Follow the instructions below to find the link to your Amazon Profile Page:
1) Go to Amazon US / Amazon UK/ Amazon DE / Amazon FR / Amazon ES / Amazon IT / Amazon Japan / Amazon CA (I have linked to it so you can open the profile page in a new tab).
2) From the drop down menu of Your Account, click on Your Account.
3) On Your Account page you will see "Your Amazon profile" link. Click to go to your Amazon Profile page.
4) Now, your Amazon profile link is at the top in the URL