Qtum

What Is Qtum?

An Etherum and Bitcoin mashup bringing the best of both to the market.

4 minute read

Bitcoin’s ledger uses a model called UTXO, which stands for Unspent Transaction Output. What that means is that every transaction on the Bitcoin blockchain is a reference to one that came before, and anything unspent from the previous transaction (not sent to a new recipient) is sent back to the sender as change. The Bitcoin blockchain doesn’t track the balance of an account, it just tracks transactions, and builds new transactions from old ones.