He's right about that one:
Military aircraft absolote altitude record(non level flight):
"Height (ft)....Date.............Plane type.............Pilot.........
123,523.58 Aug. 31, 1977 MIG-25E-266M , Alexander Fedotov(USSR) , Country: USSR"
http://www.factmonster.com/ipka/A0004556.html
However, that is one of many altitude records, and it is the only one held by the Mig25.
For instance:
Military aircraft absolute altitude level flight:
Height (ft).........Date ........Plane type ...........Pilot ......................Place
85,068.997 July 28, 1976 SR71 Capt. Robert C. Helt (USAF) Beale AFB, Calif.
Absolute altitude, carrier-airplane launched:
X-15, 314,750 feet, July 1967