Registry dates
Authoritative registry RDAP records expose public registration and expiry events where available.
Evidence catalog
What EstateClock checks on an authorized public domain.
TLS certificates
Owned direct handshakes capture the currently presented certificate, issuer, subject and expiry date.
DNS delegation
Nameserver observations identify the public delegation that needs an accountable owner during a registrar move.
Reachability
A conservative HTTPS request records reachability and redirect posture, without crawling or active scanning.
Paid assessments add BuiltWith observations: related sites, subdomains, redirects and historical technology or infrastructure context. Those observations are evidence for review, not ownership facts.