Blu-ray disks, however, use a combination of silicon and copper which is bonded during the burning process, this alloy is much more resilient than the organic dye. Manufacturers claim a life span from 100 up to 150 years for Blu-ray disks.✝. ✝ = However, these media don't exist long enough yet to confirm or reject those claims. So at the moment, it's about as long as the oldest working DVD/BD is still working. These claims are made assuming the disks are stored properly.