You can track the Vine reviews for your enrolled products:
In Seller Central, select Advertising, then click
Search for an SKU or ASIN in the Vine dashboard.
In the Vine Reviews column of the dashboard, you can see the
number of Vine reviews submitted by Vine Voices. If you click this number, you will be
redirected to the product reviews page where you will be able to identify Vine reviews by the
tag “Amazon Vine Review of a Free Product”.