Funny how none of the bitcoiners thought to back this up on the BTC blockchain ... and instead think about saving it to PDF/Email...as if those won't be lost with time potentially.

I'd probably do as supertestnet says and backup the algorithm which explains how to get the binary bits out of glyphs and how that relates to bip39 list, which I assume I'd be able to pull up from the internet at any point in the future.

Then I'd probably link to the block/tx where I stored the data to "decrypt" the cypher.

If your data no longer exists on Bitcoin Ledger, most likely your bitcoin you're attempting to recover won't be worth anything anyways at that point... so I'd consider this a reasonable way to back up this information long term.

Reference Talk: "Jason Lowery - Softwar (MIT 2023)"