What is a blockchain?

From Wikipedia : A blockchain is a distributed database that maintains a continuously-growing list of records called blocks secured from tampering and revision.

Blocks

A sample blockchain data structure implementation in C# w/ data persistence.

Starting a new node

blocks --port 8000

Validating blockchain: Genesis

Hash: 27412103ae0823aa9fc40cde0445fc48e358be206ca8a28b5915aeb5012159f5
Previous: 81ddc8d248b2dccdd3fdd5e84f0cad62b08f2d10b57f9a831c13451e5c5c80a5
No: 0
Timestamp: 10/20/2017 7:54:39 PM
Nonce: 1744414568
Verified: True
Genesis: True

Ready.

http://localhost:8000

Press any key to quit...

Get the latest block

curl -X GET http://localhost:8000/

{
	hash: "27412103ae0823aa9fc40cde0445fc48e358be206ca8a28b5915aeb5012159f5",
	previous: "81ddc8d248b2dccdd3fdd5e84f0cad62b08f2d10b57f9a831c13451e5c5c80a5",
	no: 0,
	timestamp: "10/20/2017 7:54:39 PM",
	nonce: 1744414568,
}