README.md in isrc-1.0.1 vs README.md in isrc-1.0.2

@@ -19,9 +19,16 @@
 	    self.isrc = isrc_match[:isrc]
 	    self.match_quality = isrc_match[:delta]
 	  end
 	end
 
+## How Does it Work?
+
+We are querying the PPL UK ISRC databases using their [public search tool](http://repsearch.ppluk.com/ARSWeb/appmanager/ARS/main).
+
+The web app is written in Java. It makes an ajax request to grab search results.
+
+The AJAX request will fail unless the request has specific session vars and cookie values based on the response data from the main app response.
 
 ## Contributing
 
 1. Fork it
 2. Create your feature branch (`git checkout -b my-new-feature`)
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