nowfound

Alternatives

Products that do what Btfy – a blockchain that uses weather observations does

Hi HN, I built Btfy, an experimental blockchain that uses weather observations as a source of unpredictability for consensus The motivation is simple. Proof of Work generates uncertainty by performing computations. I wanted to explore whether we could obtain some of that uncertainty from the real world instead. Btfy combines weather observation data with a Verifiable Delay Function (VDF): Weather Observation Data -> VDF -> Block -> Hash Chain In the current implementation, observation data is collected from multiple locations, a VDF is computed, and the result is used to generate a block.…

  1. 1BT
  2. 2MA
  3. 3
    Bitproof113

    True certification in the bitcoin blockchain

    2015

  4. 4
    Lark117

    1st crypto app that correlates news to price in real time.

    2017

  5. 5BB
  6. 6
    Dawn2

    A Blockchain Secured by Weather Observations.

    Jun 2026 · github.com

  7. 7

    The scalable blockchain database.

    2016

  8. 8

    Prove that you said things before anyone else

    Jun 2026 · yousaidthat.org

  9. 9
    Sia159

    Decentralized storage on the blockchain

    2017

  10. 10
    TimeSeal116

    Restoring digital trust, one blockchain timestamp at a time

    2023

  11. 11
    Woleet73

    Bitcoin-anchored proof that documents are authentic

    May 2026

  12. 12
    Streams106

    Real-time blockchain data streaming made simple

    2024

  13. 13

    Using blockchain to prove time travel

    2018

  14. 14SR
  15. 15
    YOLOREKT116

    Short-term prediction market platform built on blockchain

    2022

  16. 16LB

    I built this over the weekend. Any feedback is appreciated. Please note you will need a WebGL enabled browser. Thank you for checking it out. --UPDATE-- HN Traffic is strangling earthbit. There is sporadic downtime due to the web services I am using, if no transactions appear after a few seconds, then please try again in an hour.

    2013 · earthbit.net

  17. 17BA
  18. 18II
  19. 19EC

    2017 · ethereumcanvas.com

  20. 20ME
  21. 21CP
  22. 22DB
  23. 23EV

    2021 · etherlearn.cryptizens.io

  24. 24

    The only blockchain calculator you'll ever need

    2025

Ranked by how close each launch is in meaning, then by votes. Refine with a description →