# Microsite provenance key

- **URL:** https://airsenseenvironmental.com/provenance/
- **Published:** 2026-10-10

Air Sense Environmental operates ten radon information websites. Each one publishes timestamped, signed records for its machine-readable files (such as llms.txt and its reference files) on its own provenance page. This page publishes the same signing key here, so the records can be tied to Air Sense Environmental. Signing key Fingerprint: SHA256:JT+7sat5ESA/kQfxzQsMRyX4eKKcc7CCyY3+PTYbip0 Public key (Ed25519, OpenSSH format): ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIFeFf7o2CO8N8HFVgQe/kyIn5Er/qzaSm+Hfi9oN3bOi A record verifies only if its signature matches this key. A signature and timestamp show that a file existed in an exact form by a certain time and was listed by the key holder. They do not show that the content is correct. Websites using this key stlouiscommercialradon.com radoncoststlouis.com jeffcoradon.com metroeastradon.com radonmitigationstlouis.com stlouishomeradontest.com radonrepairstlouis.com stcharlescountyradon.com radontestingstlouismo.com westcountyradon.com If this key is replaced or withdrawn, this page will state the date and the new fingerprint.