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 simply a record of transactions or balances. In traditional finance, a ledger might be kept privately by a bank; in cryptocurrency, a blockchain functions as a distributed ledger, meaning the record is replicated across many independent computers rather than held by one institution, with new entries added only when the network agrees on their validity.

Why it matters

The shift from a private, single-party ledger to a distributed one is the core innovation crypto is built around: instead of trusting one institution’s internal books, participants can independently verify the shared record themselves. This is also why the term “ledger” is sometimes used loosely as a synonym for “blockchain” in casual conversation, even though ledger is the broader, older concept.

Example

See our entry on blockchain for how a distributed ledger is technically structured into linked blocks.

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.