BlockFact
Provenance infrastructure for photo, audio, video & live streams
BlockFact proves that media is real — captured on a genuine device, at a given time and place, and unaltered since. Open, standards-based formats cover every medium: .facti (photo), .facta (audio), .factv (video) and .facts (streaming).
Built for broadcast, media, academia, industry and streaming — and the standards that connect them.
The Trust Crisis is Real
As AI erodes the line between real and synthetic, BlockFact proves what actually happened
How It Works
From capture to tamper-evident proof — for photo, audio, video and live streams
Capture at the Source
Provenance is attested at the moment of capture — in the mobile app, through the device SDK, in the DAW, or at broadcast ingest. We confirm the asset came from a genuine device or pipeline, and record the time and place.
Invisible Watermark
A unique, imperceptible fingerprint is embedded into the content itself — pixels, audio or frames. It survives recompression, cropping, transcoding and redistribution, binding the asset to its record.
Cryptographic Proof
A zero-knowledge proof of authenticity is generated at the edge — on-device or in-pipeline, in seconds. Sensitive content never has to leave the capturing environment to be proven.
Blockchain Registration
The proof is anchored on StarkNet, creating a permanent, tamper-evident record. Anyone can verify it independently — no need to trust BlockFact or any single vendor.
Standards-Based Format
The asset is packaged as .facti, .facta, .factv or .facts — open, IANA-registered C2PA formats that carry their own trust record, like a passport that travels with the content.
Verify Anywhere
Anyone can confirm authenticity — at blockfact.io/verify, via the API, or inside standards-compliant tooling. Drop an asset and see whether it matches a registration on-chain.
Under the hood: zero-knowledge proofs, on-chain verification, perceptual embeddings, and C2PA / SMPTE trust records. Read the technical docs →
Why BlockFact is Different
Built for the future of digital trust
Permanent proof
Every registration is recorded on the blockchain — it can't be altered, deleted, or disputed.
Real device verification
We verify the photo came from a real iPhone or Android — not a computer, emulator, or AI tool.
Privacy by design
Your photos never leave your device. Only a cryptographic proof is sent to the blockchain.
Survives sharing
The invisible watermark stays intact through screenshots, cropping, messaging apps, and social media.
Open standard
The .facti format is IANA-registered — anyone can verify a file without needing our app.
Future-proof security
Built with quantum-resistant cryptography. Your registrations stay secure as technology evolves.
Areas of Activity
Provenance for photo, audio, video and streams — applied across five areas
Academic
Assessed work increasingly takes the form of images, audio and video — and generative AI can now fabricate all three. Text-comparison tools don't cover that gap. BlockFact lets students and researchers submit media that is verifiably genuine, supporting assessment integrity, research data and primary evidence.
- →Assessment integrity: coursework verified as genuinely captured by the student
- →Media & creative assignments: journalism, film, photography with proof of origin
- →Fieldwork & research data, unaltered since capture
- →Dissertations & theses: verifiable primary evidence and reproducibility
Supply Chain & Industry
Supply chains run on photographic and recorded evidence: inspection photos, quality checks, maintenance logs and proof of delivery. BlockFact makes that evidence tamper-evident from the moment it is captured, so every party in the chain can rely on it.
- →Inspection & quality-assurance evidence
- →Chain of custody for goods and materials
- →Maintenance and asset records
- →Milestone verification for contracts and stage payments
- →Proof of delivery
Broadcast & Media
Newsrooms, producers and broadcasters need to show that what they publish is authentic. BlockFact provides provenance across photo, audio and video, built to work with the C2PA content-authenticity ecosystem. Our watermark algorithm is in C2PA's approved soft-binding list, so proof of origin can survive even when metadata is stripped.
- →Newsroom and photojournalism verification
- →Audio provenance for interviews, podcasts and music
- →Production and archive workflows
- →Preparing for AI-content transparency rules, such as the EU AI Act
Streaming
Our .facts format brings provenance to live broadcast and streaming workflows, so live and streamed content can carry proof of origin at the point of transmission. Because BlockFact provenance travels with the content, it can also carry the rights and attribution information streaming businesses depend on.
- →Live broadcast & reporting: proof a feed is genuine and unaltered at transmission
- →Tracking origin of samples, stems and clips used in music and audio streaming
- →Monetisation: attaching rights, licensing and attribution so royalties trace to the creator
- →Labelling and disclosure of AI-generated content on streaming platforms
- →Live events & sport: authentic, verifiable highlights and archive material
Others
The same approach applies wherever a photo, recording or video is used as evidence. If you have a use case in mind, we'd like to hear from you.
- →Insurance claims
- →Legal and compliance evidence
- →Property and marketplace listings
- →Web publishing: our WordPress plugin displays verified .facti images on any site
We're actively developing these use cases and welcome conversations with broadcast, events, music, academic and industry partners. Get in touch →
Built on open standards — and helping write them
Provenance is only useful if it interoperates. BlockFact is embedded in the standards bodies defining media authenticity across the industry.
Contributing Member
.facti / .facta / .factv adopted into the C2PA core specification.
Contributing Member — Creator Assertions Working Group
Participating in the working group defining creator and content identity trust.
Professional Member
Contributing to media standards for broadcast and film.
Four registered media types
.facti, .facta, .factv and .facts — officially recognized, like JPEG or PNG.
Taught and trialled at leading universities
BlockFact is taught as state of the art in content provenance and is being trialled for academic-integrity workflows — media assignments submitted and verified through the BlockFact platform.
Regent's University London
University of Nottingham
Iscte — Instituto Universitário de Lisboa
University of PortsmouthA Registry You Don't Have to Trust
Every asset BlockFact signs is anchored to a public, immutable record on the StarkNet blockchain. Verification is independent and permissionless — anyone can confirm an asset's origin without trusting BlockFact, a vendor, or a central authority. No single party owns the proof.
Anchored on StarkNet · live on mainnetEnterprise licensing, SDKs and volume registration are available for broadcast, media, academia, industry and streaming. Talk to us →
Building an integration? Read the developer docs →