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Channel: How the blockchain knows that its been tampered with? - Bitcoin Stack Exchange
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Answer by Johnny Good for How the blockchain knows that its been tampered with?

I think you are referring to consensus..if you try to go back and add something to a prior block and transmit it to the network the other nodes will reject it..

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Answer by Jacob for How the blockchain knows that its been tampered with?

how does a block know that its transactions have tampered with in the first place?It is not the block that knows this; it is the nodes which verify that.To quote the bitcoin whitepaper: When a node...

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Answer by chytrik for How the blockchain knows that its been tampered with?

If I go back to block #1000 and add one more transaction, this will change the hash and it wont be the same one stored in #1001. However, how the hash of block #1000 changes in the first place if it...

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Answer by Osias Jota for How the blockchain knows that its been tampered with?

Hashes don't actually 'change'. When you add a transaction to a block you are creating another block.It's like an author published a book and then next year printed a new edition with an extra comma in...

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How the blockchain knows that its been tampered with?

I know that the transactions stay in the block and hashed alongside few other things and that hash is stored in the next block. And I understand that if you try to tamper with one of the transactions,...

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