Here's a left-side-of-the-bell-curve way to do the Internet Archive "right":

- Create browser extension

- User loads page

- User clicks "archive" button

- Whatever is in user's browser gets signed & published to relays

- Archival event contains URL, timestamp, etc.

- Do OpenTimestamps attestation via NIP-03

- ???

- Profit

I'm sure there's a 100 details I'm glossing over but because this is user-driven and does all the archiving "on the edge" it would just work, not only in theory but very much so in practice.

The reason why the Internet Archive can be blocked is because it is a central thing, and if users do an archival request they don't do the archiving themselves, they send the request to a central server that does the archiving. And that central server can be blocked.