> python btcProof.py mrl_notes0.4_copy.pdf
779
0
('checksum', '\xd3DC~')
15jVTLpbuU6cH39aqDxWWSb1UnKS2J7MbT
https://blockchain.info/address/15jVTLpbuU6cH39aqDxWWSb1UnKS2J7MbT