This sounds similar to what Keybase is working on <a href="https:&#x2F;&#x2F;keybase.io&#x2F;docs&#x2F;server_security&#x2F;merkle_root_in_bitcoin_blockchain" rel="nofollow">https:&#x2F;&#x2F;keybase.io&#x2F;docs&#x2F;server_security&#x2F;merkle_root_in_bitco...</a>