Third-party notices

What this page is: the open-source software and typefaces that the joinplena.com site delivers to your browser, with their authors and licences, as those licences ask. Last updated 16 October 2026.

PlenaProof's own pages and scripts are not covered by these notices. The signing tool used by institutions carries its own notices file, installed beside the program.

javascript-opentimestamps 0.4.9 — GNU Lesser General Public License, version 3

Copyright © The OpenTimestamps developers. Served to your browser as the separate, unmodified file opentimestamps.min.js, which also contains the small MIT-licensed packages it depends on (such as mime-db).

This library is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. It is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the licence for details.

Source code: github.com/opentimestamps/javascript-opentimestamps. Licence text: gnu.org/licenses/lgpl-3.0.html. Because the library is used as a separate file, you may replace it with a modified version of your own.

qrcode-generator 1.4.4 — MIT License

@supabase/supabase-js 2.48.0 and 2.106.2 — MIT License

The MIT License (for the two libraries above)

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

pdf.js 3.11.174 — Apache License, Version 2.0

Copyright 2023 Mozilla Foundation. Served as vendor/pdfjs-3.11.174/pdf.min.js and pdf.worker.min.js, which carry their own full licence notice. Licensed under the Apache License, Version 2.0; you may not use these files except in compliance with the License. Licence text: apache.org/licenses/LICENSE-2.0. Source: github.com/mozilla/pdf.js.

Typefaces — SIL Open Font License, version 1.1

Some pages load these typefaces from Google Fonts at the time you view them; they are not copied into the site: Outfit (Rodrigo Fuenzalida), Cormorant Garamond (Christian Thalmann), Literata (TypeTogether), IBM Plex Mono (IBM), Atkinson Hyperlegible (Braille Institute of America). Each is licensed under the SIL Open Font License 1.1: openfontlicense.org.

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