{
  "local_file": "solution/themessage.txt",
  "raw_utf8_character_count": 6449,
  "normalisation": "retain ASCII A-Z only, preserving order",
  "normalised_letter_count": 6448,
  "normalised_sha256": "50BD9C4424DB47E15CC3A543C379B6EC722C8EAED76FBAEEF738B0427D4E8E75",
  "expected_sha256": "50BD9C4424DB47E15CC3A543C379B6EC722C8EAED76FBAEEF738B0427D4E8E75",
  "hash_matches_expected": true,
  "first_64_letters": "MYVZZJCKTBWKOWUWZOCZMPJHWHFATRZVLFNCLQIDRUVFMTAYMJUKERRTWRWEPHPW",
  "last_64_letters": "ZACPWOPAIXPDJDKYLYQNNZBRQXUNYKNBMIHGDQHFZEEQJNBBLGAJDGRLUZMVKAWK",
  "original_release_url": "https://pastebin.com/BcMucDVh",
  "source_status": {
    "pastebin_raw_url_checked": "https://pastebin.com/raw/BcMucDVh",
    "observed_status": "404 / no longer available during this audit",
    "interpretation": "The vanished primary host prevents a raw-byte comparison, but does not erase the contemporary preserved transcript and URL references."
  },
  "external_sources": [
    {
      "url": "https://scienceblogs.de/klausis-krypto-kolumne/2017/03/30/tengri-137-has-posted-again/",
      "role": "Contemporary preservation of the released ciphertext and the original Pastebin URL."
    },
    {
      "url": "https://old.reddit.com/r/tengri137/",
      "role": "Subreddit sidebar, archived in the live old-Reddit view, links themessage.txt to Pastebin ID BcMucDVh."
    },
    {
      "url": "https://old.reddit.com/r/tengri137/comments/635buu/prime_factors_of_3151_23_x_137_this_not_by_random/",
      "role": "Contemporary discussion establishes 3151 = 23 x 137 and identifies the adjacent decimal stream as the separate Arecibo-like bitmap stage."
    }
  ],
  "length_claims": {
    "actual": 6448,
    "47_x_137": 6439,
    "difference": 9,
    "23_x_137": 3151,
    "interpretation": "3151 belongs to the separately released decimal run-length/Arecibo stage; it is not a length of themessage.txt."
  },
  "verdict": "The local normalized specimen is a stable, fingerprinted working copy with a contemporary public provenance trail. No source found in this audit supplies a nine-letter padding/deletion rule for a 47 x 137 layout."
}