Sample bundle
Browse the catalog and license one trace at a time — standard license, signed manifest, no commitment.
$500/ trace
Browse traces →Licensed training data · for AI labs
Reasoning data from real experts, with a paper trail.
Frontier labs are running out of clean public data, and synthetic chain-of-thought plateaus on hard problems. ExpertMint sources reasoning traces from credentialed senior engineers, captures them on screen and voice, and ships every license with a cryptographic manifest your legal team can defend.
- Verified
- suppliers
- Ed25519-signed
- manifests
- License-clean
- for training
manifest · v1.0.0live verifier
{
"manifest_id": "0x7af2…3e1c",
"trace_id": "trc_01HXY8F4KZ5N3M2",
"supplier_tier":"T1",
"content_hash": "sha256:8bc4…aa17",
"issued_at": "2026-05-07T14:02:11Z",
"license": "standard",
"signature": "ed25519:9e2f…b41c"
}Awaiting signature
Ed25519 · key local-ed25519-5ddc8a67
Canonicalized with RFC 8785 JCS, signed with the platform key published at /.well-known/manifest-keys.json.
Tier T1 / T2 / T3RFC 8785 JCSEd25519 signingAnthropic-gradedPersona-verifiedCloudflare R2License PDF + manifestU.S. supply, GDPR-cleanTier T1 / T2 / T3RFC 8785 JCSEd25519 signingAnthropic-gradedPersona-verifiedCloudflare R2License PDF + manifestU.S. supply, GDPR-clean
How it works
Verify. Capture. License.
One pipeline, three checkpoints, one signed artifact at the end.
Verify
Suppliers pass identity, employer-domain, and tier-grading checks. Tier (T1 / T2 / T3) is disclosed on every listing — no opaque blending of senior and junior reasoning.
Capture
Senior engineers record themselves solving real problems on screen and voice. Every trace is AI-graded for clarity and soundness before it lands in the catalog.
License
You buy a license; we sign it with our platform Ed25519 key. The signed manifest is published, verifiable, and bound to every artifact in the bundle.
The state of AI training data
Triage is the bottleneck. Provenance is the moat.
Three forces are reshaping what counts as usable training data. Each one closes a familiar shortcut. Together they raise the bar on what a defensible corpus looks like.
- Force 01
Scraped public data carries lawsuit risk and shifting fair-use rulings (NYT v. OpenAI).
- Force 02
Synthetic chain-of-thought is plateauing on hard reasoning where real expert judgment still wins.
- Force 03
Mercor and Surge sell engineer hours, not licensable assets — your legal team can't defend a hours-billed engagement.
What you get
License-clean reasoning traces with a signed manifest your legal team can defend in deposition.
Every trace is tied to a verified expert (T1 = FAANG-tier principal — gov-ID + employer-domain + employment-API checked); every license is signed with the platform Ed25519 key published at /.well-known/manifest-keys.json.
The public-data wall hits in 18 months. The labs filling reasoning buckets now own the next moat.
Pricing
Three ways in. One signed bundle out.
Lighthouse pilot
Hand-curated T1 traces in your domain. Two-week delivery. Signed manifest bundle. Built for first-pilot procurement.
$5,00010 traces
Request a pilot →Custom corpus
Volume-priced, domain-targeted corpora with negotiated exclusivity. Quarterly refresh available.
Talk to us
Email founders →Your training run starts with one signed bundle.
Lighthouse pilots are sized for procurement: ten T1 traces, two-week delivery, signed manifest bundle, defensible end-to-end.