Python script to download the bitcoin whitepaper directly from the blockchain itself.

get-whitepaper.py

#!/usr/bin/env python

# This script is a modified version of the script found here:
# https://bitcoin.stackexchange.com/questions/35959/how-is-the-whitepaper-decoded-from-the-blockchain-tx-with-1000x-m-of-n-multisi

from __future__ import print_function
import subprocess
import sys
from binascii import unhexlify
from hashlib import sha256
if int(sys.version[0]) == 2:    # Works with older version of Python
    from urllib2 import urlopen
else:
    from urllib.request import urlopen

save_file = "bitcoin.pdf"

# Do not change this!
whitepaper_txid = "54e48e5f5c656b26c3bca14a8c95aa583d07ebe84dde3b7dd4a78f4e4186e713"

try:
    #raw = urlopen("https://blockchain.info/tx/" + whitepaper_txid + "?format=hex").read()
    raw = subprocess.check_output(["bitcoin-cli", "getrawtransaction", whitepaper_txid])
    assert sha256(sha256(unhexlify(raw)).digest()).digest() == unhexlify(whitepaper_txid)[::-1]
except:
    print("Error retrieving bitcoin transaction which contains the pdf data. Exiting...", file=sys.stderr)
    sys.exit(1)

if int(sys.version[0]) == 2:
    outputs = raw.split("0100000000000000")
    pdf = ""
else:
    outputs = raw.split(b"0100000000000000")
    pdf = b""

for output in outputs[1:-2]:
    cur = 6
    pdf += unhexlify(output[cur:cur+130])
    cur += 132
    pdf += unhexlify(output[cur:cur+130])
    cur += 132
    pdf += unhexlify(output[cur:cur+130])
pdf += unhexlify(outputs[-2][6:-4])

with open(save_file, "wb") as f:
    f.write(pdf[8:-8])

Hello Max, Your script stopped working.
Cheers, Vince
Error retrieving bitcoin transaction which contains the pdf data. Exiting...