Your posting history is found in your profile. While signed into HotCopper with your member account, look to the upper right corner of the page and click on the “My account” icon. Select "My Profile" from the drop-down menu.
On that page, there are tabs that will help you locate your posts.
All of your posts, including the removed ones, are available at the "Find all Content" link at the bottom of the "Recent Posts" tab.
Previously moderated content posted by you will show in the resulting search results as greyed out: