meta: add licensing, attribution, and provenance documentation

LICENSES/Jura-OFL-1.1.txt

@@ -0,0 +1,92 @@
+Copyright Cyreal (https://github.com/cyrealtype)
+
+This Font Software is licensed under the SIL Open Font License, Version 1.1.
+This license is copied below, and is also available with a FAQ at:
+http://scripts.sil.org/OFL
+
+-----------------------------------------------------------
+SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007
+-----------------------------------------------------------
+
+PREAMBLE
+The goals of the Open Font License (OFL) are to stimulate worldwide
+development of collaborative font projects, to support the font creation
+efforts of academic and linguistic communities, and to provide a free and
+open framework in which fonts may be shared and improved in partnership
+with others.
+
+The OFL allows the licensed fonts to be used, studied, modified and
+redistributed freely as long as they are not sold by themselves. The
+fonts, including any derivative works, can be bundled, embedded, 
+redistributed and/or sold with any software provided that any reserved
+names are not used by derivative works. The fonts and derivatives,
+however, cannot be released under any other type of license. The
+requirement for fonts to remain under this license does not apply
+to any document created using the fonts or their derivatives.
+
+DEFINITIONS
+"Font Software" refers to the set of files released by the Copyright
+Holder(s) under this license and clearly marked as such. This may
+include source files, build scripts and documentation.
+
+"Reserved Font Name" refers to any names specified as such after the
+copyright statement(s).
+
+"Original Version" refers to the collection of Font Software components as
+distributed by the Copyright Holder(s).
+
+"Modified Version" refers to any derivative made by adding to, deleting,
+or substituting -- in part or in whole -- any of the components of the
+Original Version, by changing formats or by porting the Font Software to a
+new environment.
+
+"Author" refers to any designer, engineer, programmer, technical
+writer or other person who contributed to the Font Software.
+
+PERMISSION & CONDITIONS
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of the Font Software, to use, study, copy, merge, embed, modify,
+redistribute, and sell modified and unmodified copies of the Font
+Software, subject to the following conditions:
+
+1) Neither the Font Software nor any of its individual components,
+in Original or Modified Versions, may be sold by itself.
+
+2) Original or Modified Versions of the Font Software may be bundled,
+redistributed and/or sold with any software, provided that each copy
+contains the above copyright notice and this license. These can be
+included either as stand-alone text files, human-readable headers or
+in the appropriate machine-readable metadata fields within text or
+binary files as long as those fields can be easily viewed by the user.
+
+3) No Modified Version of the Font Software may use the Reserved Font
+Name(s) unless explicit written permission is granted by the corresponding
+Copyright Holder. This restriction only applies to the primary font name as
+presented to the users.
+
+4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font
+Software shall not be used to promote, endorse or advertise any
+Modified Version, except to acknowledge the contribution(s) of the
+Copyright Holder(s) and the Author(s) or with their explicit written
+permission.
+
+5) The Font Software, modified or unmodified, in part or in whole,
+must be distributed entirely under this license, and must not be
+distributed under any other license. The requirement for fonts to
+remain under this license does not apply to any document created
+using the Font Software.
+
+TERMINATION
+This license becomes null and void if any of the above conditions are
+not met.
+
+DISCLAIMER
+THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
+OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE
+COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
+DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM
+OTHER DEALINGS IN THE FONT SOFTWARE.

LICENSES/MIT.txt

@@ -0,0 +1,24 @@
+Valid-License-Identifier: MIT
+License-Text:
+
+MIT License
+
+Copyright (c) 2019 The nixos-homepage contributors
+
+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.

LICENSES/Route159-OFL-1.1.txt

@@ -0,0 +1,93 @@
+Copyright (c) 2015, Sora Sagano ([email protected])
+
+This Font Software is licensed under the SIL Open Font License, Version 1.1.
+This license is copied below, and is also available with a FAQ at:
+http://scripts.sil.org/OFL
+
+
+-----------------------------------------------------------
+SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007
+-----------------------------------------------------------
+
+PREAMBLE
+The goals of the Open Font License (OFL) are to stimulate worldwide
+development of collaborative font projects, to support the font creation
+efforts of academic and linguistic communities, and to provide a free and
+open framework in which fonts may be shared and improved in partnership
+with others.
+
+The OFL allows the licensed fonts to be used, studied, modified and
+redistributed freely as long as they are not sold by themselves. The
+fonts, including any derivative works, can be bundled, embedded, 
+redistributed and/or sold with any software provided that any reserved
+names are not used by derivative works. The fonts and derivatives,
+however, cannot be released under any other type of license. The
+requirement for fonts to remain under this license does not apply
+to any document created using the fonts or their derivatives.
+
+DEFINITIONS
+"Font Software" refers to the set of files released by the Copyright
+Holder(s) under this license and clearly marked as such. This may
+include source files, build scripts and documentation.
+
+"Reserved Font Name" refers to any names specified as such after the
+copyright statement(s).
+
+"Original Version" refers to the collection of Font Software components as
+distributed by the Copyright Holder(s).
+
+"Modified Version" refers to any derivative made by adding to, deleting,
+or substituting -- in part or in whole -- any of the components of the
+Original Version, by changing formats or by porting the Font Software to a
+new environment.
+
+"Author" refers to any designer, engineer, programmer, technical
+writer or other person who contributed to the Font Software.
+
+PERMISSION & CONDITIONS
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of the Font Software, to use, study, copy, merge, embed, modify,
+redistribute, and sell modified and unmodified copies of the Font
+Software, subject to the following conditions:
+
+1) Neither the Font Software nor any of its individual components,
+in Original or Modified Versions, may be sold by itself.
+
+2) Original or Modified Versions of the Font Software may be bundled,
+redistributed and/or sold with any software, provided that each copy
+contains the above copyright notice and this license. These can be
+included either as stand-alone text files, human-readable headers or
+in the appropriate machine-readable metadata fields within text or
+binary files as long as those fields can be easily viewed by the user.
+
+3) No Modified Version of the Font Software may use the Reserved Font
+Name(s) unless explicit written permission is granted by the corresponding
+Copyright Holder. This restriction only applies to the primary font name as
+presented to the users.
+
+4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font
+Software shall not be used to promote, endorse or advertise any
+Modified Version, except to acknowledge the contribution(s) of the
+Copyright Holder(s) and the Author(s) or with their explicit written
+permission.
+
+5) The Font Software, modified or unmodified, in part or in whole,
+must be distributed entirely under this license, and must not be
+distributed under any other license. The requirement for fonts to
+remain under this license does not apply to any document created
+using the Font Software.
+
+TERMINATION
+This license becomes null and void if any of the above conditions are
+not met.
+
+DISCLAIMER
+THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
+OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE
+COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
+DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM
+OTHER DEALINGS IN THE FONT SOFTWARE.

README.md

@@ -134,6 +134,68 @@ It can also be used with the `--rebuild` flag.
 nix run .\#nixos-branding.verification.verify-nixos-branding-all
 ```
 
+## License and Attribution
+
+This repository contains both **software code** and **design assets** used for the NixOS visual identity.
+
+### Code
+
+Source code files (for example, `.py` and `.nix` files) are licensed under the **MIT License**.
+See [`LICENSES/MIT.txt`](LICENSES/MIT.txt) for full terms.
+
+### Design Assets
+
+Creative works — including the NixOS logos, logotypes, color palettes, and related design files — are licensed under the **Creative Commons Attribution 4.0 International License (CC BY 4.0)**.
+See [`LICENSES/CC-BY-4.0.txt`](LICENSES/CC-BY-4.0.txt) or <https://creativecommons.org/licenses/by/4.0/>.
+
+### Fonts
+
+- Jura font by
+  Alexei Vanyashin, Daniel Johnson, Guldana Tauasar (Cyrillic), and Irene Vlachou (Greek)
+  from [alexeiva/jura](https://github.com/alexeiva/jura)
+  licensed under **SIL Open Font License, Version 1.1 (OFL-1.1)**.
+  See [`LICENSES/Jura-OFL-1.1.txt`](LICENSES/Jura-OFL-1.1.txt) or <https://openfontlicense.org/> for full terms.
+
+- Route 159 font
+  by Sora Sagano
+  from [dotcolon](https://www.dotcolon.net/fonts/route159/)
+  licensed under **SIL Open Font License, Version 1.1 (OFL-1.1)**.
+  See [`LICENSES/Route159-OFL-1.1.txt`](LICENSES/Route159-OFL-1.1.txt) or <https://openfontlicense.org/> for full terms.
+
+### Attribution for NixOS Branding Assets
+
+The NixOS branding assets may be shared and adapted for any purpose, including commercial use, provided that you:
+
+- Give appropriate credit to the **NixOS Project** and contributors.
+- Provide a link to the license.
+- Indicate if changes were made.
+
+Please use the **TASL format** (Title, Author, Source, License) for attribution. For example:
+
+> “NixOS Logo” by [Simon Frankau](https://github.com/simon-frankau),
+> [Tim Cuthbertson](https://github.com/timbertson),
+> and [Daniel Baker](https://github.com/djacu)
+> (maintained by the [NixOS Marketing Team](https://nixos.org/community/teams/marketing/)),
+> from [nixos/branding](https://github.com/NixOS/branding),
+> licensed under [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/).
+
+### Logo Attribution
+
+The NixOS logo has evolved through several community revisions:
+
+- **Original design** by [Simon Frankau (@simon-frankau)](https://github.com/simon-frankau)\
+  [View commit → d5af1e3971822b8a3ec19689a17464558baf7244](https://github.com/NixOS/nixos-homepage/commit/d5af1e3971822b8a3ec19689a17464558baf7244)
+- **Revision** by [Tim Cuthbertson (@timbertson)](https://github.com/timbertson)\
+  [View pull request → #55](https://github.com/NixOS/nixos-homepage/pull/55)
+- **Further revision** by [Daniel Baker (@djacu)](https://github.com/djacu)\
+  [View pull request → #1](https://github.com/NixOS/branding/pull/1)
+
+All versions are licensed under the [Creative Commons Attribution 4.0 International License (CC BY 4.0)](https://creativecommons.org/licenses/by/4.0/).
+
+> For historical licensing correspondence, see
+> [`docs/provenance/`](docs/provenance/) for records confirming continued
+> permission to use and modify the NixOS logo under CC BY 4.0.
+
 ## Contact
 
 For questions, feedback, or to request approval for brand use, reach out to the [NixOS Marketing Team](https://nixos.org/community/teams/marketing/).

docs/provenance/README.md

@@ -0,0 +1,55 @@
+# Provenance Documentation
+
+This directory contains correspondence and records verifying the authorship,
+permissions, and licensing history of the NixOS logo.
+
+Each entry documents a conversation confirming that the logo may be distributed
+and modified under the **Creative Commons Attribution 4.0 International License
+(CC BY 4.0)**.
+
+These records ensure the license chain for the NixOS logo remains verifiable and
+transparent across its historical revisions.
+
+______________________________________________________________________
+
+## Files
+
+### `nixos-logo-permission-20161002-cuthbertson.txt`
+
+Public mailing list discussion between **Tim Cuthbertson** and the NixOS
+community (October 2016). In this thread, Tim confirms that the NixOS logo is
+released under the **CC BY** license and may be freely used or modified,
+provided attribution is preserved and changes are noted. Original archive link:
+<https://releases.nixos.org/nix-dev/2016-October/021876.html>
+
+### `nixos-logo-permission-20250917-cuthbertson.txt`
+
+Private email correspondence between **Daniel Baker**, **Eelco Dolstra**, and
+**Tim Cuthbertson** (September 2025). Daniel requested confirmation to continue
+licensing the NixOS logo under **CC BY 4.0** for the modern branding repository.
+Eelco agreed while clarifying he was not the logo’s creator; Tim confirmed his
+consent (“Also fine with me 👍”). This exchange serves as formal acknowledgment
+of continued permission for the NixOS logo under the same license.
+
+### `jura-font-attribution-20251013-cyreal.txt`
+
+Email exchange between **Alexei Vanyashin (Cyreal)** and **Daniel Baker**
+confirming the correct authorship and license attribution for the **Jura**
+font used in NixOS branding.
+Confirms SIL Open Font License (OFL 1.1) and attribution formatting.
+
+______________________________________________________________________
+
+## Privacy Notice
+
+All personal email addresses have been redacted. Unredacted copies of private
+correspondence are securely retained by **Daniel Baker** for provenance
+verification.
+
+Publicly archived discussions (e.g., the 2016 mailing list thread) are linked
+rather than redistributed in full, though key excerpts are vendored here for
+long-term reference.
+
+______________________________________________________________________
+
+_Last updated: 2025-12-01_