It is really very simple, she needed to comply with the record's requirements for evidence, there is no hate or anything else in this statement.
Suppose I claimed to have broken the 100 Metres world record with just a few mates watching on an unverified track, am I just supposed to be believed?
I have no comments at all on Amy other than there doesn't seem to be an online record of her running extraordinary distances or times in real competitive events. There is absolutely nothing wrong with this but generally someone setting a record such as this would have a lot of this kind of history of performances.