It links to a doi.org URL which directs the browser to what you linked.
> The DOI for a document remains fixed over the lifetime of the document, whereas its location and other metadata may change. Referring to an online document by its DOI should provide a more stable link than directly using its URL. But if its URL changes, the publisher must update the metadata for the DOI to maintain the link to the URL. It is the publisher's responsibility to update the DOI database. If they fail to do so, the DOI resolves to a dead link, leaving the DOI useless.
More about it at Digital Object Identifier (DOI) Under the Context of Research Data Librarianship - https://doi.org/10.7191%2Fjeslib.2021.1180
which reminds me, who has control over DOI.org ... eg. is it DOGE-safe ? likewise arXiv .. can it easily be co-opted / subsumed ?
It’s an independent foundation and they have backups/contingency plans established with major universities to preserve the DOI records in the event the foundation fails.
DOI must die
But magnet links and the BitTorrent mainline hash-table are a better DOI than DOI.
Don't get me wrong, I'm glad they exist, but they appear to guard against humans who are lazy and make mistakes sometimes rather than against a powerful adversary motivated to interfere with science. It might be time for an upgrade.