It has an entry on wikipedia
https://en.wikipedia.org/wiki/Waste_Iso ... ure_humans https://en.wikipedia.org/wiki/Long-time ... g_messages so it's probably real (weak citations) but the idea that an interdisciplinary team without an artist would think that they should store the warnings on CDs is pretty laughable. Are artists particularly known for their understanding of data format integrity?
I say it's a waste of money to get an artist on board (I understand the people involved here are dealing with so much money that one artists salary for an entire lifetime is meaningless so why not bring one aboard) because isn't this a project which needs the least amount of art (transformation of symbols or cave shadows or whatever) possible? There may be some evolution induced aversions humans have (though obviously in 10k years we wouldn't know if they still existed because people might be floating roboheads in jars or whatever) but you would almost definitely need science (unbiased, causally isolated observation) to work these out. The idea that one sole artist would have much useful input (outside of relevant book knowledge that you need no artistic ability to synthesise) seems unlikely. And eventually, probably you would discover that as there's not much you could guarantee would warn humans away (because even if you could make a warning, plenty of people will see a warning and walk straight towards it) so you would try to just build something really secure.
What's kind of interesting is that instead of doing the above and leaving it (because really who cares if some guy 9 thousand years from now gets wasted by radioactivity) they make a big deal of assembling an interdisciplinary team to sit and think about the issue and publish magazine articles and DO involve an artist, making it kind of clear that the whole enterprise is actually a kind of art project in the end rather than a real, rigorous attempt to communicate with the future.
Sort of relevant
http://longnow.org/clock/