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  2. Decentralized Trusted Timestamping using the Crypto Currency Bitcoin

  3. https://tzstamp.io/

  4. Script: Reduce OP_RETURN Standard Relay Bytes to 40 #3737; Gavin Andresen Merged 1 Commit into Bitcoin:master from Jgarzik:op-Return-Size on February 26, 2014

  5. Change the Default Maximum OP_RETURN Size to 80 Bytes

  6. Git Hooks

  7. Extended Verification for Git Tags

  8. Difficulties of Timestamping Archived Web Pages

  9. Electrum Bitcoin Wallet

  10. Tool for Converting Bitcoin Keys and Addresses

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  12. https://news.ycombinator.com/item?id=10667335

  13. Drand: 🎲 A Distributed Randomness Beacon Daemon (Go Implementation)

  14. OpenTimestamps: Scalable, Trust-Minimized, Distributed Timestamping With Bitcoin

  15. How OpenTimestamps 'Carbon Dated' (Almost) The Entire Internet With One Bitcoin Transaction

  16. DEVCON1: Universal Hash Time

  17. Custos Startup Uses Bitcoin Bounties to Make Pirates Rat on One Another

  18. Wikipedia Bibliography:

    1. Trusted timestamping

    2. Cryptographic hash function

    3. SHA-2

    4. Bitcoin

    5. Version control

    6. SHA-1