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Prove Your Photo is Real — Not AI Generated

Accused of using Midjourney, DALL-E, Stable Diffusion or Flux when your photo is genuine human work? With Adobe reporting over 34 million AI images generated every single day in 2024, authentic creators now need cryptographic proof. CHECKHC delivers pre-publication blockchain certification — Solana + Arweave, 200+ year storage, GDPR-compatible SHA-256 hash — that instantly silences false AI accusations.

Certify Your Work Now

10 free certifications. Permanent proof of authenticity.

The Growing Problem

AI art has become so good that real photographers are being accused of faking their work. This damages careers and destroys trust.

Sound Familiar?

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"That looks AI-generated" - Comments dismissing your hard work as fake.

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Rejected submissions - Contests and galleries suspicious of authentic entries.

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Lost clients - Potential buyers doubting the authenticity of your portfolio.

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Copyright disputes - Needing to prove you actually created your work.

In photography forums and social media, "is this AI?" has become the most common question. Even award-winning photographers face accusations. The problem will only get worse—unless you have proof.

The Solution

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AI Detection Analysis

Our AI models analyze your image and confirm it's not AI-generated. Get a confidence score that proves your work is authentic human creation.

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Blockchain Proof

Your authenticity verification is permanently recorded on the blockchain. Unforgeable, tamper-proof evidence that exists forever.

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Timestamp Evidence

Prove when your photo existed. Establish priority over copiers and demonstrate original creation date.

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Shareable Verification

Get a unique verification link to share with clients, galleries, and skeptics. One click proves your work is real.

Who Needs Proof of Authenticity?

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Photographers

Protect your portfolio from AI accusations. Prove every shot is genuinely captured.

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Digital Artists

Show your creative work is human-made. Stand out from AI-generated content.

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Competition Entrants

Pre-certify entries before submission. Avoid disqualification from AI suspicion.

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Professional Creators

Build client trust with verified authenticity. Justify premium pricing for real work.

How the Proactive Authenticity Workflow Works in Detail

A transparent, auditable pipeline that combines forensic AI detection with permanent blockchain anchoring — before anyone has a chance to doubt you.

The CHECKHC pipeline runs on the same infrastructure trusted by newsrooms and insurance investigators, and executes in under two minutes per image. When you upload a RAW, JPEG, PNG, HEIC or TIFF to your dashboard, our ingestion layer first parses every available metadata field — EXIF camera body, lens serial, shutter count, GPS fix, firmware version, ICC profile, and any pre-existing C2PA manifest written by Leica M11-P, Sony Alpha, Nikon Z9, Canon EOS R5 Mark II or Fujifilm X-H2S bodies shipping with native Content Credentials. These signals are preserved as a structured sidecar and feed directly into the forensic scoring engine.

Next, a panel of specialized detectors inspects the pixel data: VAE decoder fingerprint analysis for Stable Diffusion 1.5, SDXL and SD3; latent noise residuals for Midjourney v5, v6 and v7; proprietary heuristics for DALL-E 3, Adobe Firefly, Google Imagen and Flux.1 (Schnell and Pro); and frequency-domain analysis (DCT, wavelet) to catch hybrid retouching. Each detector returns an independent probability, which a meta-classifier fuses into a single human-readable confidence score with a plain-English explanation. According to Sumsub's 2024 Identity Fraud Report, AI-generated content fraud grew by +550% year-over-year, so we continuously retrain these models every six weeks against fresh synthetic datasets scraped from the latest public generators.

Finally, the anchoring layer computes a SHA-256 hash of the original file, writes the hash plus the verdict plus an RFC 3161 timestamp to the Solana blockchain as a Memo instruction, and mirrors the same payload to Arweave for 200+ year permanent storage. Only the hash is published on-chain — never the photo itself — which is how CHECKHC stays compatible with GDPR Article 17 (right to erasure): you can delete your image at any time from our servers while the cryptographic proof remains mathematically bound to a file only you possess. A shareable verification URL is generated immediately so you can embed it in portfolios, contest entries, press releases or lawsuit exhibits. See our multi-model AI detector, GDPR-compliant image storage and newsroom photo verification pages for the full stack.

Three Concrete Scenarios Where Pre-Certification Saved Careers

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Scenario 1 — Landscape Photographer Accused on Instagram

A Patagonia sunrise shot, captured after a three-day hike and edited for two hours in Lightroom, was mass-reported as "obvious AI" on Instagram in late 2024. Because the photographer had certified the RAW immediately after import, a single verification link shared in the comments reversed the shadowban within 48 hours. Cost of protection: less than the price of a coffee per shoot.

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Scenario 2 — International Contest Entry

A portrait photographer submitted to a top-five international contest that now requires proof of human creation under its 2025 revised rules. Rather than risk disqualification, every shortlist candidate was pre-certified on CHECKHC and submitted with the verification URL attached. The jury confirmed receipt without a single follow-up question — a process that used to require sending RAW files and receiving skeptical emails.

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Scenario 3 — Copyright Dispute on Stock Platform

An editorial photographer discovered their image being resold under a competitor's name on a major stock site. The CHECKHC Solana timestamp predated the infringing upload by eleven months, and the Arweave-anchored hash served as cryptographic priority evidence. The stock platform took the infringing listing down within 72 hours — no lawyer, no court, no lengthy DMCA back-and-forth.

Why Creators Trust CHECKHC

"After being accused of using AI on a landscape photo I spent days planning and hiking to capture, I knew I needed proof. Now I certify everything before posting."

Landscape Photographer
Professional Creator

"A contest almost rejected my entry because they thought it was AI. I showed them my CHECKHC certification and won second place. Proof matters."

Portrait Photographer
Competition Winner

Silence the Doubters Forever

Get proof that your work is authentically yours. Certify before you publish.

Prove Your Work is Real

10 free certifications • Instant blockchain proof

View Individual Plans → View Business Plans →

Frequently Asked Questions

How does CHECKHC certification actually prove my photo is not AI-generated? +
The proof is built on three independent layers. First, a panel of specialized detectors scores your image against VAE fingerprints, latent noise residuals and frequency-domain artifacts left by Midjourney v5/v6/v7, DALL-E 3, Stable Diffusion 1.5/SDXL/SD3, Flux.1 Schnell/Pro, Adobe Firefly and Google Imagen. Second, every piece of camera metadata (EXIF body, lens, shutter count, GPS, any native C2PA manifest from Leica/Sony/Nikon/Canon/Fujifilm) is preserved in the certificate. Third, a SHA-256 hash of the file plus the verdict is written to Solana and Arweave. A third party can re-hash your file years later and mathematically verify it matches the on-chain record — no trust in CHECKHC required.
What happens if my heavily edited photo triggers a false positive? +
Aggressive Lightroom presets, frequency separation skin retouching, composite focus stacks and extreme HDR merges can occasionally push borderline scores. CHECKHC always returns a full per-detector breakdown — you see each model's probability, not just a yes/no. If the meta-classifier reports "inconclusive", you can attach your RAW file, PSD layer stack or sidecar XMP history and request a manual review. In practice, most "false positives" disappear as soon as the RAW is submitted alongside the exported JPEG, because the RAW carries sensor-level signals no diffusion model can fake.
Should I certify before or after publishing on social media? +
Always before. Certifying a fresh RAW the moment it comes off your card creates the earliest possible Solana timestamp — which is the decisive evidence in any future dispute. If you wait until after accusations arise, a skeptic can correctly point out that you could have cleaned or regenerated the file in the meantime. Pre-publication certification takes under two minutes, costs a fraction of a euro per shot on the Individual plans, and completely removes the "but when did you certify?" attack vector. Think of it as the digital equivalent of mailing yourself a sealed envelope.
How do I share proof with skeptics, contest juries or clients? +
Each certification generates a permanent verification URL hosted on checkhc.net. That single link displays the original filename hash, the Solana transaction signature, the Arweave permanent URL, the per-model detection scores, the extracted EXIF/C2PA metadata and an RFC 3161 timestamp. You can paste it into Instagram comments, attach it to stock-agency submissions, embed it in a contest entry form, or drop it into a client invoice PDF. For higher-volume creators, our API returns a short share code you can append to your existing portfolio URLs — for example portfolio.com/photo?verify=a1b2c3.
Is the blockchain proof admissible in a real copyright dispute? +
The Solana signature and Arweave hash provide what lawyers call "priority evidence": mathematically incontestable proof that a specific file existed at a specific UTC timestamp. Under both the Berne Convention and EU Directive 2019/790, copyright arises at the moment of creation — not at registration — so any evidence that pins the creation date is probative. CHECKHC is operated by a French SAS (SIREN 994 183 275) based in Rochefort and governed by French commercial law, which means European creators benefit from a jurisdiction that already recognises blockchain timestamps under the PACTE law. Stock platforms, the WIPO Arbitration Center and most national IP offices accept the verification URL as supporting documentation.
Does CHECKHC work with cameras that already ship with C2PA Content Credentials? +
Yes, and it complements them rather than replacing them. Leica M11-P, Sony Alpha (α1 II, α9 III, α7R V via firmware), Nikon Z9/Z8, Canon EOS R5 Mark II and Fujifilm X-H2S now write a signed C2PA manifest directly into the file at capture time. CHECKHC reads that manifest, validates the signing certificate against the Coalition for Content Provenance and Authenticity trust list, and adds a second independent layer: blockchain anchoring plus multi-model AI detection. This is important because a native C2PA manifest can be stripped by a social platform during re-upload — but the Solana hash cannot be removed once it is written.
How does this stay GDPR-compliant if blockchains are immutable? +
CHECKHC only writes a SHA-256 hash — a 64-character fingerprint — to Solana and Arweave. Your actual photo never leaves our GDPR-compliant servers (or your own storage, if you use the API with local hashing). If you invoke your right to erasure under Article 17, we delete the photo and all associated personal data from our infrastructure. The on-chain hash remains, but it is cryptographically meaningless without the file that produced it, so it contains zero personal data according to CNIL's 2018 guidance on blockchain and GDPR. This is exactly how CHECKHC reconciles "permanent proof" with "right to be forgotten". See our dedicated GDPR image storage page for the legal analysis.
What does it cost to certify an entire portfolio or a busy shooting year? +
New accounts receive 10 free certifications to test the pipeline end-to-end. After that, Individual plans start below the price of a single printed photo book and scale to several hundred certifications per month; Business plans include API access, bulk upload and WordPress/Ghost/Contentful connectors for 99€/month with 300 monthly certifications. Wedding, sports and editorial photographers routinely certify several thousand keepers per year at a cost far below what a single copyright lawsuit — or a single lost contest placement — would cost them. See individual plans and business plans for detailed pricing.