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Questions tagged [proof-of-existence]

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Get proof that a transaction was included within a block

I see that the web3 api has the getProof method: https://web3js.readthedocs.io/en/1.0/web3-eth.html#getproof My question is - is there a similar way to get (and verify) a proof that a transaction x ...
1
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1answer
178 views

How to search through blockchain?

I m doing project for document verification using blockchain in which we don't have to carry documents everywhere, hash key of block will fetch data of doc from blockchain.I m not getting how to ...
0
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1answer
351 views

Proof Of Existence (POE) input data first 8 numbers

I am trying to implement POE model based on Ethereum blockchain. Basically, I get sha-256 hash from a document, then I send a 0 ether transaction to myself and add document's hash to the "Data" field. ...
3
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1answer
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Price of storing a hash SHA3 in Ethereum and Bitcoin

I'm involved in a Proof of Existence project and I need to know if it is convenient to create a private blockchain or we can use Bitcoin or Ethereum. I would like to know the price of storing a SHA3 ...