Edited ch11_blockchain.adoc with Atlas code editor

ch11_blockchain.adoc

@@ -1,7 +1,7 @@
 [[blockchain]]
 == The Blockchain
 
-The blockchain is the history of every confirmed Bitcoin transaction.
+The ((("blockchain", "explained", id="blockchain-explain")))blockchain is the history of every confirmed Bitcoin transaction.
 It's what allows every full node to independently determine what keys and
 scripts control which bitcoins.  In this chapter, we'll look at the
 structure of the blockchain and see how it uses cryptographic
@@ -63,7 +63,7 @@ bitcoin for creating a new block--can be spent.
 While the
 protocol always allows a chain to be undone by a longer chain and while
 the possibility of any block being reversed always exists, the
-probability of such an event decreases as time passes until it becomes
+probability of such an event decreases as time passes until it ((("blockchain", "explained", startref="blockchain-explain")))becomes
 infinitesimal.
 
 === Structure of a Block