If you’re new to cryptocurrency, you’ve probably seen terms like blockchain and transaction ID (Hash ID) while making or tracking a payment.
These concepts are at the heart of how crypto works and understanding them will help you follow your transactions with confidence.
What is a blockchain?
A blockchain is a digital public ledger, a record of all transactions that have ever taken place for a specific cryptocurrency.
Instead of being stored in a single place (like a bank’s server), it’s shared across thousands of computers worldwide.
Each set of new transactions is grouped into a block, and every block is connected to the one before it, forming a “chain” of blocks, or blockchain.
In simple terms:
Each transaction = a record of movement (who sent what and to whom).
Each block = a collection of verified transactions.
The chain = the entire history of all transactions for that cryptocurrency.
Because every block is verified by the network, the blockchain is:
Transparent: Anyone can view transactions publicly.
Secure: Data is encrypted and cannot be altered once confirmed.
Decentralised: No single company or government controls it.
How a blockchain transaction works
When you send cryptocurrency (for example, Bitcoin or Ethereum):
You create a transaction by entering the recipient’s wallet address and the amount.
The network checks (verifies) that you own those funds.
The transaction is then broadcast to the blockchain network.
Miners or validators confirm it and add it to a new block.
Once added, your transaction is permanent and can’t be changed or cancelled.
The time it takes for this process depends on the network speed, transaction fee, and current congestion.
What is a transaction ID (TXID)?
Every transaction on a blockchain is assigned a unique code called a Transaction ID (often shown as TXID or Transaction Hash).
It acts as a digital receipt, allowing anyone to find and verify your transaction on the blockchain.
A typical TXID looks like this:
59a7b48ad9053f082237eed70702f0d77ea4c4b7a0508cef39ec086ef7d27236
How to use a TXID
You can use your TXID to track and confirm a crypto transfer. Here’s how:
Copy your TXID from your transaction history or confirmation email.
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Go to a blockchain explorer that matches your crypto’s network, for example:
Bitcoin → https://www.blockchain.com/explorer
Ethereum → https://etherscan.io
Tron (USDT TRC20) → https://tronscan.org
Paste your TXID into the search bar.
You’ll see full transaction details — amount, time, confirmations, and wallet addresses.
The “confirmations” number shows how secure your transaction is.
More confirmations = higher certainty that the transaction is complete.
It is normal for your transaciton to initially be pending confirmations first before it succeeds on the blockchain.
Understanding blockchain and TXIDs helps you verify that your crypto was sent or received successfully, track the status of pending transactions, resolve issues faster when contacting support and gain confidence in how crypto transactions actually work.
Key takeaways
A blockchain is a public, secure record of all crypto transactions.
Each transaction creates a unique Transaction ID (TXID) that can be used to track it.
You can view any transaction on a blockchain explorer using its TXID.
Once confirmed, a blockchain transaction cannot be reversed or changed.