The BBC's experiment with Mastodon is pathbreaking in English-language news -- a major organization setting up its own instance. They've really thought this through. Key language:

"We're using social.bbc as the domain, so you can be sure these accounts are genuinely from the BBC. And by linking to and from the BBC’s website, we have verified our identity on Mastodon."

https://www.bbc.co.uk/rd/blog/2023-07-mastodon-distributed-decentralised-fediverse-activitypub

Welcome to:
@BBCRD
@BBC5Live @BBCRadio4
@BBCTaster
@Connected_Studio
@BBC_News_Labs

The BBC on Mastodon: experimenting with distributed and decentralised social media

Trialling ActivityPub and the federated model for social media and it's possibilities for the BBC.

BBC R&D
@dangillmor I really like how they point out fedi as being distinct from Mastodon-the-software-product.