# How to verify a block header in Cosmos SDK?

**URL:** <https://forum.cosmos.network/t/how-to-verify-a-block-header-in-cosmos-sdk/7025>\
**Category:** Miscellaneous\
**Created:** [August 10, 2022, 12:16pm UTC](https://forum.cosmos.network/t/how-to-verify-a-block-header-in-cosmos-sdk/7025 "2022-08-10T12:16:58Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![exachad](https://avatars.discourse-cdn.com/v4/letter/e/f04885/32.png) [@exachad](https://forum.cosmos.network/u/exachad)\
**Post date:** [August 10, 2022, 12:16pm UTC](https://forum.cosmos.network/t/how-to-verify-a-block-header-in-cosmos-sdk/7025/1 "2022-08-10T12:16:58Z")

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Hello everybody!  
I want to verify a block header is valid, with a known set of validators. I think to check the signatures of the validators, if the number of valid signatures is \> 2/3 then the block header is valid. But I don’t know how to implement it specifically yet. Thank you everyone