Adding further information to the copyright?

Hello,

I like to add further information to the copyright section, which is dynamically read from an external php file. How can I append the result from this substr call to the GP copyright?
<a href="http://tngsitebuilding.com/"><?php include '/httpdocs/subdomains/tng/version.php'; $tng_majorversion=substr($tng_version, 0, 4); echo "$tng_title $tng_majorversion"; ?></a>

My desired results would be 2 copyright lines.
1) WordPress copyright
2) TNG copyright (<--this is an external genealogy software which I am running in a sub domain)

Thanks for your hints.

Regards,
Marcus