Q:

Non inverting integrator with reference

This circuit should work as part of DC servo circuit in audio amplifier with single power supply, maintaining power amplifier stage working point at Vcc/2 (output is AC coupled).
Intuitive approach is to get generic non inverting integrator and replace all ground connections with stable low impedance reference voltage source of Vcc/2.

But the network at op amp non-inverting input is just an RC circuit, so it can sit on any low impedance source, regardless of its level. So I returned it back to the ground. This gave me a freedom to replace voltage reference with simple divider. Am I right?

A:

I think what you are asking is if the two circuits in your diagram are equivalent.  
If so, the answer is yes.  The Thevanin equivalent of the bottom network attached to the non-inverting input of the amplifier is exactly the top network.  So they are identical in operation, at least ideally.

