There is evidence indirectly to substantiate this: Gisevius at Nuremberg implicated Goebbels in planning the fire, Rudolph Diels stated that Göring knew how the fire was to be started, and General Franz Halder stated that he had heard Göring claim responsibility for the fire.
This is supported by indirect evidence: Gisevius's testimony at Nuremberg linked Goebbels to the plot, Diels stated that Göring had prior knowledge of the fire's initiation, and Halder reported that Göring acknowledged responsibility for the blaze.