  We compute the corrections to the primordial power spectrum that should arise
in realistic inflationary scenarios if there exists a generic covariant
ultraviolet (UV) cutoff, as commonly motivated by considerations of quantum
gravity. The corrections to the spectrum consist of small superimposed
oscillations whose frequency, phase, and amplitude are functions of the
comoving wave number. For any given cosmological parameters that characterize
the slow roll during inflation, the frequency predicted for these oscillations
depends only on the value of the UV cutoff. The specificity of this prediction
can be used to increase experimental sensitivity through the filtering for
template signatures. This will allow experiments to put new bounds on where a
natural UV cutoff can be located between the Planck scale and the Hubble scale
during inflation. It may even bring imprints of Planck-scale physics in the
cosmic microwave background and in structure formation within the range of
observations.
