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Attribution & Legal Notices

StoneFrog Knots

Data Sources

Knots aggregates music metadata from the following sources. We are grateful to these projects and services for making music data accessible.

  • MusicBrainzCC0 (Public Domain)

    Artist metadata, relationships, release groups, recordings, and identifiers from the MusicBrainz database. Operated by MetaBrainz Foundation.

  • WikipediaCC BY-SA

    Artist biographies fetched on-demand via Wikipedia API. Content links back to original Wikipedia articles.

  • WikidataCC0

    Structured data including birth/death dates, locations, band member tenures, and instruments.

  • DiscogsPublic Data Dumps

    Selected metadata derived from publicly available Discogs data releases. Discogs® is a trademark of Zink Media, LLC.

  • Last.fmProprietary

    Artist images, top albums, and play count statistics.

  • Fanart.tvMixed

    High-quality artist images, backgrounds, and logos.

  • Setlist.fmProprietary

    Concert history, venues, and past show information.

  • OpenStreetMapODbL

    Map tiles and geographic data for venue and location visualization.

Music Service Integrations

Knots integrates with the following music services to enhance your experience:

  • SpotifyProprietary

    OAuth authentication, library sync, followed artists, and playback links.

  • Apple MusicProprietary

    OAuth authentication and library sync via MusicKit.

Non-Affiliation Notice

Knots is an independent project and is not affiliated with, endorsed by, or sponsored by any of the following:

  • Spotify AB or Spotify Technology S.A.
  • Apple Inc. or Apple Music
  • MetaBrainz Foundation or MusicBrainz
  • Wikimedia Foundation, Wikipedia, or Wikidata
  • Discogs (Zink Media, LLC)
  • Last.fm Ltd. (Paramount Global)
  • Fanart.tv
  • Setlist.fm (Setlist.fm GmbH)
  • OpenStreetMap Foundation

All trademarks, service marks, and company names are the property of their respective owners.

Open Source Libraries

Knots is built with many open source libraries. We thank the open source community for their contributions. Key dependencies include:

  • Next.js (MIT License)
  • React (MIT License)
  • Cytoscape.js (MIT License)
  • D3.js (ISC License)
  • TanStack Query (MIT License)
  • Tailwind CSS (MIT License)
  • Leaflet (BSD-2-Clause License)

For a complete list of dependencies and their licenses, see our package.json file in the source repository.

Trademarks

Knots™ and StoneFrog™ are trademarks of StoneFrog. All other trademarks, service marks, and company names mentioned herein are the property of their respective owners.

The Knots name, StoneFrog name, and associated logos are protected marks and may not be used without prior written permission.

Original Artwork

The Celtic StoneFrog logo and Knots frog characterare original artwork created by and © StoneFrog. These images are protected by copyright law and may not be reproduced, distributed, modified, or used for any purpose without express written permission.

Unauthorized use of this artwork, including but not limited to copying, tracing, or creating derivative works, is strictly prohibited.

Copyright

© 2026 StoneFrog. All rights reserved.

The Knots™ application, including its user interface designs, graph visualizations, relationship models, and original source code, are the intellectual property of StoneFrog unless otherwise noted.

Contact

For attribution questions or concerns: [email protected]