Bitcoin Hash Validation

Block Number: Block Hash:

Step 0: Enter Parameters

In the initial step it is necessary to get the required Parameters for the verification of the block hash. Visit a block explorer like: blockchain.com or btc.com
Alternatively enter a Block number in the filed above and click the Calculate Button to automatically get the necessary values.

Protocollversion: Hash of previous Block: MerkleRoot: Timestamp: Bits Difficulty Parameter: Nonce:

Step 1: Convert to Hexadecimal values

The Values from Step 0 need to be converted into hexadecimal form. The "Calculate Values" button below can make that automatically.

Protocollversion: Hash of previous Block: MerkleRoot: Timestamp: Bits Difficulty Parameter: Nonce:

Step 2: Convert into Little-Endian

The Values from Step 1 need to be converted into Little-Endian format. The "Calculate Values" button below can make that automatically.

Protocollversion: Hash of previous Block: MerkleRoot: Timestamp: Bits Difficulty Parameter: Nonce:

Step 3: Concatenate Values

The Values from Step 2 need to be concatenated together. The "Calculate Value" button below can make that automatically.
Order = version || PrevHash || MerkleRoot || Timestamp || Bits || Nonce

Concatenated Values:

Step 4: Double SHA-256 Application

Next apply twice the Sha256 Hash to the Value from Step 3. The "Calculate Value" button below can make that automatically.

1. SHA-256 Application: 2. SHA-256 Application:

Step 5: Convert SHA-256 Result in Little Endian

In the last step change to encoding of the value from Step 4 to Little-Endian the Result should equal the Block hash. The "Get Result" button below can make that automatically.

SHA-256 in Little Endian:

The tool for the Bitcoin Hash Validation provides you with the ability to either manually or automatically validate a Hah value of a block. To automatically check a block and its hash the user needs to provide a valid block number and can click in the Step 0 process the “get values” button, the necessary values are gathered from btc.com, in all subsequent steps you just needs to press the “calculate values” button and gets all required data for the final comparison in step 5. When you want to check the hash value manually, it is required by you to provide the required data. To check if the provided values are valid, use the “validate values” button which highlights wrong inputs with a red marking and correct one with a green one. The reset inputs buttons clear all fields.