That would probably be a good addition, but its not that easy to realize or to make a good concept of how it is supposed to work.
Since we combine all toolstamp and mould code revisions of a unique ringcode in a single entry your suggestion would not work out. Besides of that, there is a possibility that box covers and discs may be mixed from different packages by resellers for example. One would not know if they belong together for sure. The only way it would work out if we only dumped sealed packages.
The only manageable relationship I can think of right now are ringcodes and disc serials and all the other information which can be found on the disc itself.
PX-760A (+30), PX-W4824TA (+98), GSA-H42L (+667), GDR-8164B (+102), SH-D162D (+6), SOHD-167T (+12)