From 004e7d599566ebf8e3b7b6e66d4dac4d08d76326 Mon Sep 17 00:00:00 2001 From: "myarbrough@oreilly.com" Date: Wed, 5 Nov 2014 10:34:58 -0800 Subject: [PATCH] Made changes to ch07.asciidoc --- ch07.asciidoc | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/ch07.asciidoc b/ch07.asciidoc index 19afa069..6e4de7ee 100644 --- a/ch07.asciidoc +++ b/ch07.asciidoc @@ -51,7 +51,7 @@ The block header consists of three sets of block metadata. First, there is a ref The nonce, difficulty target, and timestamp are used in the mining process and will be discussed in more detail in <>. [[block_hash]] -=== Block Identifiers—Block Header Hash and Block Height +=== Block Identifiers: Block Header Hash and Block Height The primary identifier of a block is its cryptographic hash, a digital fingerprint, made by hashing the block header twice through the SHA256 algorithm. The resulting 32-byte hash, is called the _block hash_ but is more accurately the _block header hash_, because only the block header is used to compute it. For example, the block hash of the first bitcoin block ever created is +000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f+. The block hash identifies a block uniquely and unambiguously and can be independently derived by any node by simply hashing the block header.