Pilot · tinjauan C2PA · Korea Mar 2027 · Jepang Jun 2027 · hukum Korea
Hak cipta C-2026-036487 · Permohonan paten 10-2026-0100026 (belum terdaftar)
Learn C2PA content provenance in 10 chapters
Learn from scratch how to check who made a photo, video, song or document, when, and with which tool. Each chapter starts with a plain explanation. Then you try it yourself on this site.
Intro film
Read the film as text
- Here is one photo. Who made it, when, and with which tool?
- A file has a fingerprint, called a hash. Change one spot and the hash changes completely. 63 of 64 characters changed.
- Five layers protect the source: hidden mark, trace mark, fingerprint, C2PA credential, archive.
- A signature tells you who made it. A trust chain tells you whether you can trust that signer.
- Shrink or re-save a photo, and some marks stay while others disappear. The hash changes, the C2PA credential is often removed, a hidden mark can weaken, and a fingerprint (look-alike) stays similar.
- A practice (SAMPLE) certificate is not a real one. A technical score of A+ is not an official certification.
- When you check a file for someone else, say what was confirmed and what was not. Confirmed: the signer, and no change since signing. Not confirmed: whether the scene is true, and what happened before signing.
- The 10-chapter C2PA practice course. Start with chapter 1.
How the course flows
You move in this order: learn, try, watch an issuance, then check.
- LearnChapters 1–3 · get the ideas
- TryChapters 4–6 · practice in a safe setting
- IssueChapter 7 · your mentor demonstrates a real issuance
- CheckChapters 8–10 · check and sum up
The 10 chapters at a glance
Each chapter answers one question. Select a card to open that chapter.
- Chapter 1
What is C2PA, and why do we need it?
How can you tell where a file came from?DoneOpen this chapter - Chapter 2
File fingerprints (hashes) and practice certificates
Why does the fingerprint change when a file changes?DoneOpen this chapter - Chapter 3
Five layers of stamps that protect the source
Why use five layers of stamps and not just one?DoneOpen this chapter - Chapter 4
A signature tells you who made it
How does a digital signature prove “who”?DoneOpen this chapter - Chapter 5
Trust links together like a chain
How can you trust the person who signed?DoneOpen this chapter - Chapter 6
The stamp you see and the stamp you don't
If you shrink or re-save a photo, does the stamp stay?DoneOpen this chapter - Chapter 7
A practice certificate is not a real one
If a file gets an A+, does that mean it is officially certified?DoneOpen this chapter - Chapter 8
How other people check your file
What can a third party check, and what can't they?DoneOpen this chapter - Chapter 9
Getting onto the international official list
What more is needed to go from a pilot to an official listing?DoneOpen this chapter - Chapter 10
Improvement ideas and honest notices
How do you tell people about trust information without overstating it?DoneOpen this chapter
Three goals of this course
After ten chapters, you can do the three things below. Each goal leaves you with something you made.
- Goal 1
See how provenance attaches to each kind of content
- Understand how a hidden mark, a file fingerprint and a C2PA credential attach to images, video, audio and documents.
- Shrink or re-save a photo and run a short experiment: what stays, and what changes?
You will makeA comparison table of provenance methods by content type, and a summary table of your alteration experiments - Goal 2
Check it hands-on
- Walk through learn, try, issue and check by hand, together with your mentor.
- Look up a certificate by its serial number, and see whether the check fails when a file is slightly changed.
- Practice sorting your findings into “what was confirmed” and “what was not confirmed.”
You will makeA practice log for each chapter, and a summary of your certificate check results - Goal 3
Plan ahead and write honest wording
- Find out what it takes to get onto the international official trust list, and compare that with where this site is now (a pilot).
- Look at the rules at home and abroad that ask for labels on AI-generated content, such as Korea's AI Basic Act.
- Write sample wording that shares trust information without exaggeration.
You will makeA gaps-and-improvements report, and sample trust-information wording
Practice rules
You practice on the live site, so please keep these six rules.
- You practice in a practice setting (a sandbox) with SAMPLE practice certificates.
- Real certificates are issued only while your mentor is watching.
- The secret key (private key) used for signing is kept offline, in a dedicated security device (an HSM). Never touch it or ask for it.
- Do not change any manifest or evidence material that is under review.
- A signature only tells you who signed. It does not guarantee that the content is true.
- Do not mix up the technical score A+ with the official trust level (for now: pilot, not listed).
An industry mentor (pipeline, PKI and watermark fields) and a faculty advisor teach the course together. You get feedback on your results from each step at regular reviews.
What you leave with
The notes you write in each chapter add up to your final deliverables.
- Comparison table of provenance methods by content typeYou make it in chapter 3
- Summary table of alteration experimentsYou make it in chapter 6
- Practice logOne sheet for each chapter
- Summary of certificate check resultsYou make it in chapter 8
- Gaps-and-improvements reportYou make it in chapter 10
- Sample trust-information wordingYou make it in chapter 10
The SAMPLE certificates and demo results in this course are for practice. This site's pilot certificate authority (CA) is not yet on the international official trust list (the C2PA Trust List).