Real signed files. Check them yourself.
Text, images, audio and video, each with C2PAC2PA: The Coalition for Content Provenance and Authenticity: the group that publishes the open standard for content labels. Content CredentialsContent Credentials: The public name for a C2PA label, often shown as a small CR icon that opens who signed the content and what they declared. built in. Download a sample and check where it came from, free.
Your uploads stay out of public galleries.
A signed paragraph of our own copy
Hidden C2PA markers carry the label inside the words. Download the file to keep them, then check it.
Download the signed file20,853 bytes, text/plain. Free, no account.
| Check | Recorded at signing | Verify to see live results |
|---|---|---|
| Verdict | valid | - |
| Integrity | not reported | - |
| Signer trust | trusted | - |
| Signer | not reported | - |
| Declared spec version | 2.4 | - |
| Validated under | 2.4 | - |
| RFC 3161 timestamp | not reported | - |
| Watermark signal | not reported | - |
| Ingredients | none | - |
| Conformance gate | not reported / not reported | - |
| Checked by | POST /api/v1/public/verify, 2026-09-07T15:37:38.741Z | - |
A signed Encypher brand card
This brand card carries a C2PA label in the file. Check who signed it, when, and if it changed.
Download the signed file38,818 bytes, image/jpeg. Free, no account.
| Check | Recorded at signing | Verify to see live results |
|---|---|---|
| Verdict | valid | - |
| Integrity | not reported | - |
| Signer trust | trusted | - |
| Signer | Encypher | - |
| Declared spec version | 2.4 | - |
| Validated under | 2.4 | - |
| RFC 3161 timestamp | yes | - |
| Watermark signal | not reported | - |
| Ingredients | encypher-card.jpg (parentOf) | - |
| Conformance gate | not reported / not reported | - |
| Checked by | POST /api/v1/verify/image, 2026-09-07T15:37:46.233Z | - |
A signed eight-second audio clip
This eight-second clip carries a C2PA label in the file. Play it, download it, and check it.
Download the signed file1,419,620 bytes, audio/wav. Free, no account.
| Check | Recorded at signing | Verify to see live results |
|---|---|---|
| Verdict | valid | - |
| Integrity | not reported | - |
| Signer trust | trusted | - |
| Signer | Encypher | - |
| Declared spec version | 2.4 | - |
| Validated under | 2.4 | - |
| RFC 3161 timestamp | yes | - |
| Watermark signal | not reported | - |
| Ingredients | none | - |
| Conformance gate | not reported / not reported | - |
| Checked by | POST /api/v1/verify/audio, 2026-09-07T15:03:28.925Z | - |
A signed six-second video clip
This six-second clip carries a C2PA label in the file. Watch it, then check the file.
Download the signed file44,029 bytes, video/mp4. Free, no account.
| Check | Recorded at signing | Verify to see live results |
|---|---|---|
| Verdict | valid | - |
| Integrity | not reported | - |
| Signer trust | trusted | - |
| Signer | Encypher | - |
| Declared spec version | 2.4 | - |
| Validated under | 2.4 | - |
| RFC 3161 timestamp | yes | - |
| Watermark signal | not reported | - |
| Ingredients | encypher-product-clip.mp4 (parentOf) | - |
| Conformance gate | not reported / not reported | - |
| Checked by | POST /api/v1/verify/video, 2026-09-07T15:03:33.340Z | - |
A derivative signed with its source declared as an ingredient
This file names an earlier signed file as its source. Check it to see both.
Download the signed file31,933 bytes, image/jpeg. Free, no account.
| Check | Recorded at signing | Verify to see live results |
|---|---|---|
| Verdict | valid | - |
| Integrity | not reported | - |
| Signer trust | trusted | - |
| Signer | Encypher | - |
| Declared spec version | 2.4 | - |
| Validated under | 2.4 | - |
| RFC 3161 timestamp | yes | - |
| Watermark signal | not reported | - |
| Ingredients | encypher-card-signed.jpg (parentOf) | - |
| Conformance gate | not reported / not reported | - |
| Checked by | POST /api/v1/verify/image, 2026-09-07T15:37:53.098Z | - |
Find your format.
75+ formats for signing and verification. Here is how they split by kind of file.
- Each sample shows its media typeMIME type: The standard name for a file format, such as image/jpeg or audio/wav, that software uses to decide how to read a file., a hashHash: A short fingerprint of exact bytes. Any change, even one character, gives a completely different hash. of its bytes, and the time our timestamp authorityTimestamp authority: An outside service that signs the time a record existed, so a signature stays checkable after its certificate expires. recorded.
- The composition names an earlier signed file as an ingredientIngredient: A source file used to make new content, recorded in the new content's label with a link to its own label., a source it was built from.
- 20 media types also passed the C2PA Conformance ProgramC2PA Conformance Program: The C2PA's test that checks a product builds and reads labels the way the standard says before it is listed as conforming..
- A watermarkWatermark: A mark placed in the content itself, visible or hidden, so it can be found again after the file is copied. is a separate tool, with its own list of formats.
Samples published 2026-09-07T15:37:53.153Z. Each file has a fingerprint, listed for engineers below.
For engineers: samples and format support
Show the technical detailSigning details, counts and the per-format table
A signed paragraph of our own copy
- Format support
- text/plain: signing supported, verification supported. Signable under C2PA 2.4. Outside the current C2PA Conformance Program coverage.
- Signing details
- Signed 2026-09-07T15:37:38.742Z through POST /api/v1/sign with action c2pa.created, no declared ingredients. Signed with C2PA Content Credentials, without a separate watermark. SHA-256 of the published bytes: 42e328461b2181b63c0f2e891d4c8af753351cbfd71899e9460920a1ebef90ab
A signed Encypher brand card
- Format support
- image/jpeg: signing supported, verification supported. Signable under C2PA 2.2 and 2.4. Covered by the formal C2PA 2.2 Conformance Program pass.
- Signing details
- Signed 2026-09-07T15:37:46.287Z through POST /api/v1/sign/media with action c2pa.opened, 1 declared ingredient. Signed with C2PA Content Credentials, without a separate watermark. SHA-256 of the published bytes: 9cf420cef39395cb4776653b353556e92b065caaa6c8881553735898605ef398
A signed eight-second audio clip
- Format support
- audio/wav: signing supported, verification supported. Signable under C2PA 2.2 and 2.4. Covered by the formal C2PA 2.2 Conformance Program pass.
- Signing details
- Signed 2026-09-07T15:03:28.926Z through POST /api/v1/sign/media with action c2pa.opened, no declared ingredients. Signed with C2PA Content Credentials, without a separate watermark. SHA-256 of the published bytes: a18c5d8f8b647eb098e606cd9a5c832791f28e0663ab1f9d81f8e4a84a1f7343
A signed six-second video clip
- Format support
- video/mp4: signing supported, verification supported. Signable under C2PA 2.2 and 2.4. Covered by the formal C2PA 2.2 Conformance Program pass.
- Signing details
- Signed 2026-09-07T15:03:33.340Z through POST /api/v1/sign/media with action c2pa.opened, 1 declared ingredient. Signed with C2PA Content Credentials, without a separate watermark. SHA-256 of the published bytes: 5d03b045585d824df04b5fcd34bf1c5418a04000ddce2beaa4c4bbc4adc88f49
A derivative signed with its source declared as an ingredient
- Format support
- image/jpeg: signing supported, verification supported. Signable under C2PA 2.2 and 2.4. Covered by the formal C2PA 2.2 Conformance Program pass.
- Signing details
- Signed 2026-09-07T15:37:53.153Z through POST /api/v1/sign/media with action c2pa.resized, 1 declared ingredient. Signed with C2PA Content Credentials, without a separate watermark. SHA-256 of the published bytes: c0653387e3d2acac6c3e4af1a6ca3da4018e816d9795e319996d2e2976a607c5
Format counts
- Signing and verification: 79
- File formats supported for both signing and verification.
- Signing: 86
- File formats accepted by the signing API.
- Verification: 79
- File formats the verifier supports. Each result names the C2PA version it checked against.
- Signing under C2PA 2.4: 76
- Formats that support both signing and verification, with signing available under C2PA 2.4.
- Media-type spellings: 101
- Accepted MIME types, including aliases such as image/jpg for image/jpeg.
- Formal C2PA 2.2 conformance: 20
- Media types covered by Encypher's formal C2PA 2.2 Conformance Program pass.
- Watermarking: separate
- Watermarking has its own media support. These samples show embedded C2PA Content Credentials.
Joint sign-and-verify formats by category: audio 6, document 37, font 3, image 13, text 13, video 7. Coverage snapshot. See the current format matrix for the latest support.
C2PA support by format
The live format table is unavailable. View the public format matrix.