KeeeX Timestamp Certificate

1SMmA8N5dDjfYULDpBrmYvmUSf9iGRYV9ekfZdV

Anchored on the Bitcoin Blockchain

This document is a static immutable timestamp certificate.

Download: 1SMmA8N5dDjfYULDpBrmYvmUSf9iGRYV9ekfZdV.html

1SMmA8N5dDjfYULDpBrmYvmUSf9iGRYV9ekfZdV
69f4e5c63097d32e429da468a24e87d287fcb1c4b7649605816f1d39cccd50c1
BlockCypher.com Blockchain.info Blocktrail.com
Tue Dec 26 12:00:10 UTC 2017
List of files timestamped in this transaction:
  • xevip-votuf-fumoh-zeneh-tihuh-tenih-horik-rolad-vebog-hunic-fimub-sanel-senep-ponib-dekuz-zedag-zoxyx
    2NPWPq6rFH6VMzMvug8zYUwcJvEpmqq8ip4KJC7
    2017-12-25 17:18:03.0
  • xomel-lozyg-zimys-ropop-vozym-cyfen-kyhuk-corek-nirab-zefyd-ladul-sutop-gubik-vuzas-cumus-pofud-cuxox
    38r5R4BXmCfr1L7PkZeescXgeCyYRbeiFwHSwQV
    2017-12-25 17:24:07.0
  • xopis-piser-dymid-calyf-goryn-dilap-mufir-beguc-musav-kapav-naneb-pebap-kyboh-vetis-rupym-zymim-goxex
    1Abn1Yj3udTKDkZbW7Wt6e4fHuwBHFi4VSVfcnD
    2017-12-25 20:14:54.0
  • xosen-filur-dudot-kilob-bydis-migyn-nicat-vemuh-tudom-kafet-kunod-tosuz-valuh-nukur-hekyn-halog-maxex
    1fcGjQgwawEBPFAEzjpUNfsMU6efGVFy38e8mL4
    2017-12-25 21:37:44.0
  • xibaz-cygek-vekal-zeroc-micol-fugon-rypuc-lyhis-pirud-baluk-gisiz-tusop-dugor-tebek-dugav-fyron-zuxux
    1cCAPbj1KQXCKNcjdpMmFBygT1T2cfc3RFwQYWr
    2017-12-26 09:44:18.0
  • xevip-cutiz-racir-cocar-neryz-lymek-gosez-fezyp-fuzod-nicyc-rymab-vibut-sanyf-cukap-mefif-zalyc-vuxex
    1B7A9V3NHrkNz7XqptMQRoKkMnEEhMj3kY6782n
    2017-12-26 09:44:37.0
  • xufah-havum-namid-zivib-fopun-derin-hivig-ruvez-lebyc-golar-sofov-nepid-gogag-gydev-zopas-lapah-huxox
    3NdzYHkaiKJPUeRz4z3JvkmvLY6YSCSJrjUVQ75
    2017-12-26 09:54:57.0
  • xohed-ditip-riham-netot-makad-cehoz-befum-daduz-gidov-zohah-sycem-damyk-pusat-rubep-sikog-cosog-bexax
    1DXc6gDKaPC5zbL57WDhp6q5SwWAJUkSnGAMw5F
    2017-12-26 11:46:04.0
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.