What blockchains do BTC casinos use?

1) Bitcoin Core Network (BTC)

Most bitcoin casinos work with the original Bitcoin blockchain. Its advantages:

Decentralization and sustainability - the BTC network is considered the most reliable and secure.
Transparency - all transactions are verified on the public blockchain.
Global recognition - any casino that accepts cryptocurrency supports BTC.

The disadvantage is high fees during periods of network congestion and relatively slow confirmation of transactions (10 minutes or more).

2) Bitcoin Lightning Network

To get around the limitation of the main network, many casinos implement the Lightning Network - this is the second layer (Layer 2), which allows:

conduct transactions in seconds;
reduce fees to almost zero;
use BTC more efficiently for micropayments.

Lightning is actively gaining popularity among online casinos, as it allows players to top up their account without delay.

3) Ethereum and compatible networks

Some multi-currency casinos, in addition to BTC, use Ethereum and its ecosystem (ERC-20 tokens). But bitcoin can also be used here - in the form of wrapped tokens (WBTC).

WBTC (Wrapped Bitcoin) is an Ethereum-based token that reflects the price of real BTC and is used for fast deposits and interaction with smart contracts.
The advantage is high compatibility with DeFi and dApp platforms.
The disadvantage is commissions in the ETH network when loading the blockchain.

4) Tron and other alternative blockchains

Part of the casino connects BTC through third-party blockchains to reduce fees and speed up payment processing:

Tron (TRC-20) - cheap and fast transactions, popular with Asian players.
Binance Smart Chain (BEP-20) - allows you to use Binance-Peg BTC.
Polygon (MATIC) - second-level solutions for quick exchange and transfers.

Such integrations offer flexibility but require trust in third-party bridges and tokens.

5) Private and hybrid blockchains

Some casinos are experimenting with hybrid systems:

part of the transactions is recorded in public blockchains,
part - in closed registers to speed up processing.

This allows you to balance between safety and speed.

6) The bottom line

BTC casinos most often use the classic Bitcoin network for deposits and withdrawals, as well as the Lightning Network for instant transfers. Solutions like WBTC on Ethereum, Binance Smart Chain and Tron are actively used in multi-currency platforms. It is important for the player to check which blockchain a particular casino supports, as this affects fees, transaction speed and security level.