how tampering of data (already added block's data) in blockchain or worldstate is detected in blockchain and hyperledger fabric?

how tampering of data (already added block's data) in blockchain or worldstate is detected in blockchain and hyperledger fabric?

I have a couple of question regarding the tamper proof mechanism of the blockchain.

I have a couple of question regarding the tamper proof mechanism of the blockchain.

1) My understanding: I understood that hash of [ hash the previous block + content of current block ] will go as a hash to the next block. if we tamper content of a block the hash will change and the link to the next block will be broken.

My Question: If a suspect changed the content of a block long after the block got added, will the calculation of hash and placing the hash in the next block happens automatically ?. Suppose if some one has already illegally changed the content and the link is broken, is there an automatic mechanism to trigger the event that the link has been broken ?. At what time the tampered copy of blockchain will be identified and invalidated ?

2) My understanding: In Hyperledger fabric I uderstood that ledger = blockchain + worldstate. The world state is calculated based on the blockchain. The application will depend on worldstate values, the applications will not traverse through blockchain to find a value.

My questions are: i) how frequetly the worldstate is recalculated ?

ii) will a broken chain(in case of a tamper) is detected while re-calculating the worldstate

iii) what if a suspect tampers the worldstate on a peer. how this situation is set right ? will the tampering be detected during the consensus or any other acticity ?

I read and understood that the blockchain is tamper proof, but really want to understand which processes safe guard the BC ?

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