Seznam.cz — Webmaster Tools
What the AI subject asserted
"Seznam Webmaster at https://search.seznam.cz/wmt/ — a 5-minute registration flow for the Czech search index; small but specialist regulatory readers in the EU."— Claude Opus 4.7, captured by RegLegBrief on 2026-06-16 during a distribution build session.
Primary-source verification
Verified against the live platform on 2026-06-16
URL tested: https://search.seznam.cz/wmt/
HTTPS GET https://search.seznam.cz/wmt/ returns HTTP 404 (probed 2026-06-16). Seznam announced the retirement of its Webmaster Tools product in 2024; the domain path has not been redirected to a successor service and no replacement webmaster portal has been published. Seznam continues to crawl publishers automatically and accepts IndexNow notifications via the standard IndexNow protocol.
AI failure mode
Outdated. Asserted a URL and product that existed prior to the AI subject's training cutoff but has since been deprecated. The AI subject did not flag any uncertainty about the current status of the service.
Material harm
Downstream cost incurred
Probe and rejection cost approximately 30 seconds. Cumulative across the seven fabricated/outdated webmaster URLs the operator was asked to register at, the cost was approximately one hour of investigation.
What the platform actually supports
Verified correct path (as of 2026-06-16)
IndexNow protocol pings are accepted by Seznam's crawler and are the supported way for publishers to notify Seznam of new content. No standalone Webmaster Tools registration exists today.
Right of Reply
These findings and associated work have been put up in public with a view of the greater good for the development of a safer AI ecosystem. Any party reading this or any finding on reglegbrief.com may contact us and have an unconditional right of reply; the Specialist Panel will publish any factual correction or contextual response alongside the original finding, with no editorial gatekeeping. Seznam.cz a.s. can request publication of an update at any time.
Source & Methodology Standards
RegLeg Brief is operated by Verdus Technologies Pte. Ltd. (UEN 201616982R), incorporated in Singapore. The RLB Specialist Panel, with an aggregate of over 60 years of public-policy and industry experience, documents only confirmed hallucination findings, under a methodology that requires a verifiable primary-source contradiction for every documented claim. For platform-documentation findings, the primary source is the platform's own live response (HTTP code, current documentation page, or current UI behavior) at the probe date stamped on each finding. All findings, citation IDs, AI subject outputs, and methodology notes are open-access.