142 — Current evidence limit and public-index recheck
Checked 2026-09-05 UTC.

A direct GET of the Ubuntu paste index returned403. The web research tool returned an indexed rendering marked crawled today, showing seven recent entries and no xinzhai/xz labels. This rendering is not a verified live listing or a comprehensive absence check. No post body was fetched, and the excluded post was not accessed.
https://paste.ubuntu.org.cn/

The uploads directory still contains only the previously reconciled archive. The terminal xzsolve audit140 found no saved successful decryption. The latest source check141 excluded two particular standard containers but identified no producer.

Current obstacle: none of the investigated candidates has a provenance link to the actual XZ writer. The captured bytes do not distinguish the many possible small-record formats. Further arbitrary container exclusions or analogous projects would not establish that connection. No remaining concrete source lead from the recent rounds is awaiting inspection, and no specific live job is pending.

A linked writer/reader, format description, author disclosure, or authorized key plus construction parameters would change the next technical step. General entropy measurements, timer coincidences and arbitrary key guesses would not. This is a no-progress audit for cipher identification, not a claim that the mystery is solved or that the answer is absent from the internet.

Final status: three consecutive no-progress audits confirmed the same missing provenance. Goal recorded as blocked, not complete. The website and all reports remain available. No claim is made that the answer cannot be found; current evidence does not support further discriminating analysis.