details. (How to Screen Dump)
The only condition when building the puzzle is that you do NOT use any of the help tools - that is, the Solid Image or the Ghost Image. This cannot be proved - we all rely on your good name.