Looking on verbatims site, these look different than the mam-a gold disks that were sold under other brands like kodak etc. The mam-a disks use a gold reflective layer. The verbatim use a standard silver reflective layer, but in addition have a transparent gold layer that is supposed protect the silver layer. I couldn't find much info beyond that on their site.
As far as the 100 year plus claims, I'm not so sure I believe that. The question is, in real life, do they last longer (and is there really any way to know)? If the dye layer breaks down, does it mater if the reflective layer is still good?