What is the public key of cache.nixos.org?

[busti]

And how do I find out myself? Where is the public key located usually?

[erictapen]

It’s defined here: https://github.com/NixOS/nixpkgs/blob/1f949558617ebb18bbf7005c1c4dc3407d391e93/nixos/modules/services/misc/nix-daemon.nix#L806