Tweetkeep proof for X post 991405092212559873 by @citizenlab
https://x.com/citizenlab/status/991405092212559873
First archived 2026-10-22 12:41 UTC

Post text, saved 2026-10-22 12:41 UTC
  File     https://tweetkeep.com/proof/991405092212559873/text
  SHA-256  4a02ba17e4b75f03d60642daff8f815c7ae3262ec88730b98f835097cec9d9e1
  Listed in https://tweetkeep.com/data/proofs/2026-10-22T1250.txt
  Bitcoin timestamp of that list: https://tweetkeep.com/data/proofs/2026-10-22T1250.txt.ots

X's own data for this post as it reached our browser, as WARC records (open with any WARC tool, e.g. https://replayweb.page):
  2026-10-22 12:41 UTC  https://tweetkeep.com/warc/2963.warc.gz
    SHA-256  96ad17c24631e7fb9e2216b7c810617624a368891207bc72f24e98e06ad6d3a3
    Listed in https://tweetkeep.com/data/proofs/2026-10-22T1250.txt

No Internet Archive copy: we ask it for a few hundred fresh posts a day, from the accounts that delete the most. X's data for every post is in the WARC records above.

How to check:
1. Download a file above and run: shasum -a 256 <file>. It must print the SHA-256 shown, and that hash must appear in the list.
2. Drop the list and its .ots file on https://opentimestamps.org, or run: ots verify <list>.ots
   That proves the list, and every file whose hash it holds, existed unchanged by then. Fresh timestamps reach Bitcoin within hours.
More: https://tweetkeep.com/faq#proof