You cannot verify anything using a tool that cannot validate truth.

You can't account for inflation because the price increase is inflation.

you can look at a basket of goods that doesn't have your specific product and compare directly

but inflation is the general price level increase, this can be used as a deflator to get the price of whatever product in past/future money amount to see how the price of the product changed in "real" terms (ie. relative to the general price level change)

this is not true