If bitcoincore.org goes down how can I access it? What can I do to help others access it? bitcoincore.org is a trusted resource for information on new Bitcoin Core releases and soft fork upgrades. How do I access it if it is taken offline? How can I help others access it if it is taken offline?
Wladimir van der Laan answered this on Mastodon.

if you want to help, make mirrors (can we do something like &quot;deterministic verifiable builds for websites&quot;?), host the files, seed the torrents

Is there a more robust way to create a mirror exist now, other than wget -mkxKE -e robots=off https://bitcoincore.org?

Yes wget seems suboptimal. The robust way is to clone the website off github (git@github.com:bitcoin-core/bitcoincore.org.git), so that you have a copy of the source code as well, then you can build it yourself. That gets all releases and verifies them against their gitian.sigs hashes


However that's for the website—it won't give you a copy of the historical release binaries, i'm not sure of a good way to mirror those, maybe best would be to make a script based on https://github.com/bitcoin/bitcoin/blob/master/test/get_previous_releases.py and https://github.com/bitcoin-core/bitcoin-maintainer-tools/blob/master/gitian-verify.py


This one might actually be best, it downloads SHA256SUMS.asc for an arbitrary release, verifies the signature, and downloads all the files mentioned in it: https://github.com/bitcoin/bitcoin/tree/master/contrib/verifybinaries