Does time exist in consciousness, not in physical world?

There are many discussions about the nature of time. Time is a measure of change, and change requires two comparable states. There is no two states in this physical world, at any given moment only one state exists. So we are comparing only what is in our memory. Every picture of this material world is registered in our memory and by comparing those pictures we make conclusions about 'time' and 'change'. So, basically, time is the result of the interaction of a conscious observer (with memory) with a 3D material world without time. Do you agree?