KeeeX Timestamp Certificate

3aP4oLbX9hJ1bJKyCn21nQrAyNjYDG1zx6D54DH

Anchored on the Bitcoin Blockchain

This document is a static immutable timestamp certificate.

Download: 3aP4oLbX9hJ1bJKyCn21nQrAyNjYDG1zx6D54DH.html

3aP4oLbX9hJ1bJKyCn21nQrAyNjYDG1zx6D54DH
8dab9ca3494a6fa176dc449431b1d4a26e9128f3a5353293cc0abb3eb20704e4
BlockCypher.com Blockchain.info Blocktrail.com
Tue Apr 17 00:00:01 UTC 2018
List of files timestamped in this transaction:
  • xebeb-tocan-fycyz-nunuv-hupeh-necep-lerah-zazag-bifov-rymal-zadas-pykak-fivuk-nikun-sizyr-pogat-cyxyx
    3JPXXgmT2p85fSoAfrRNbhBFS3hg5S7JtxsLxwY
    2018-04-16 12:46:08.0
  • xepob-sonib-nohod-hunik-hodyt-rasug-gavam-kikyn-pafos-ryluk-rimuc-roced-detir-rapor-votub-zizen-cexox
    1k522BTJ9sueJfMNWo1UDRDQj9ok3pVqeDyddgN
    2018-04-16 12:46:16.0
  • xopec-pikug-luseh-difih-noris-dolar-lahyd-lynih-typyr-luked-heryn-rosub-nyhab-zonev-debup-dosof-zuxex
    1CwA4kMFAa945p1sXLiyCs9V9x2ZL1BQZ3fiiDd
    2018-04-16 12:46:21.0
  • xesez-foryh-tases-hupak-maguk-pyleh-myved-limit-gupem-pakuz-morog-zuzef-sikil-dypot-fihot-sivaf-nuxix
    17i8kU5Bd9PcwPohoVserswkyuygV98k1Jt2LjP
    2018-04-16 12:46:35.0
  • xuteg-labar-madyc-tifac-binuh-nezul-pinot-zafer-fupyr-mebyk-mibum-dofob-vocyv-vovef-gocug-sicab-guxux
    1JVAxdk9rFDRzrqtkRBpy6CYX9Vhi3euPeNPk1Y
    2018-04-16 12:46:47.0
  • xikob-ceher-raper-numip-rurat-nemeb-godih-banyz-sekyh-byfon-becur-basop-rofud-gekym-cymyk-vizok-maxex
    1TBt1WgeLRhPojg6H1b1PEWy1YrjHGv3Wpfp3FX
    2018-04-16 12:46:57.0
  • xidoz-kuvyt-goves-mefor-vovyb-nonef-hysog-kilal-fanyf-zusul-lonid-dyseb-febyg-kokor-ruhys-vebyf-kaxex
    2018-04-16 13:08:22.0
  • xulip-typar-rynan-vekym-zevap-dafes-zubuh-cigoz-vitym-vykum-lotis-kaceg-davod-sizip-lagad-hezik-caxix
    3aeFf7DLNduYM1gLDoeKh7mx9UiFo193bhV9dsY
    2018-04-16 13:39:08.0
  • xugit-fodym-letyd-kulul-cykyb-hinep-kypok-reboz-casuc-mipak-ryfim-vapid-bivod-deciv-gezet-bedug-myxix
    3WkAMeDuvDqedbCVwjsE9tUbWFBRHVP933FBpdu
    2018-04-16 15:16:14.0
  • xogil-visir-nunyp-lufog-tobyf-pirab-fudop-hotol-nimyl-tosak-mahup-nakiv-zusuh-fihil-petyh-miseb-buxix
    14TaLXUYqMtXjmgxyKtVrkWGkiufr2fAjKC796r
    2018-04-16 15:16:18.0
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.