Episode Details

In this Sat Chats Short Stack, Chris and Stewart break down one of the most confusing parts of Bitcoin: the blockchain.

This is your crash course in the foundation of Bitcoin, built for beginners but juicy enough for veterans.

They compare it to a spreadsheet with tabs — each tab is a block of Bitcoin transactions, locked in and time-stamped. Each new tab connects to the one before it, creating a secure, unbreakable chain.

Chapters

00:00 Intro: What the heck is a blockchain?

01:05 What is a block? (Spreadsheet tab analogy)

03:02 What goes inside a block (transactions, timestamps, nonce)

04:45 How blocks get “chained” together

06:33 Why you can’t go back and change past blocks

08:01 Sat Chats analogy: Faking a past episode

09:15 Why chaining blocks makes Bitcoin secure

10:32 What decentralization really means (21,000+ nodes)

12:03 Why it’s not “just a Google Sheet in the sky”

13:15 Final thoughts

We cover:

✅ What is a block and what’s inside it

✅ How blocks get “chained” together

✅ Why tampering with Bitcoin is basically impossible

✅ What decentralization really means (and why it's not Google Sheets)

✅ Why you don’t need to trust banks anymore

They explain why you can’t rewrite the past, why faking a Sat Chats episode would be just as impossible, and how 21,000+ independent nodes around the world keep the whole system honest — no central server, no spreadsheet in the sky, just unstoppable code.