Certificate verified
Certificate integrity · ISSUED · cert.v2 · GENESIS
The certificate exists, its Ed25519 signature is valid, and it has not been revoked. To check that a specific file matches the artifact recorded in this certificate, use the Verify Your File section below.
Certificate Details
Certificate ID
f5cc0467-9284-4bd3-b778-e2f095db99a3
Issuer
Certified Data LLC
Issued
July 29, 2026 at 11:32 AM UTC
Signature Algorithm
Ed25519
Signing Key ID
ed25519-prod-2025-02
Dataset / Project
Notarized Artifact — 2026-07-29
Verification Checks
Certified Artifact Hashes
ZIP artifact SHA-256 (qa.txt)
dfee409fef79a11e526f5c5fc0afda3181e0a42548e78c3cdd5a084040b7e664
Verify locally without this website:
# Linux / macOS sha256sum dataset.zip # macOS alternative shasum -a 256 dataset.zip # Windows PowerShell Get-FileHash dataset.zip -Algorithm SHA256
The output must match the artifact_hash above. Full verification guide →
Verify Your File
Check artifact integrity
Upload the original artifact file to confirm its SHA-256 matches the fingerprint stored in this certificate. Files are hashed server-side; this is independent of certificate-signature verification above.
What This Certificate Proves
This certificate proves that a synthetic dataset was generated by CertifiedData and its contents match the cryptographic fingerprints recorded at issuance time.
The Ed25519 signature covers the full certificate payload including artifact hashes. Any modification to the ZIP file or inner CSV files will produce a different SHA-256 hash that will not match the certified values.
The certificate does not verify statistical quality or differential privacy unless explicitly stated in the generation metadata.
Trust Path
Registered artifact
Notarized Artifact — 2026-07-29