A blockchain, originally block chain, is a growing list of records, called blocks, which are linked using cryptography. Each block contains a cryptographic hash of the previous block, a timestamp, and transaction data. By design, a blockchain is resistant to modification of the data.
Trying to Mine block 1...
Block Mined!!! : 000002695cd212abb189c53d6f1bddc1f5568d053d84ae5599236d7cfe26d589
Trying to Mine block 2...
Block Mined!!! : 00000747339b341a75418053c29561d39a9e1fe6f2127e37c80a2119fa24d2d9
Trying to Mine block 3...
Block Mined!!! : 00000fcb6382028245cf604677ecefc7d0703f3035a54b31b9d3f7563042c0ad
Blockchain is Valid: true
The block chain:
[
{
"hash": "000002695cd212abb189c53d6f1bddc1f5568d053d84ae5599236d7cfe26d589",
"previousHash": "0",
"data": "Hi im the first block",
"timeStamp": 1539539312661,
"nonce": 4184274
},
{
"hash": "00000747339b341a75418053c29561d39a9e1fe6f2127e37c80a2119fa24d2d9",
"previousHash": "000002695cd212abb189c53d6f1bddc1f5568d053d84ae5599236d7cfe26d589",
"data": "Yo im the second block",
"timeStamp": 1539539324019,
"nonce": 2974541
},
{
"hash": "00000fcb6382028245cf604677ecefc7d0703f3035a54b31b9d3f7563042c0ad",
"previousHash": "00000747339b341a75418053c29561d39a9e1fe6f2127e37c80a2119fa24d2d9",
"data": "Hey im the third block",
"timeStamp": 1539539333608,
"nonce": 512360
}
]