UTXO (Unspent Transaction Output)
Transactions● Common
The fundamental unit of bitcoin ownership. Each UTXO represents a discrete amount of bitcoin locked to a specific script (usually a public key hash). Transactions consume UTXOs as inputs and create new UTXOs as outputs. Your balance is the sum of all UTXOs you can spend.
Technical Notes
UTXO set: all spendable outputs, stored in memory by nodes (~5-8 GB). Each UTXO has: txid, output index, value (satoshis), scriptPubKey. Inputs reference UTXOs by txid:vout. UTXO model prevents double-spending and enables parallel validation.
Metadata
Visibility: Public
Created:1/3/2026by System