Product: AdToon
Font ID: chalk-s
Font name: チョークS / Chalk-S JP
Classification: 同梱OK（装飾用途・注意事項あり、2026-07-15追加再調査）
Intended use: 黒板文字、学園シーン、タイトル、効果音

Primary source:
- Author distribution page: https://font.cutegirl.jp/chalk-s.html
- Downloaded archive: https://font.cutegirl.jp/wp-content/uploads/2021/04/Chalk-S_3_JP.zip
- Base font: Fontworks Stick
- Base font repository: https://github.com/fontworks-fonts/Stick
- Base font Google Fonts copy: https://github.com/google/fonts/tree/main/ofl/stick

License:
- SIL Open Font License 1.1
- The distribution page states that Chalk-S is a modified version of Stick and is released under OFL 1.1.
- The downloaded README and the font's internal copyright field identify the base copyright as:
  Copyright 2020 The Stick Project Authors (https://github.com/fontworks-fonts/Stick/)
- The font's internal license fields state OFL 1.1 and https://scripts.sil.org/OFL.
- The modified family name is Chalk-S JP, not Stick. The upstream Stick OFL does not declare a Reserved Font Name.
- Keep the downloaded OFL.txt, README-original.txt, the copyright-bearing UPSTREAM_STICK_OFL.txt, and this file with Chalk-S-JP.otf.

Source discrepancy retained for audit:
- The author distribution page correctly describes the font as a Stick derivative, but its displayed copyright quotation says "The Klee Project Authors".
- The downloaded README, the Chalk-S-JP.otf internal metadata, and the linked base repository consistently identify Stick instead.
- AdToon therefore preserves the downloaded evidence and the official Stick OFL together, rather than relying on the web-page quotation alone.

Technical verification (2026-07-15):
- Archive SHA-256: 87F310CF4A48B89856237CA9532B444FED0D3F9F4292161EB45D8632E55F6B7F
- File: Chalk-S-JP.otf
- File SHA-256: AE91095C2593274FD9440B638A8DF59808366F4480F4B46B0F648EBF0D7C1CE8
- Internal full name: Chalk-S JP
- Internal version: 1.200
- Glyph count: 9,362
- Unicode cmap entries: 8,223
- Unified CJK ideographs mapped: 6,713
- OS/2 fsType: 0 (no embedding restriction bit)
- OpenType GSUB includes vert and vrt2 vertical-writing features.
- Compared with the current Google Fonts Stick binary, the glyph count is identical but Chalk-S lacks 8 Unicode cmap mappings: U+7259, U+F992, U+F993, U+F9EC, U+2F818, U+2F877, U+2F8DC, U+2F8ED.
- U+7259 (牙) is an ordinary kanji. Use Chalk-S as a decorative font with fallback, not as the default body or dialogue font.

This memo is a project audit record, not a legal opinion or warranty.