[simonjgreen]

First example I thought of is the titanium punch sheets and wordlists for crypto wallet recovery phrases https://shop.ledger.com/products/cryptotag-zeus and https://github.com/bitcoin/bips/blob/master/bip-0039/bip-003...

There is also Microsoft Project Silica which I recall seeing in person at their EBC playing back a movie from it https://www.microsoft.com/en-us/research/project/project-sil...

Then there is m-disc which uses the DVD+R and BD-R/BDXL standards but writing to a sort of glass rather than to the traditional medium. These are cool as they play back n regular players too. https://www.mdisc.com/

[dzidol]

Unfortunately, currently produced mdisks are not the same as older ones. Requirements for media has been relaxed a while ago, most disks are not meant to last 1000 years anymore. Still, I don't know any viable alternative, besides maybe LTOs if you're lucky to know somebody with reasonable drive (not sure about US, in EU drives are quite expensive, and I mean used drives of course).

Edit: found Reddit discussion I learned that from: https://www.reddit.com/r/DataHoarder/comments/13693k0/new_de...