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Verifying Bitcoin Addresses: A Guide for Website Owners

As the popularity of blockchain technology grows, so does the interest in exploring its various applications. One such application is verifying Bitcoin addresses, which can be a useful feature on websites hosting large amounts of public addresses. In this article, we will cover the basics of how to verify Bitcoin addresses and provide guidance on implementing automatic verification options.

Understanding Bitcoin Addresses

Before diving into verification, it’s essential to understand how Bitcoin addresses are structured. A Bitcoin address is a unique string of characters that represents an individual’s cryptocurrency wallet. It typically consists of four or five hexadecimal numbers separated by hyphens (-). The first part of the address (the «prefix» or «mainnet prefix») identifies the network and protocol version, while the remaining parts represent the recipient’s account balance.

Verifying Bitcoin Addresses

To verify a Bitcoin address, you need to determine whether it belongs to an existing wallet. Here are the steps:

• Check the address length: Make sure the address is a valid Bitcoin public address, which should consist of four or five hexadecimal numbers separated by hyphens.

• Look for known addresses

  

  : Search online directories like Blockcypher or Blockchain.com to find known addresses with matching prefixes and account balances. This can help you verify that an address belongs to an existing wallet.

• Use a hash function: Calculate the SHA-256 hash of the address using a digital signature tool like Etherscan or Blockexplorer. Compare this hash with the corresponding output on one of these websites. If they match, it indicates that the address is likely belonging to an existing wallet.

Implementing Automatic Verification

To provide automatic verification options for users, you can follow these steps:

• Choose a blockchain API: Select a reliable API provider like CoinGecko, Blockchain.com, or Coinbase’s APIs to fetch Bitcoin addresses and their balances.

• Store the data: Store the fetched addresses and their corresponding hashes in your database or local storage.

• Implement verification logic: When a user requests an address, query the chosen API for its balance and hash. Compare the provided address with the stored one using the hashing algorithm mentioned earlier.

• Display verified results: Display a confirmation message to users indicating that the address is verified.

Example Code in Python

Here’s an example of how you can implement automatic verification on a website using Flask, a popular Python web framework:

from flask import Flask, request, jsonify


app = Flask(__name__)



Store addresses and their balances in a database

addresses_db = {}



Fetch address data from the API

def get_address_data(address):

    api_url = f"

    response = requests.get(api_url)

    if response.status_code == 200:

        return response.json()[address]["usd"]

    else:

        return None



Verify an address and display a success message

@app.route("/verify/", methods=["POST"])

def verify_address(address):

    address_hash = get_address_data(address)

    verified = hashlib.sha256(address.encode()).hexdigest() == address_hash

    if verified:

        return jsonify({"message": f"Address {address} is verified"})

    else:

        return jsonify({"error": "Invalid address"}), 400


if __name__ == "__main__":

    app.run(debug=True)

Conclusion

Verifying Bitcoin addresses can be an essential feature on websites hosting large amounts of public addresses.

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