I don't think anyone is ever 100% sure on the "world's first" status. If you think you have one, you do a google search and check World of Ball Pythons...and if you can't find your combo anywhere, then you can try to call it a "world's first". Even then, it still happens that someone else will come along and say, "Oh no you don't! I did it first!"
There isn't any particular group of people or individual person that has some sort of final say in such matters.
Personally, with very few exceptions, I think the whole "world's first" claim on ball python combos is pretty lame anyhow. But it seems important to some folks....so....whatever floats your boat.
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