This document is a static immutable timestamp certificate.

Download: 1566ruLZpJoGykGVfYNGzsL7yfSvAXYVBsByvMa.html

1566ruLZpJoGykGVfYNGzsL7yfSvAXYVBsByvMa.html
c47d95b12c459cb10937ac1c6f4770d9e227fabf79cf75a6fa9be04119988ff5
BlockCypher.com Blockchain.info Blockexplorer.com
2019-04-11T00:00:01Z

List of files timestamped in this transaction:

  1. xenic-tamop-refas-nigyf-zizur-fodan-futib-ponos-kivac-romyb-fosus-badyh-rarag-typob-zugon-hipof-pexyx
    2019-04-10 12:19:07.0
  2. xubol-cubib-hegyb-bonag-gukom-byrup-pisis-kubem-codyd-nekem-rafom-reheg-gyret-fizoc-piret-hivet-gyxox
    2019-04-10 12:19:51.0
  3. xilir-hugon-hotun-sagov-mumyk-zydag-sydib-gubud-nubyk-nygaf-gisit-fytuk-vypyh-megyv-potar-derez-tixox
    2019-04-10 12:20:59.0
  4. xiloc-mumod-nyfar-rokoc-lylib-vituv-rafin-todib-pecig-kahop-dahom-tudec-rulut-pigiz-hekyn-fusip-texux
    2019-04-10 12:21:56.0
  5. xufig-veryn-motiz-vuzah-gyguz-zimot-rodur-pukoh-pymap-hohig-huzil-marad-bybet-nukif-sotaz-gukuf-huxyx
    2019-04-10 12:22:35.0
  6. xezem-konyp-nesaz-nesod-bahev-kubig-coraf-mavem-dabal-fazym-habyd-rorag-koveg-bituf-cunol-fyhek-vuxax
    2019-04-10 12:23:29.0
  7. xopac-lepyb-bodeb-vybyn-tizyn-feneb-siben-titah-mamut-rehec-nufof-gibys-tudik-pohyb-vigan-sufah-buxax
    2019-04-10 12:24:23.0
  8. xebad-kedib-toves-sehes-rilyh-kinif-zerus-rebyf-zylac-kozub-nenum-muzom-hasov-cobaz-cymaz-leleg-rexax
    2019-04-10 12:24:50.0
  9. xukek-sehuz-pinip-rikib-bovus-rytuc-zadil-faduv-citar-teryg-lutyn-bapil-behyr-dypob-hozyz-lucob-baxyx
    2019-04-10 12:54:36.0
  10. xevod-savib-gudal-sadod-bedyp-bizal-hinuc-nidyf-zipaz-cucyl-nyhig-gubyh-minec-vesav-nazyh-dagyr-suxyx
    2019-04-10 12:54:59.0
  11. xokod-basev-pohag-runat-cedeg-vadum-maheg-conip-tynoc-gotoc-bifyl-leruh-cybuk-sylan-pyhit-mozuz-zexyx
    2019-04-10 12:55:19.0
  12. xolem-nynup-parog-parof-tomil-geryp-vinar-cymyn-somof-hyved-pokoz-zihyp-hogef-zamov-cudok-buvem-fuxyx
    2019-04-10 12:55:47.0
  13. xecad-pokiv-gycyh-kilit-pumiz-gubod-bemug-repyl-fubam-dober-pekiz-lilez-terad-bibeg-firos-rihol-haxux
    2019-04-10 12:56:31.0
  14. xuris-bafys-lahec-pafyv-cuniz-movuh-himer-refoc-mocub-hegoh-busyc-voryb-vedal-byhiz-kylod-bivor-gixix
    2019-04-10 12:56:55.0
  15. xodis-cavip-sobob-holul-gikic-tepez-holuk-ligid-teker-telyl-pebuf-kogot-zitak-bozyb-kenyz-luvem-noxax
    2019-04-10 12:57:22.0
  16. xugor-susil-pimum-rygin-vopof-letag-hetas-sysez-bibol-fefad-rituv-tibos-salez-bonaf-sinek-cozen-lyxax
    2019-04-10 12:57:59.0
  17. xefaz-pusur-tohav-gefyv-semun-falan-dadav-lidyp-zyvir-copef-mubav-bokip-reseg-kubok-mogof-lopyp-coxux
    3KJdCyubMdGKqohwtG1As6vZkJpo6bCpZePweFK
    2019-04-10 13:09:36.0
  18. xuhad-pepoh-liryd-tosyk-susod-kokid-ditid-podid-vihid-cebyd-pypic-horen-bekon-tohuh-humaz-cocan-gexux
    2019-04-10 13:30:00.0
  19. xogoc-dorer-miviv-zilat-kykak-raluf-cetal-ricyp-vinin-kehol-novyg-rozem-cygen-pasas-mysen-biryn-guxix
    2019-04-10 13:30:13.0
  20. xebed-pofyn-ruhyz-pezic-cuzoz-dahyd-zoret-hinyt-divyt-radok-necef-minuc-gunac-vituv-loved-lezid-voxyx
    2019-04-10 13:30:27.0
  21. xicad-zanuh-giref-cilyp-vagih-fivup-hugov-holaf-vuduf-sapov-vumas-kapet-mevot-vyhep-cegis-tynoz-duxyx
    2019-04-10 14:03:21.0
  22. xevek-duzec-mysin-begen-vitil-kifyz-zynab-mavet-matic-myveh-medak-nuduk-muhet-tizap-zusov-vesud-syxax
    2019-04-10 14:04:16.0
  23. xetel-vehyt-tupim-konef-nubam-lival-ginys-mazir-vutyt-kazuh-lanak-fumav-hapym-cemoh-zatoz-pefig-vuxax
    2019-04-10 14:05:19.0
  24. xirot-fapob-vutuv-bypes-ceror-byfyv-peziv-duvab-velud-nugyp-tyzeh-mygec-zenyg-kirak-hakec-cifak-luxyx
    2019-04-10 14:06:11.0
  25. xefic-tazup-pyfyf-bypyp-cefyl-cibum-zohit-cemas-tirok-dokyg-rovim-gigyk-ravuv-sepon-kamus-degef-noxux
    2019-04-10 14:07:07.0
  26. xikih-pysih-nizis-tihod-divaz-gusat-gubid-mekap-zumyd-dutug-hinir-cynik-fobop-hemib-fapyp-cypod-gixax
    2019-04-10 14:07:44.0
  27. xuvas-pedyv-bozaf-nebyg-vyrad-hyton-luzoz-levuh-fovut-cohaz-cagod-vepad-selal-fuban-sedal-liril-koxax
    2019-04-10 14:08:38.0
  28. xibid-rotod-vadyp-zemez-cycop-kopyp-fizah-vylid-sofab-zidoh-dacuh-sehun-micyn-porid-farev-vidyr-zuxox
    2019-04-10 14:09:32.0
  29. xunip-funiv-hehum-mymep-pokoh-pusys-zyryg-gydod-tymip-boryv-gyfoc-nicif-cemor-bysec-vymeh-nozil-puxax
    2019-04-10 14:09:46.0
  30. xorip-lucad-cepip-gefuk-dadat-nydyl-tytil-tusin-ribih-hiroc-kalag-senyf-zepot-gimyz-giliv-zesyd-duxox
    2019-04-10 14:10:36.0
  31. xehik-zefyl-vafog-fakyr-fyvyf-rafoh-dihum-rylym-kezic-nyfan-susym-nulyl-macum-sudiz-gasis-kykun-toxix
    2019-04-10 15:11:43.0
  32. xohac-pytub-tukam-sycoc-sepak-vyfak-latut-fikom-nomav-funen-dosov-kucif-kefyl-dezyr-bonan-huver-luxex
    2019-04-10 15:13:02.0
  33. xukar-vulud-zopyb-sibyz-vugih-myliv-vugyg-gocar-nalyb-gohiz-busyr-tisuc-hikuf-bivyd-vofav-sykur-guxux
    2019-04-10 15:13:54.0
  34. xoper-patuf-rezes-nocac-ryhas-hybad-sypeg-virac-gezan-dohut-vemev-nonyz-funyd-difus-komum-zysec-zoxux
    2019-04-10 15:14:54.0
  35. xenab-rukud-cizur-paraf-homif-vomoz-rudid-novob-lumon-kabok-lekur-sasun-rikan-zykil-tanih-livus-tixyx
    2019-04-10 15:15:31.0
  36. xikaf-rugyv-hycyd-zyfoh-lenak-hylyt-vemyl-guker-cypet-dukyf-toneb-lucuz-syvor-puzih-gytos-sokoc-haxex
    2019-04-10 15:16:05.0
  37. xihag-myzin-muguf-zimim-pivob-pufir-zidus-suboc-pypak-mokym-cazep-myzig-pevef-lulat-punup-menim-laxax
    2019-04-10 15:17:15.0
  38. xopih-nidyf-lefok-cezil-pypol-tipyk-mehif-zofan-macyt-dihoz-zahot-lifom-futuc-kymav-cynuz-bunuh-cyxix
    2019-04-10 15:18:25.0
  39. xovip-fapib-gypav-rocef-kikaf-bihyr-livir-ciceg-fapol-fyrur-vytyk-nesug-lesev-zamyr-teneh-cotir-mexux
    2019-04-10 15:36:35.0
  40. xiref-mymyb-sogos-ticos-bokug-retic-pipuz-lydev-vibir-gyget-vyrob-carus-kucor-fovym-haheh-tomyh-pixix
    2019-04-10 15:37:10.0
  41. xenon-budyr-dekud-zodum-curiv-vypyh-vytuf-sezof-vibyg-vibov-puvyh-kodyz-gihed-culiz-sigaf-murek-moxyx
    2019-04-10 16:06:09.0
  42. xirib-tubec-heceg-lipon-gonic-rapyl-pihyh-kyvor-midin-lyces-cedas-melal-zubur-cesid-fytur-hudub-dixex
    2019-04-10 16:06:15.0
  43. xutic-fidoz-dasyg-golen-magid-rezaz-kefoz-korum-vudes-gunyf-semek-fovir-nisoz-hyhef-cusyh-kidan-laxox
    2019-04-10 16:07:40.0
  44. xecoz-fusib-fyhop-vybac-mynof-zenuz-mecik-nuted-zenam-sunis-rymut-visyb-lufid-ravim-dyhym-marib-hyxix
    2019-04-10 16:08:52.0
  45. xetef-rytef-nuhub-tizig-cysar-dumil-hedyb-masec-hodam-zavan-degec-fodoz-segym-cicud-pohih-dylan-buxax
    2019-04-10 16:09:36.0
  46. xudih-fozyt-pytav-gabog-minus-mibek-zaser-pikil-serul-cuduf-pypim-gysip-tavov-gyken-ratar-mesur-cexax
    2019-04-10 16:11:05.0
  47. xofas-vonot-kateb-tetir-lanit-lazet-myzut-locut-hutoc-punug-nehit-donyn-nedib-vedym-kobaz-vezeg-loxix
    2019-04-10 16:21:12.0
  48. xidis-rofil-bifuc-hahok-tosok-saput-bikuv-vimer-bapep-vepok-lemap-nyfef-radut-zofub-hihot-sigeh-tyxox
    2019-04-10 16:21:19.0
  49. xuhak-cycen-migen-tucyg-pybim-pocyr-fobiv-hyfoc-henub-teter-retyd-rovut-lufad-kezes-basof-dicip-nexax
    2019-04-10 16:24:13.0
  50. xunep-hafem-derac-cagit-hycam-hifek-vohon-tohet-tifel-folor-ruzyp-zorez-rarez-nuluz-gukyv-novug-zaxox
    2019-04-10 16:46:45.0
  51. xupor-pivev-zegot-homuf-mavim-bires-cebat-bocet-kufud-rizyv-vonoz-kacem-tetuv-mutor-zeluv-rokez-vuxox
    2019-04-10 16:47:16.0
  52. xepoh-fadyt-sicud-monyz-cehim-kagez-fohoc-rabas-kolun-tecir-bosat-muzob-kyfid-cabup-lavyr-vysod-noxux
    2019-04-10 16:48:08.0
  53. xotev-fakor-gasuh-lasud-sugah-zytev-lurof-gutab-bocet-disup-fikef-zucah-vidot-himyc-pafir-bohun-kyxux
    2019-04-10 16:48:43.0
  54. xesez-bonuf-filur-heseg-dipot-fyvas-bofuf-mitas-ruryn-kupem-gunog-nykeb-napyf-setan-zumak-rysuz-vexax
    2019-04-10 16:49:28.0
  55. xopah-hemuk-mepyb-cilyf-kubep-hanyr-benav-bylyd-nymen-hetep-mumez-catul-numar-lemil-nymos-figeh-luxyx
    2019-04-10 16:50:42.0
  56. xekap-tedyt-tysyb-radam-hunop-facyh-dekon-comyl-hosiz-godyf-ganyv-salyf-lodog-cabef-pomec-vozet-zaxyx
    2019-04-10 16:51:50.0
  57. xelil-kagiz-sycen-fiper-kudaz-bulik-vosab-kesaz-suvam-husoh-conoc-mocyh-komoh-vevah-honir-nipum-nuxex
    2019-04-10 17:24:11.0
  58. xuzih-fopac-sabeb-rized-nemov-hiled-rufik-korif-hadif-zigyg-lisys-ficuf-zolyp-lired-bubak-kunur-vaxox
    2019-04-10 17:24:51.0
  59. xecof-sohip-nusyr-zecom-kimyz-vobib-pymiv-patir-dyzid-fykep-letiz-bygaf-naras-fuzov-monuh-tanud-lyxox
    2019-04-10 17:25:50.0
  60. xugir-hofig-tifis-buzen-vebib-kidav-nufah-valub-vyzug-puniv-myvil-mazah-libov-dykoh-hetad-nemyv-pyxax
    2019-04-10 17:27:01.0
  61. xevom-fakom-kupop-kucug-filal-myzer-vylyh-letuc-gulid-rikak-vekuc-huzic-pyvel-fumeg-bamar-pocig-pixex
    2019-04-10 17:27:36.0
  62. xitib-tyhyl-lulup-nahuv-borom-bifot-typaz-hofif-sytir-pytek-bolur-vykag-roral-ratab-zavid-regav-tyxox
    2019-04-10 18:01:21.0
  63. xudef-kycan-polit-kedyb-gazaz-samob-vuhok-kepek-nukyc-zahyn-cutof-fenyn-dasyn-cuvad-lefyp-cabyc-zexax
    2019-04-10 18:02:24.0
  64. xehan-zekyg-tusyh-ryhus-bumed-humil-magoc-music-dahaf-sacup-rumim-hidup-gyvog-cinak-hobur-tivib-saxox
    2019-04-10 18:03:20.0
  65. xupif-pyvib-gidub-gytop-meloh-dabat-zibob-mohak-vufum-perok-vefen-sapyr-falap-myriz-vefev-hicoc-lexax
    2019-04-10 18:36:50.0
  66. xugik-nocev-ronun-nihyv-kymaz-kilag-reryv-cobav-socuv-fybyv-gadir-lazos-sefob-levyt-pytec-gofep-vyxax
    2019-04-10 18:37:54.0
  67. xufab-zibop-minog-gohen-pemav-rupoh-budok-rytib-vifyv-gysiv-pabir-mezor-haban-divyv-fusuz-fugol-vixix
    2019-04-10 19:02:24.0
  68. xefav-hobyt-nilad-nufuv-vyfeg-macap-figyt-nubog-vyhab-cysem-fevin-cihic-sukam-sukeg-zecad-pagys-lyxyx
    2019-04-10 19:03:29.0
  69. xedaz-bupuz-bezas-vasiv-sytyd-rabym-panys-napog-huvum-nehat-gakit-mibep-zafin-dipah-tutuk-dilun-bixix
    2019-04-10 19:04:30.0
  70. xopih-dyzic-bakid-nekuc-lodyn-porar-patic-nomek-nedez-demab-tigog-lemap-zunyd-votov-mebor-dygaf-doxox
    2019-04-10 19:05:30.0
  71. xubos-pidun-zoror-rahet-serez-tylyk-visil-curak-harec-pavec-kymuf-bybav-typan-nobyt-hihic-soryh-tuxix
    2019-04-10 19:06:39.0
  72. xicab-zynyd-gonur-sacas-varok-lusep-zisel-dakof-hirop-solak-cokul-socip-hapob-cesyg-dalan-rulev-cuxax
    2019-04-10 19:37:19.0
  73. xuham-cubyh-cyped-bageb-cemov-tovop-nafyb-duliv-tumus-motur-cyzuz-zucos-sohup-rofyz-fisit-bycet-sixix
    2019-04-10 19:37:55.0
  74. xumod-lelot-hedod-tyhuf-cyzem-vabur-roges-zegan-sabav-bocuh-rifek-bedur-gydic-mykok-duteb-namas-zexux
    2019-04-10 19:38:06.0
  75. xicen-sotit-rivyc-kavek-kuhak-lyzos-zobuz-kafut-budum-borem-rysid-rohop-konot-fafun-dasot-vukyk-nyxyx
    2019-04-10 19:38:22.0
  76. xozim-zyrot-lyhar-tylyh-mibih-bufam-fadek-zutaz-lesic-luvyr-vazyc-sahaz-pezeg-kogav-berug-redaz-sexix
    2019-04-10 19:39:00.0
  77. xicis-gomup-fitur-birip-vopyg-fapoz-budak-nyvig-kuvoh-focut-givig-fodyh-ruteb-vukih-sacam-mukit-caxax
    2019-04-10 19:39:25.0
  78. xoter-kyfig-gebag-gyhyk-lezuk-zomeg-tidec-pymup-bepan-mymor-dosaz-fekem-zipur-hafyh-cyhom-tygon-cyxox
    2019-04-10 20:08:06.0
  79. xizik-kabog-nociz-hipiv-rybag-bigob-vazot-cosoz-rabot-sivyg-nusuf-farin-rihod-pyhys-lover-fefep-gaxux
    2019-04-10 20:08:38.0
  80. xohep-bobyn-vohas-pikeb-vopym-gikac-bimyg-rehas-vemuk-nepot-sirof-myhob-hobah-bynyc-lydov-tydet-kexax
    2019-04-10 20:45:44.0
  81. xeden-siceg-vuril-pipor-fapok-ludul-tobac-rutyr-lugit-tyvaz-metyl-kosur-dunum-belym-bahet-tylak-guxox
    2019-04-10 20:46:35.0
  82. xonaf-pihup-zimil-mytob-golyv-cilol-pifit-nugur-fozum-foduz-sokys-nehen-kihid-tyzyk-kinar-fipep-laxax
    2019-04-10 20:47:46.0
  83. xevek-cudin-fyrus-radel-bicah-defin-lyrol-maked-hilih-kenos-livyv-lasyg-zikoz-gikab-fukam-cihuz-vyxex
    2019-04-10 20:48:46.0
  84. xofos-kuruc-lilab-luzok-rifef-figok-zykyd-taryg-kysur-dudib-mykap-mezat-zoful-vygub-vobuk-botez-sixax
    2019-04-10 20:50:05.0
  85. xusap-dytug-babam-bolun-becid-zamyg-sifud-bariv-ryset-sylov-getob-tilyb-negyk-tykes-mituv-pusel-dixyx
    2019-04-10 20:50:49.0
  86. xevok-gikor-rofob-zates-revyv-dadiv-domip-bobih-cakyf-kucys-lomoc-dadeh-fidaz-vedab-tomud-koluk-nuxax
    2019-04-10 20:51:57.0
  87. xutez-romek-pirys-panyd-rymec-zinul-muduh-birom-kymar-rahot-mokal-sutak-tibyd-sipyv-higob-tonov-boxix
    2019-04-10 21:32:11.0
  88. xiril-puvak-babeh-rymep-ryzas-pafes-nanop-sicup-fycez-byzeg-remuf-nader-runyr-refat-dyfal-firuk-luxax
    2019-04-10 22:08:30.0
  89. xehev-cydom-cipam-setep-vobek-hofug-cebak-firuh-fizic-bemed-talac-vytam-zakyc-purah-nuhod-kizyt-fuxix
    2019-04-10 22:10:09.0
  90. xomez-hazod-pykap-dypum-ciruf-lucyr-vacyh-fosup-movac-lurad-sufuh-buloz-gopuf-bugys-pyceh-zamar-bixex
    2019-04-10 22:11:35.0
  91. ximac-ziber-covad-copig-pahes-dilob-kopil-sysah-celer-botad-vahot-kycuc-malyn-giheb-zugyt-nuros-pyxax
    2019-04-10 22:13:09.0
  92. xihoc-sikid-kekip-fifok-mucyt-gezur-mynym-rehuf-huvyh-zudul-memyg-nycol-geniz-fodoz-betad-micyg-pixix
    2019-04-10 22:14:11.0
  93. xikan-vymyb-sider-benyl-hyfis-biduz-kikaf-zahyl-madur-gizyl-pekig-cihal-cepam-gyvic-kabub-sucag-voxix
    2019-04-10 22:15:35.0
  94. xuvel-bobez-kodof-zabir-danor-zihub-fuvel-sahyt-bukas-kygam-gabik-tafem-garyv-takik-bizyr-kihah-gexex
    2019-04-10 22:59:37.0
  95. xodel-kudir-zyvob-somob-dedab-runum-dipal-ryviv-zihed-kafas-lydyn-lavyh-dyryh-silof-kezum-kupiz-ruxox
    2019-04-10 23:01:12.0
  96. xutav-ragep-hocyp-ligar-gipel-bekih-tydun-pelas-sykac-cekah-tufym-lakez-behek-vifeb-zygyv-husun-lixax
    2019-04-10 23:02:30.0
  97. xutas-sokis-ciziv-lanyb-futat-budes-tasah-vesip-bicak-donig-hofep-zataz-sabob-hycar-sebul-hocuz-dixox
    2019-04-10 23:03:28.0
  98. xoken-cubaz-detet-lozuz-resyn-zelom-patun-letef-nebih-colyc-homar-tupop-makac-gyrud-huhan-zyhih-roxux
    2019-04-10 23:04:40.0
  99. ximik-becip-lydud-gecun-nyhuh-nifol-hozeb-vubut-nicer-tyzyg-gesym-caset-tusid-pokav-pyciv-vyvyn-loxyx
    2019-04-10 23:05:36.0
  100. xovak-lysyb-cuhep-dahib-bilec-zelup-vopov-tefoh-hunac-nizym-gefyb-kizyc-cyvah-vymaf-poduk-vysud-nuxax
    2019-04-10 23:06:22.0
  101. xosak-negem-cyrur-zydep-zufyk-gymuk-retir-razos-cuvyr-rucul-kozak-fimob-mesyz-dypaz-huvun-zucut-cuxix
    2019-04-10 23:07:47.0
  102. xonid-morov-bemur-lemur-mohib-hohos-betif-dumyn-lygud-lidon-vugyh-sufuk-mucyg-ryven-feleb-tibec-maxox
    2019-04-10 23:26:54.0
  103. xohah-lapun-zutez-povad-kabin-misob-sadip-cicyl-zygip-vymep-nigos-binor-zidas-gecuf-kafyd-todod-nyxox
    2019-04-10 23:27:42.0
  104. xetov-myzor-rypam-depuf-kahul-tepiz-racuv-hegyd-tosen-pifev-kifis-bonav-pafic-zycod-pycel-gocot-dixox
    2019-04-10 23:28:35.0
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.