#!/bin/bash

path="/path/to/local/output/file.txt"
bitcoin=""
datetime=$(date "+%d-%b-%Y")
host="canary.example.com"
user="sftp_username"
remotepath="/home/sftp_username";
myname="Name"

# Get the current bitcoin hash
echo "Enter most recent Bitcoin hash (https://bitref.com/block):"
read bitcoin

cat >$path.tmp <<EOL
I am ${myname}.
I am in full control of this encryption key and this server.
No data on this server has been compromised and this encryption key has not been disclosed to anyone.
The date is ${datetime}.

The latest bitcoin block hash is:
${bitcoin}
EOL

cat $path.tmp

gpg --output $path --sign --armor --clear-sign $path.tmp

# SFTP file to remote host
sftp $user@$host <<EOF
cd  $remotepath
put $path
EOF

rm -f $path.tmp
rm -f $path