So you've created your opensolr collection (index).
Now, you're trying to access it using the solr URL that is provided to you in the solr index information page, and you most likely get an error such as this:

So, this is generraly a good news, since it means that nobody may access your index data.
In order to be able to access your index data, you should go to your opensolr account under the My OpenSolr tab and select Collections Manager and simply click the Tools icon on the left side of ech of your collections

Once you reach the Collection Admin Page, which sould look something like this:

You should click on the Access IPs tab, and enter your desired IP address that may gain access to your collection.

NOTE: PLEASE ALLOW UP TO 2 - 3 MINUTES FOR THIS CHANGE TO TAKE EFFECT !

Now, go back to Core Server Info tab and click on the link that reads: Solr Search, and you should see that solr now returns the correct results directly from your index

Enjoy !