Tweetkeep proof for X post 1257422386439360515 by @citizenlab
https://x.com/citizenlab/status/1257422386439360515
First archived 2026-10-22 11:35 UTC

Post text, saved 2026-10-22 11:35 UTC
  File     https://tweetkeep.com/proof/1257422386439360515/text
  SHA-256  2c61dc3437f91337f401a7ac8b7f650e2741a53e013b1d8ab0a3e475d8c4ad87
  Listed in https://tweetkeep.com/data/proofs/2026-10-22T1150.txt
  Bitcoin timestamp of that list: https://tweetkeep.com/data/proofs/2026-10-22T1150.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 11:34 UTC  https://tweetkeep.com/warc/2803.warc.gz
    SHA-256  7404b8cf5e428b3c9f081ab2d18e81abcd876331248dca580d2c4e03945cf95f
    Listed in https://tweetkeep.com/data/proofs/2026-10-22T1150.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