I’m far from an expert, but anything on standards JIS X6257 / ISO 18630 would probably be a good start. It’s an open standard for 100+ year discs.

Otherwise probably best to look into accelerated aging studies. For technology that’s less that 100 yrs old to claim 100 or 1000 is a bit uncertain but accelerated aging is probably the closest to a best guess. I recall skimming over a third party lab saying Verbatim gold foil archival DVDs were estimated to last 30-120 years depending on storage methods and luck, but never saved the link.

Oh yeah, stick it in the sun or a damp box and either will probably be bad in weeks instead of decades or centuries. But supposedly they’ll meet those lifespans good at room temp

Kinda funny, I was just writing about archival media this morning. Verbatim makes DVDs & Blue Rays that last ~100 years, and M-DISC makes ones that’ll last ~1000 years. And the Verbatim Blu Rays run ~$0.036 per gig.

The account ownership one is definitely my first thought too. Using keypairs to identify accounts controlled by the user would be great. You can hide it behind a normal looking username with your (or a third party’s) domain on both Nostr and AT (though AT’s not fully developed, but it’s totally in control of the user and doing that with activity pub could hand the metaphorical keys of your account to you instead of the server. Another way would be to allow users to use their own domain with an existing third party server, or use something similar to Zot’s (Hubzilla) “Nomadic Identities” that let you mirror your account on another server.

Implementing quote posts is a little above my pay grade, but I actually think that the link option might be a great idea. Nostr does quote posts by just embedding the post into your post where the nevent is pasted in, making both regular quote posts and the general ability to embed any post anywhere in your post. That sort of functionality, just using links to posts instead of nevents could be neat to standardize into activity pub as well, especially if all the other activity pub software already is doing that. Though again, not exactly a dev, so who knows if that’d break things.

I assume Lemmy and Mastodon are the same way in that they won’t search outside their databases when logged out? If so that’d explain why. Thanks!

Actually one already exists at https://mostr.pub. A dual Activity Pub/Nostr server called ditto is also in the works.