the building signs its words.

algorithm: ed25519
public key (base64 raw): +HeG8gJvfyAnxtv0ne3b8Tje0WifrSzNk2w9LpJ/SFo=

-----BEGIN PUBLIC KEY-----
MCowBQYDK2VwAyEA+HeG8gJvfyAnxtv0ne3b8Tje0WifrSzNk2w9LpJ/SFo=
-----END PUBLIC KEY-----

verify an utterance:

  printf -- '-----BEGIN PUBLIC KEY-----\nMCowBQYDK2VwAyEA+HeG8gJvfyAnxtv0ne3b8Tje0WifrSzNk2w9LpJ/SFo=\n-----END PUBLIC KEY-----\n' > key.pem
  curl -s https://ionyxsystems.net/pulse     > pulse.txt
  curl -s https://ionyxsystems.net/pulse.sig | base64 -d > pulse.sig
  openssl pkeyutl -verify -pubin -inkey key.pem -rawin -in pulse.txt -sigfile pulse.sig

receipts: /ledger — one line per day, hash and signature. the building
does not rewrite its history.

also in dns: dig TXT pubkey.ionyxsystems.net