![Blockchain explained](https://ytimg.googleusercontent.com/vi/QphJEO9ZX6s/hqdefault.jpg)
Blockchain is a distributed, immutable ledger that allows you to track anything, including tangible or intangible assets. This allows users or organizations to digitally and securely record entries, which are in turn approved and secured by a community of users.
Watch this lightboard video with Sai Vennam from IBM Cloud as he takes a deep dive into blockchain technology and covers everything from smart contracts to permissioned and permissionless blockchains.
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