Proof of Existence

Proof of Existence is an online service that verifies the existence of computer files as of a specific time via timestamped transactions in the bitcoin blockchain.[1][2][3][4]

It was launched in 2013 as an open source project. It was developed by Manuel Araoz and Esteban Ordano.[5]

Reception

On May 24, 2013 reporter Jeremy Kirk from IDG News Service wrote that "It's essentially a notary public service on the Internet, an inexpensive way of using Bitcoin's distributed computing power to allow people to verify that a document existed at a certain point in time."[2] On April 22, 2014 reporter Rob Wile from Business Insider wrote that it is "Perhaps the most straightforward example of a post-Bitcoin service using Satoshi's blockchain".[6] On May 8, 2014 reporter Daniel Cawrey from CoinDesk wrote that the service "is an example of how the power of this new technology can have applications far beyond the world of finance, in this case, giving a glimpse of how bitcoin could one day have a substantial impact in the fields of intellectual property and law."[1] In her 2015 book Blockchain: Blueprint for a New Economy from O'Reilly Media, author Melanie Swan wrote it was "One of the first services to offer blockchain attestation".[3]

Service

The service enters a sha256 cryptographic hash of a document into the blockchain.

The service costs 0.005 bitcoins per use. The service creates an unspendable transaction.

References

  1. 1 2 Daniel Cawrey (May 8, 2014). "Bitcoin's Technology Could Revolutionize Intellectual Property Rights". CoinDesk.
  2. 1 2 Jeremy Kirk (May 24, 2013). "Could the Bitcoin network be used as an ultrasecure notary service?". IDG News Service via Computerworld.
  3. 1 2 Melanie Swan (2015). "Blockchain: Blueprint for a New Economy". O'Reilly Media. pp. 38–39.
  4. ↑ Ram (February 2, 2015). "Anonymous Proof Of Existence - Bitcoin Tech". newsbtc.com.
  5. ↑ https://proofofexistence.com/about
  6. ↑ Rob Wile (April 22, 2014). "SATOSHI'S REVOLUTION: How The Creator Of Bitcoin May Have Stumbled Onto Something Much, Much Bigger". Business Insider.

External links

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