Bitcoin WhosWho

Bitcoin Who's Who is a crowdsourced intelligence database that attempts to attribute Bitcoin wallet addresses to real-world entities through community-submitted reports, scam databases, and aggregated intelligence from fraud investigations. It functions as a reputation and attribution layer on top of raw blockchain data.

For OSINT investigators, Bitcoin Who's Who is most valuable during fraud and scam investigations where a target Bitcoin address needs to be checked against known bad actor databases. The platform aggregates reports from scam victims, fraud researchers, and blockchain analysts, creating a searchable database of flagged addresses with associated entity information.

When investigating a Bitcoin address received from a suspect transaction, running it through Bitcoin Who's Who can immediately surface whether it has previously been reported in connection with ransomware payments, investment fraud, dark web markets, exchange hacks, or other illicit activity. The community-contributed nature of the database means it often captures emerging fraud campaigns before they appear in commercial threat intelligence feeds.

The platform also provides basic blockchain explorer functionality — balance checks, transaction history, and first/last activity timestamps — so investigators can combine attribution intelligence with on-chain data in a single interface.

Common investigation workflows include validating Bitcoin addresses found in phishing emails or fake investment schemes, checking whether a ransom payment address is associated with a known ransomware group, and cross-referencing addresses from fraud victim reports against the existing database to identify pattern connections.

Always record the date of your query and screenshot the attribution data shown, as community databases are updated continuously and historical states may change.