Glossary

Ledger

Plain-language definition Crypto glossary

Key takeaways

A ledger is a record of transactions and balances; in crypto it refers to the blockchain itself, the running history of every transaction the network has agreed on.
Rather than living in one institution's database, a blockchain ledger is distributed across many independent nodes that stay in sync through a consensus mechanism.
The shared, append-only ledger lets strangers agree on who owns what without a trusted middleman, and its transparency and tamper-resistance underpin how cryptocurrencies work.

Definition

A ledger is a record of transactions and balances. In crypto it refers to the blockchain itself — the running history of every transaction the network has agreed on.

How it works

Rather than living in one institution’s database, a blockchain ledger is distributed: copies are held and kept in sync across many independent nodes through a consensus mechanism. New transactions are grouped into blocks and appended in order, and once confirmed they become a permanent part of the shared record that anyone can inspect. Public chains let anyone read and write to this ledger, while permissioned ledgers restrict who can participate.

Why it matters

The shared, append-only ledger is what lets strangers agree on who owns what without a trusted middleman. Its transparency and tamper-resistance are the foundation of how cryptocurrencies work.

Example

Checking a coin’s transaction on a block explorer is simply reading an entry in its public ledger.

FAQ

Frequently asked questions

How is a blockchain ledger different from a bank's ledger?

A bank's ledger lives in one institution's database under its control, while a blockchain ledger is distributed, with synchronized copies held across many independent nodes. That shared, append-only structure lets participants agree on balances without trusting a single middleman.

What is the difference between a public and a permissioned ledger?

A public chain lets anyone read and write to the ledger, whereas a permissioned ledger restricts who can participate. The public model maximizes transparency and openness, while permissioned ledgers trade some of that openness for controlled access.

Can anyone view a blockchain ledger?

On public chains, yes. Once transactions are confirmed they become a permanent part of the shared record that anyone can inspect, for example by looking up a transaction on a block explorer. This transparency is a core feature of how these networks build trust.