The 2-character codes and mapping to French and English names are free for internal and non-commercial use, but the numeric codes (database IDs as they call them) are only available to those who have purchased them.
You probably need to modify your copyright message to reflect that.
The ISO3166 data is copyright by ISO; you can purchase it here: http://www.iso.org/iso/publications_and_e-products/databases.htm#PUB100050.
The 2-character codes and mapping to French and English names are free for internal and non-commercial use, but the numeric codes (database IDs as they call them) are only available to those who have purchased them.
You probably need to modify your copyright message to reflect that.