---
title: "What Is a Sidechain (PDF)"
url: "https://bip39-phrase.com/list-phrase/what-is-sidechain-bip39-phrase-2025-11-11/"
language: "en"
updated: "2026-10-21T00:00:00+00:00"
---

# What Is a Sidechain

What do you do when you’re stuck in traffic along a highway?

PDF document · Published November 11, 2025 · Updated October 21, 2026 

[ Open the PDF (3 pages, 71 KB) ](/list-phrase/what-is-sidechain-bip39-phrase%5F2025-11-11.pdf) 

## Contents

1. Sample sequences of BIP39 words
2. Reading a BIP39 phrase
3. See also

Topic: 

[BIP39 for Developers: Python Code, EVM Contracts and API Keys](/topics/developers/)

## Guides on the same subject

- [Generate a BIP39 Seed Phrase in Python: Code and Test Vectors](/seed-phrase-generation-using-python/)  
Generate and check BIP39 seed phrases in Python: entropy, checksum, wordlist and PBKDF2 seed, with standard-library code tested against official vectors.
- [What Is the Bitcoin Mempool and How Does It Work?](/bitcoin-mempool/)  
The Bitcoin mempool is each node's queue of unconfirmed transactions. Miners take the highest fee rates first; stuck payments can be sped up with RBF or CPFP.
- [OpenAI API Key Format: sk-proj, sk-svcacct and sk-admin](/openai-api-key-format/)  
An OpenAI API key starts with sk-proj- (project), sk-svcacct- (service account) or sk-admin- (admin) and is sent as a bearer token. How to check and store one.

One of the documents in the [Seed Phrase PDF Archive](/list-phrase/), listed on [archive page 7](/list-phrase/7/).