The plugin is letting visitors to copy/paste the content

Sudeep, the iCopyright plugin does not try to prevent visitors from cutting and pasting the content. That’s not one of its features. Its goal is to make it easy for people to legally license the content.

If you have enabled the “EZ Excerpt” feature in the settings page, when a visitor selects a large enough block of text, he or she is given the opportunity to buy a license for the excerpt.

Hope this helps clarify.