KeeeX Timestamp Certificate

2chSU6MU6TdQNr91UzZv7J4WxvAwFNM22AnMeQV

Anchored on the Bitcoin Blockchain

This document is a static immutable timestamp certificate.

Download: 2chSU6MU6TdQNr91UzZv7J4WxvAwFNM22AnMeQV.html

2chSU6MU6TdQNr91UzZv7J4WxvAwFNM22AnMeQV
37203e55dbc9db7c5020aa8eb6422240bbd24652e4ce15b6823a0b404e379853
BlockCypher.com Blockchain.info Blocktrail.com
Wed Apr 18 12:00:01 UTC 2018
List of files timestamped in this transaction:
  • ximob-rehyp-ricum-vakot-ragam-lirys-binyk-pypup-mabil-kocis-tinuk-calug-soryt-fymup-ronis-husos-vaxyx
    35hRBBGDe57N4i92jNh9i5qY2VPjhFrVzK7JUc4
    2018-04-18 09:10:25.0
  • xicog-tatek-hofen-dizas-fihuv-gebuz-bemek-byvum-fumoc-bumyr-babyk-vezyh-baser-pohab-nuzor-luton-saxex
    3EGezxg2st2wmzZ6DzGH8oD9kegGjL1tU7bXym6
    2018-04-18 09:11:53.0
  • xecid-himyg-modyk-nohas-roner-puzul-kulyn-gehop-dubab-vilat-motas-sikuh-kamas-fesuf-todiz-sehev-luxyx
    2018-04-18 09:51:49.0
  • xehab-pisig-sagun-dukas-nyhek-lytul-rymof-bofim-radef-cypok-pesem-lepad-gamec-cadah-sepeg-genad-muxex
    2018-04-18 10:15:59.0
  • xomad-gydev-gumir-zubik-bovym-tureh-cidom-favit-pupif-sokat-ragup-vadyd-denyr-somik-rymad-totim-nexix
    12cJKEFvkyfExjWqH4VteqBEnddnBnW3sLxbUJM
    2018-04-18 11:45:45.0
  • xucek-rokuz-kagik-pykys-temar-zamuc-somor-tymor-colem-nuceh-hepom-veric-hofud-digeg-renys-besun-texux
    2jV4uWZre89xJKmcp6j7wvryZjuHCnbBERrWPLN
    2018-04-18 11:46:01.0
  • xofes-pinig-motep-cypad-bopyf-nyror-bapyp-kydyh-sifar-temes-sulip-fekit-cakak-gaser-bepek-sogub-nuxux
    2mQymwummo7HNrGjxpxc2SYxGmotgYfLFwGVJQX
    2018-04-18 11:47:11.0
  • xidef-faded-niror-mevas-gizof-ryfel-cades-zucot-cefek-nybug-bykyh-fubyn-nekuc-kanos-lycyf-zonam-fexix
    2LmqfHpbtXBhKgrS3UhbdkCgeRyPnQ8xif2uoR8
    2018-04-18 11:48:34.0
Technical Explanations

This certificate mentions file identifiers (also known as KeeeX 'idx') that are computed from sha256 hashes that cannot under the current state of technology be counterfeited. No two distinct files can share the same identifier.

The KeeeX server produces a certificate summary like this one every several hours. This timestamp certificate may hence adequately seen as a kind of sidechain, that prevents from pushing too many transactions on the Bitcoin blockchain. It also mutualizes the cost of timestamping of course, which allows KeeeX to provide this as an unlimited service.

This certificate displays at the top below its own b58 encoded identifier computed from an sha224 hash. These settings produce a 39 character string that fits within the current 80 byte Bitcoin blockchain limit. Again, under the current state of the technology, it is not possible to counterfeit this identifier by producing another certificate file with the same id.

This certificate's id has been registered as OP_RETURN data on the Bitcoin transaction above that can for your convenience be verified by following the links below. The present certificate file hence creates a proof chain from the Bitcoin blockchain ledger to your file, that provides evidence that at the transaction date you had knowledge of the identifier of your file, which you may or not have decided to keep private or share publicly. This idx does not by itself expose your data in any way. By using KeeeX, you also have a chance to digitally sign your original file.

Although KeeeX will make its best efforts to keep this certificate accessible and indexable by search engines, we cannot guarantee this. If some file identifiers are of interest to you it is thus your responsibility and interest to download it and make sure to preserve it indefinitely. Once downloaded, you may verify its integrity using the KeeeX app. Depending upon its version, the KeeeX app may automatically retrieve this file on your behalf.

You may wonder why we chose to mutualise this certificate for potentially a large number of files. The reason is that a single certificate may provide a proof of existence for an unlimited number of files and no blockchain, Bitcoin inclusive, is designed to satisfy the massive notarisation needs, since both the block size and rate are constrained.