Glossary

Off-Chain

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Off-chain is a term used to describe any data that is not registered on the Bitcoin blockchain. Off-chain data can be Bitcoin transactions that were not sent to the blockchain, data on the Lightning Network, or data on other blockchains, such as a sidechain.

Related Terms
Lightning Network
The Lightning Network (LN) is a protocol designed to allow instant and cheap Bitcoin transactions. While it is still experimental, it shows great promise for Bitcoin’s ability to scale.
Learn more.
Sidechain
A sidechain is a protocol that relies on the Bitcoin blockchain for data or security, but conducts its own operations on a separate blockchain.
Learn more.
Layer
The Bitcoin network has several layers which enable users to use their bitcoin outside of the Bitcoin blockchain. Examples of layers include the Lightning Network and the Liquid Network. Layered solutions allow innovation without threatening Bitcoin's security.
Learn more.
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