In this episode of HashrateUp, Jesse breaks down exactly what's inside a Bitcoin block — and why each of the 6 fields in the block header matters for miners, nodes, and the security of the entire network.

From the version number that signals miner upgrades, to the nonce that changes 270 trillion times a second — Jesse walks through every field and then opens a real block live on mempool.space to show you what it looks like in practice.

Whether you're new to Bitcoin mining or just want to understand what your miner is actually doing, this episode gives you a clear, visual breakdown of how Bitcoin blocks are structured and why they can't be tampered with.

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