==== Bitcoin: Guide 1 Blockchain  ====
[[dido:public:ra:xapend:xapend.b_stds:defact:bitcoin:guides| return to Bitcoin Guides]]

=== Overview ===
  : //The block chain provides [[dido:public:ra:xapend:xapend.a_glossary:b:bitcoin|Bitcoin's]] public ledger, an ordered and timestamped record of transactions. This system is used to protect against double spending and modification of previous transaction records.[[https://bitcoin.org/en/blockchain-guide | Blockchain Guide ]]//
=== Introduction ===
  : //Each [[dido:public:ra:xapend:xapend.a_glossary:f:full|full node]] in the Bitcoin network independently stores a block chain containing only blocks validated by that [[dido:public:ra:xapend:xapend.a_glossary:n:node|node]]. When several nodes all have the same blocks in their block chain, they are considered to be in consensus. The [[dido:public:ra:xapend:xapend.a_glossary:v:validation|validation]] rules these nodes follow to maintain consensus are called consensus rules. This section describes many of the consensus rules used by Bitcoin Core.//
=== Topics ===
  * [[https://bitcoin.org/en/blockchain-guide#introduction | Introduction]]
  * [[https://bitcoin.org/en/blockchain-guide#proof-of-work | Proof Of Work (PoW)]]
  * [[https://bitcoin.org/en/blockchain-guide#block-height-and-forking | Block Height And Forking ]]
  * [[https://bitcoin.org/en/blockchain-guide#transaction-data | Transaction Data]]
  * [[https://bitcoin.org/en/blockchain-guide#consensus-rule-changes | Consensus Rule Changes]]
  * [[https://bitcoin.org/en/blockchain-guide#detecting-forks | Detecting Forks]]

<hidden Click to show or hide disclaimer>
|  **BETA**                                                                                                                                                             |
| This documentation uses information provided in [[https://bitcoin.org/en/blockchain-guide| Bitcoin Blockchain Guide ]] and has not been approved by Bitcoin experts.  |
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