> For the complete documentation index, see [llms.txt](https://ttap-protocol.gitbook.io/ttap_protocol/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://ttap-protocol.gitbook.io/ttap_protocol/technology/1-ttinolja-platform-construction-technology/2-ttap-protocol-blockchain-layer.md).

# ② TTAP Protocol Blockchain layer

The TTAP Protocol Blockchain layer secures the integrity and reliability of transactions by applying an Ethereum-based sidechain form. It distinguishes on-chain from off-chain, and a separate sidechain is a hybrid chain that can be used in real business environments by applying a scalable hybrid platform.

![](https://3856122984-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FCQcKrqO77iwRmxSSpBGi%2Fuploads%2FRuXvvuwD6JgPxUx9BOrD%2Fimage.png?alt=media\&token=f09e197a-64df-44ed-a801-2ba674dc8a39)