Every check on this page runs in your own browser against the public log. You don't have to trust us for any of it.
To check one record instead, from its hash to the Bitcoin block that covers it: verify a record.
Your browser fetches the log's current state and checks each witness's signature itself, using the key each witness publishes on its own site. One catch: this page comes from us, the people it's checking. To check without involving us at all, use the witness policy and standalone verifier.