The puzzle above lead to a wallet containing 310 BTC. It contains some text and numeric character that seem to be clues to their resolution (L350K7DF641C20E89D9F4). At the current Bitcoin price, the profit is over 1.7 million euros.
who is behind it? Pip is an early BTC adopter. He mined a lot of bitcoins in the early days on a desktop computer.
Proof of ownership
Message:
https://bitcoinchallenge.codes/
BTC Address:
39uAUwEFDi5bBbdBm5ViD8sxDBBrz7SUP4 (View in block explorer)
Signature:
H03LFItN9jUXus+nwJd9wriCvTxXki2WxiQ5v5qWXbMjW1gPzK6BGmr4wAm0xsT2Is0/Qv0rXg+OSnehP1e4TvA=
Good luck!
Update: The 0.1 BTC price is gone already.
Please note you can't verify this in Bitcoin Core. Use a wallet like Electrum!