How to find the genesis block of a new mineable coin?

The genesis block is the first block in a blockchain, hardcoded into the coin's source code and containing key details like timestamp and initial mining rewards.

Jul 15, 2025 at 09:15 am

Understanding the Genesis Block Concept

The genesis block is the first block ever mined in a blockchain. It serves as the foundation for the entire network and contains specific data that sets up the initial conditions of the cryptocurrency. For new mineable coins, this block typically includes the timestamp, the creator's message or signature, and sometimes a reference to an external event like a news headline.

In most cases, the genesis block is hardcoded into the coin’s source code during its creation. This means that when you're trying to find the genesis block of a new mineable coin, you’re essentially looking for the very first entry in the blockchain that starts with a predefined set of parameters.

Important: The genesis block does not reference any previous blocks because it is the starting point.

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Checking the Source Code Repository

Most new mineable cryptocurrencies are open-source projects hosted on platforms like GitHub or GitLab. These repositories often contain the complete blockchain configuration files, including the genesis block definition.

To locate the genesis block within the source code:

• Search for files named blockchainparams.cpp, chainparams.cpp, or similar variations depending on the project structure.
• Look for functions such as GenesisBlock() or variables like genesis.
• Review the content inside these functions to identify details like the hash, timestamp, and initial mining reward.

If the repository has multiple branches, ensure you're examining the correct one—usually the main or master branch.

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Exploring Blockchain Explorers for New Coins

Once a new mineable coin has launched and started producing blocks, you can use a blockchain explorer to navigate through its chain. Many newer coins deploy their own explorers or use third-party services like Blockchair, Blockchair.com, or custom-built tools.

To find the genesis block via a blockchain explorer:

• Visit the official website of the coin and look for a link labeled Blockchain Explorer or Explorer.
• Type "1" in the search bar (since the genesis block is usually block number 0 or 1).
• Alternatively, check the earliest timestamp listed in the explorer’s homepage or statistics panel.

Some explorers also provide a direct link to the genesis block, especially if the developers have included it in the documentation or welcome message.

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Analyzing the Coin’s Whitepaper and Documentation

Before launching a new mineable coin, developers often publish a whitepaper or technical documentation outlining the blockchain’s architecture, consensus mechanism, and key milestones. These documents frequently include details about the genesis block.

To extract genesis block information from documentation:

• Download the whitepaper and perform a keyword search for terms like genesis block, initial block, or block 0.
• Check the technical appendix or implementation section for hashes, timestamps, or mining configurations.
• Review release notes or developer logs if available, as they might detail the launch process and genesis event.

Sometimes, the genesis block hash is published alongside the announcement of the coin’s launch on forums like Bitcointalk or social media channels.

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Using Command-Line Tools and Node Data

For advanced users who run a full node of the new coin, retrieving the genesis block directly from the node’s database is possible. Most cryptocurrencies store blockchain data locally after syncing.

To access the genesis block using command-line tools:

• Start by running the daemon of the coin, e.g., ./coind -daemon.
• Use the command getblockhash 0 to fetch the hash of the genesis block.
• Then execute getblock [hash] where [hash] is the value obtained from the previous step.
• Review the output for fields like version, merkleroot, and nonce which describe the block’s structure.

Ensure your node is fully synced before attempting these commands. If the node hasn’t completed syncing, the results may be incomplete or inaccurate.

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Frequently Asked Questions

Q: Can the genesis block be modified after the coin launches?

A: No, the genesis block is immutable once the blockchain is created. Any changes would require a hard fork and re-launching the entire network.

Q: Is the genesis block always mined by the creator?

A: Yes, since it’s the first block and no miners existed prior to its creation, the genesis block is typically generated by the developer or team behind the coin.

Q: Do all cryptocurrencies have a genesis block?

A: Yes, every blockchain-based cryptocurrency starts with a genesis block regardless of whether it’s mineable, pre-mined, or minted.

Q: Why isn't my blockchain explorer showing the genesis block even though the coin exists?

A: Some explorers index blocks starting from block number 1, skipping the genesis block. Try searching manually using the hash or checking the coin’s documentation for the correct block identifier.