At room temperature, the input bias current (not offset current, which is the difference between the offset bias currents of each input) on the TL072 should be too small to measure using the current setting of an ordinary multimeter.
One thing you could try is measure the voltage across the input resistor, at room temperature and after gently heating the TL072. It's a J-FET op-amp, so the bias current should have a positive temperature coefficient. If the current falls, after heating, then it's really a BJT input op-amp, not the TL072. BJT input op-amps have a negative temperature coefficient for bias current, because the hFE increases with temperature, so the base current falls.