Is there enough tangible evidence to suggest multiple timelines before the split in OOT?
Yes, the killing of Demise in the past and the presence of Demise in the present suggests a split timeline.Is there enough tangible evidence to suggest multiple timelines before the split in OOT?
Yes, the killing of Demise in the past and the presence of Demise in the present suggests a split timeline.
Unless your a priori assumption is that the timeline is linear, and then there are two logic leaps (Impa hid the Master Sword and the Imprisoned was residual malice which is suggested by the new Sealing Spike).
There's also the Oracle of Ages-like Tree of Life situation.
There is also the Minish Cap alternative ending and the Four Sword in Ganon's Pyramid in A Link to the Past.