I have little doubt it is what it was claimed to be. There are other examples known of this frame style from the Caloi era, such as the Wiebren Veenstra one botty kayer linked earlier in this thread. This one pictured here is an ex Kevin Livingston example that is in one of the Merckx FB groups. If I recall correctly, the frameset was for sale on Yahoo auctions a while back now, and the current owner has built it as you see.

There is footage on Youtube of the 1995 TDF TTT that shows some of the Motorola riders on this exact style of frame.