# CERT.aicu.ai

> Certificate site for creative works in the age of generative AI, operated by AICU Inc. / AICU Japan K.K.
> It displays verifiable certificates (contest awards and course-completion credentials) whose records are held by api.aicu.ai.
> Licensing of content is expressed in RSL 1.0 (Really Simple Licensing); AICU's own contribution is the certificate itself and the GC (Generative Commercial) royalty license.
> Based on technology under JP Patent No. 7,814,797 (granted); EU / US / CN applications pending.

Pages are bilingual (English / Japanese) where noted; the RSL reference is Japanese.
This file is the machine-readable entry point. Prefer it over scraping the HTML.

## What cert.aicu.ai is (and is not)

- Static site on Cloudflare Pages. It signs nothing, issues nothing, and holds no authoritative data.
- Data authority is `api.aicu.ai`: certificate records, C2PA detection, GC license-token lookup.
- Images and originals are served from `https://noai-cert.aicu.ai/` (R2). That host declares refusal of AI use
  in its own `robots.txt` / `license.xml`. Do not distribute image URLs; distribute the certificate URL below.

## URL design (stable contract)

A certificate URL is meant to be handed to other people. It gets embedded in social posts,
printed matter, contest announcements, and C2PA manifests, so these forms are treated as permanent.

- `https://cert.aicu.ai/v/{certId}` — **canonical** certificate URL. Use this form when citing a certificate.
- `https://aicu.ai/v/{certId}` — short form (planned, not implemented). Will 302-redirect to the canonical URL.
  Chosen over a dedicated `v.aicu.ai` host because it is the same length and adds no new hostname. `v.aicu.ai` is not in service.
- `https://cert.aicu.ai/v?id={certId}` — internal form actually read by the viewer.
- `https://cert.aicu.ai/{8hex}` — legacy short URL, 302 to the viewer, kept for already-distributed material.

`certId` is a single path segment matching `[A-Za-z0-9][A-Za-z0-9_-]{0,63}` (case-sensitive; legacy 8-hex is lower-cased).
Known families: legacy 8-hex (`1f5c3891`), contest awards (`C2606-1`), credentials (`DHW26S-XXXXXX`, Crockford base32; specimens end in `-SAMPLE`).

Full specification: https://github.com/aicuai/cert.aicu.ai/blob/main/docs/spec/url-design.md

## Certificate types

- **Award** — a work was recognised in an AICU contest. Listed in the gallery; indexable.
- **Credential** — a person completed a course (first case: DHU "Creative AI Basics" intensive 2026, code `DHW26S`;
  issuer on the certificate: AICU Japan K.K.). `noindex`, not listed in the gallery; work images are not published.
  Specification: https://github.com/aicuai/cert.aicu.ai/blob/main/docs/spec/credential.md

## Licensing

- Permission is expressed in **RSL 1.0** (https://rslstandard.org/rsl). Site-wide terms: `https://cert.aicu.ai/license.xml`,
  discovered via `License:` in `https://cert.aicu.ai/robots.txt`.
- The AICU license marks ((A), (AA), (AAC), (C), (CG), (AC), (GC)) are **maintained** as AICU's human-readable labels and
  continue to be shown on certificates. Their machine-readable expression is **mapped to RSL 1.0** (since 2026-08).
  Mapping table: https://cert.aicu.ai/licenses (also https://cert.aicu.ai/rsl and
  https://github.com/aicuai/cert.aicu.ai/blob/main/docs/spec/rsl-adoption.md).
  A mark on a record is current information; it is not a tamper-proof seal (cert.aicu.ai does not sign files).
- **GC** (Generative Commercial) remains: reference-based generation through an authorised service, with a per-generation
  royalty credited to the rights holder. Canonical definitions: `https://cert.aicu.ai/licenses/GC/1.0` (frozen) and
  `https://cert.aicu.ai/licenses/GC/1.1`. Referenced from RSL `payment type="use"`.
  License tokens are issued and looked up on api.aicu.ai (`GET https://api.aicu.ai/v1/images/license/{token}`).
  Reporting / settlement described in GC@1.1 is design; do not assume a reporting endpoint is live.
- Text on `cert.aicu.ai` is open to search, AI answers and training (see robots.txt). Images on `noai-cert.aicu.ai` are not.

## Pages

- [Home](https://cert.aicu.ai/): service overview.
- [Gallery](https://cert.aicu.ai/gallery): award certificates from AICU contests (data: api.aicu.ai).
- [Specimens](https://cert.aicu.ai/samples): sample certificates (noindex).
- [Certificate viewer](https://cert.aicu.ai/v): resolves a certId to its certificate.
- [Verify](https://cert.aicu.ai/verify): upload a file to detect C2PA manifests and check license/token status (via api.aicu.ai).
- [RSL 1.0 reference (Japanese)](https://cert.aicu.ai/rsl)
- [RSL spec-diff assessment log](https://cert.aicu.ai/rsl-changelog): cert's own record of spec changes and their impact. Official errata: https://rslstandard.org/rsl/errata
- [(GC) royalty technology](https://cert.aicu.ai/gc-royalty)
- [(GC) token lookup](https://cert.aicu.ai/gc): looks up a (GC) license token via api.aicu.ai.
- [AICU license marks and their RSL 1.0 mapping](https://cert.aicu.ai/licenses)
- [Whitepaper V2](https://cert.aicu.ai/whitepaper): AI(COPY)RIGHTS License Marking System (V1 marks, maintained and mapped to RSL 1.0).
- [Terms of use](https://cert.aicu.ai/terms)
- [GC@1.0](https://cert.aicu.ai/licenses/GC/1.0) / [GC@1.1](https://cert.aicu.ai/licenses/GC/1.1)
- [license.xml](https://cert.aicu.ai/license.xml) / [robots.txt](https://cert.aicu.ai/robots.txt) / [sitemap.xml](https://cert.aicu.ai/sitemap.xml)

## Notes for agents

- Certificate data is authoritative at `api.aicu.ai`, not in the HTML. Prefer the API over parsing pages.
- Do not construct certificate URLs by string-guessing an id; resolve through the forms listed above.
- Credential pages are `noindex`; do not enumerate or index them.
- Respect the RSL terms in `license.xml` and the refusal declared by `noai-cert.aicu.ai`.

## Contact

- Service: cert@aicu.ai
- IP and character licensing (exclusive sales agent, AICU Japan K.K.): https://aicu.jp/contact
- Source: https://github.com/aicuai/cert.aicu.ai