First transaction block 170

The first Bitcoin transaction between two people was Satoshi Nakamoto sending 10 BTC to developer and cypherpunk Hal Finney, confirmed in block 170 on January 12, 2009 (03:30 UTC; January 11 in US time zones). Block 170 contains exactly two transactions: the coinbase and this payment. Finney, the recipient, was among the first to run the software — his post "Running bitcoin" (January 10, 2009) is an early-Bitcoin touchstone.

Common misstatements:

• "The pizza purchase was the first Bitcoin transaction." — The pizza trade (May 2010) is celebrated as the first documented commercial purchase; the first peer-to-peer transfer was Satoshi→Finney in January 2009.
• "Satoshi's first transaction proves who Satoshi was." — The transaction identifies keys, not people; Finney denied being Satoshi and the sender's identity remains unknown.