No it is not. The real world is the proof of the mathematical description, not the other way around. The real world is the proof; not the math. Math must correspond to the real, detectable, perceptible, measurable, etc. world or else is a theoretical fiction.
Some time ago, humans discovered that the quantifiable part of the real world is understandable and successfully modeled by mathematics. That if you take 2+2+2+2 apples you'll have 8 apples and if you cut them in half, you'll have 16 pieces. Every time.
Math works every time in the quantifiable real world. You can prove something by math and you have proved it "in the real world." If you won't take math as proof, you can't take logic as proof, and you have to cut every apple in half to "prove" 1+1=2. Until you find another apple.
Math proof has been considered "real" proof for a long long time.