I'm tempted to shout fir....! Never trusted CDs, DVDs or any other storage media for that matter, for longer than a few years. But then, that's how long data is usually important, until advent of digital photography, etc. So far, leapfrogging (buy a new one every few years) hard drives is medium of choice, with online backup of a few other things. But what about the family "photo album"?
Read an article a few years ago that said the most secure form of data storage was pigment based ink on archival quality paper - believed to last hundreds of years. You can print 2D array of data which can be easily read with inexpensive scanners. Downside is "areal density", a little low.