I have a solution for Harry.
Check the time, send any good occlumens with a time turner back for 6 hours, have them tell another good occlumens with a time turner to go back 6 hours, the time that it was when the first person went back in time, and have them ask yet another good occlumens…
Do that however many times you need to
Have someone actually film whatever happened, then wait until it is right after the time that the first person went back in time, show everyone the film.
That way:
a) An occlumens will not accidentally give away their secrets
b) Time will not be changed, since they waited
c) You know it’s real, since it’s on film.
I’m re-reading this chapter for the sixth time
And I just realized
Is the “Black robes falling” italics part a non-Harry point of view of the end of chapter 114?
The word being Harry’s spell on Voldemort, and “Black robes, falling” is actually part of the text in that chapter, also in italics, and in parentheses.