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Let's say that someone sends me some ETH. How can I prove to a third party that I am the actual recipient of that transaction? The third party is anyone with access to the blockchain. In other words, I want to send some data to this third party that allows it to verify that I am the recipient of a specific transaction on the blockchain.

  • This question needs a lot more detail. Who needs to prove? What is the proof method? (ie. address, hash, etc.) Is the third-party a contract? – ReyHaynes Feb 9 '18 at 17:28
  • @ReyHaynes added details – David Feb 9 '18 at 17:38
  • Why can't you just send a transaction from the same address which received the original transaction? – Lauri Peltonen Feb 9 '18 at 17:50
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You could sign a message hash using the private key of the account that received the transaction. ecrecover can be used to verify the signature was generated from that account.

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