Next-to-leading-power kinematic corrections to DVCS: a scalar target

Using the recent results on contributions of descendants leading twist operators to operator product expansion two electromagnetic currents we derive explicit expressions for kinematic finite-$t$ and target mass corrections DVCS helicity amplitudes $1/Q^4$ power accuracy. The cancellation IR divergences is demonstrated all powers in order perturbation theory. We also argue that coherent from nuclei are small do not invalidate factorization theorem.