As significant part of the boot process '/etc/init.d/tc-config' gets executed and the two lines pertinent to your question appear to be:
tc@box:~$ grep -n VERSION /etc/init.d/tc-config
12:VERSION="$(cat /usr/share/doc/tc/release.txt)"
26:echo "${GREEN}Booting ${YELLOW}Core $VERSION ${NORMAL}"
So take your pick what you want to change, but I for one would consider it very bad practise if you would use this information to misrepresent the origin (or even copyrights) of your remaster.