Which bitcoin documentation is the official one for bitcoin core? English Google searches about bitcoind and bitcoin-cli often lead to two sites:


https://en.bitcoin.it
https://bitcoin.org


Any idea which one is the official one, endorsed by the maintainers?
As far as I know there is no official documentation.

The closest you can get to it is the combination of the GitHub:
https://github.com/bitcoin/bitcoin

With the whitepaper:
https://bitcoincore.org/bitcoin.pdf

Changelog appears with every version on the core site, e.g.:
https://bitcoincore.org/en/releases/0.12.1/

And lastly, while I already linked to GitHub it is probably worth mentioning that open and closed issues are documented there:
https://github.com/bitcoin/bitcoin/issues?utf8=%E2%9C%93&amp;q=

Hope this helps.