# Merkle Trees in Bitcoin & BSV

This course explores how **Bitcoin — and the BSV blockchain — use Merkle Trees** to organize, verify, and secure transaction data across the network. You’ll see how every piece of data, from a raw transaction to the Merkle Root in a block header, plays a role in ensuring **integrity and trust** at scale.

You will explore:

* How raw **transaction data** is structured, serialized, and hashed to produce unique **Transaction IDs (TXIDs)**.
* How these TXIDs combine within **Transaction Merkle Trees** to represent and verify all transactions in a block.
* Why **double hashing (HASH256)** and **byte-order formatting** are used to standardize verification across the network.
* How Merkle Trees **grow dynamically** as new transactions are added, maintaining balance and efficient verification.
* Practical examples of how nodes use **Merkle Proofs** to confirm transaction validity without downloading the entire dataset.

By the end of the course, learners will:

* Understand how **transactions are transformed into TXIDs** and organized into **Merkle Trees**.
* Recognize how **Merkle Roots** ensure the authenticity and order of all transactions within a block.
* Appreciate how this structure enables **scalability, security, and efficiency** across the entire BSV network.

This beginner-friendly course assumes no prior knowledge of Bitcoin or cryptography — only curiosity about how **Bitcoin’s core data structure** keeps the system verifiable, transparent, and efficient at any scale.


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