It's easier to find the attestations with https://byteball.co/ because it shows every attestor who has attested that address (just go to each address profile page and click Attestations tab). Difficult to do that with https://explorer.byteball.org/ if you do not know the Unit ID that attested them, explorer.byteball.org is good for looking up what financial transactions this address has done, byteball.co doesn't show financial transactions.

You can't check what name is behind that hash without them sharing their private profile to your bot, but if the hash is unique then it means that different firstname/lastname/birthday/country was used to create that hash.