Image MIME Reference
FACTI
BlockFact Image
image/vnd.blockfact.facti
VS
PaintShop Pro Image
image/x-paintshoppro
PaintShop-Pro-PSP
A complete technical comparison of BlockFact Image and PaintShop Pro Image — covering compression, feature support, browser compatibility, magic bytes, and when to choose each format.
Equal browser support
Feature Support
| Feature | FACTI | PaintShop-Pro-PSP |
|---|---|---|
| Transparency (Alpha) | Yes | Yes |
| Animation Support | ✕ No | ✕ No |
| Progressive Loading | ✕ No | ✕ No |
| HDR Support | Yes | Yes |
| EXIF Metadata | Yes | Yes |
| ICC Color Profile | Yes | Yes |
BlockFact Image
image/vnd.blockfact.facti
Extension
.facti
Container
BlockFact Authenticated Container
Compression
Container (Inherits payload compression, e.g., JPEG/PNG)
Algorithm
None (Pass-through to embedded payload)
Color Depth
Inherited from payload
Developed by
BlockFact
Released
2025
Magic Bytes
Unknown (Proprietary Container)
PaintShop Pro Image
image/x-paintshoppro
Extension
.psp.pspimage.tub.pat
Container
PSP Chunk-based Format
Compression
Uncompressed / RLE (Run-Length Encoding) / LZ77
Algorithm
RLELZ77
Color Depth
8-bit (Indexed), 16-bit (Grayscale), 24-bit (RGB), 32-bit (RGBA), 48-bit (High Color)
Developed by
Jasc Software / Corel Corporation (Alludo)
Released
1990
Magic Bytes
7E 42 4B 00
Browser Support Comparison
| Browser | FACTI | PaintShop-Pro-PSP |
|---|---|---|
Chrome
|
✕ | ✕ |
Firefox
|
✕ | ✕ |
Safari
|
✕ | ✕ |
Edge
|
✕ | ✕ |
IE (Legacy)
|
✕ | ✕ |
FACTI
FACTI Strengths
- Provides undeniable, mathematically verifiable proof of a photo's origin (time, location, and device) via the StarkNet blockchain [1.3.1]
- Privacy-first design utilizes zero-knowledge proofs (Groth16), meaning the actual image is never uploaded to a central server or blockchain
- Invisible watermarking ensures that even if the image is screenshotted or cropped, tampering can be detected
Limitations
- Lacks native rendering support in web browsers and standard image viewers, requiring specialized software to view
- Requires blockchain registration at the moment of capture, making it incompatible with existing legacy photos
- The proprietary nature of the container limits integration to environments supporting the BlockFact SDK
PaintShop-Pro-PSP
PaintShop-Pro-PSP Strengths
- Provides robust, non-destructive editing capabilities with full support for vector layers, adjustment layers, and layer blend modes
- Historically offered a highly capable and affordable alternative to Adobe Photoshop's PSD format for Windows users
- Features proprietary support for 'Picture Tubes' (.tub), a unique brush technology that paints sequential or random raster objects along a path
Limitations
- Deeply proprietary format tied exclusively to the Corel/Alludo ecosystem
- Third-party software support (like GIMP or ImageMagick) is often limited to parsing older .psp files, frequently failing to render complex layers in modern .pspimage files
- No support in modern web browsers; must be exported to a flattened web format (JPEG/PNG) for online viewing
When to choose which format
FACTI
Use FACTI when…
- Journalism and Media Authentication
- Legal and Insurance Evidence
- AI Deepfake Prevention
- Content Provenance and Authorship
PaintShop-Pro-PSP
Use PaintShop-Pro-PSP when…
- PaintShop Pro Multi-layer Project Archival
- Digital Art and Photo Retouching
- Picture Tubes (.tub) and Custom Patterns (.pat)