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DINOv2 ViT-B/14 frozen + linear probe

LIVE

The signed evidence record for dinov2_probe. Everything below was read out of the passport file; the signature was checked when this page was built, by the same code the Verify button runs.

SIGNATURE VALIDexit 0signature valid, issued by NakedSignal under key ns-passport-2026-07, not expired
SubjectDINOv2 ViT-B/14 frozen + linear probe dinov2_probe
Configuration86.6M frozen, 768-d features, logistic head at 224px
Code fingerprintb444c02112cc
Spec versionMedEval-1 v0.1
Issued2026-08-03T16:03:42Z by NakedSignal
Expires2026-09-20T00:00:00Zthe sealed held-out generation this evidence cycle is anchored to (gen2, set hash ad30d214daa285c5...) is published to expire 2026-09-20; per spec, a passport lapses when its generation retires or its spec version is superseded, whichever comes first
key ns-passport-2026-07 · Ed25519

The check runs against the public key published on the governance page, using your browser's own Ed25519 implementation. The exit code shown is the exit code verify_passport.py returns for the same document.

Measured by NakedSignal

Computed in this repo by the MedEval-1 harness on data the model had never seen. Every number below was copied out of a file the harness wrote — 17 of them, each listed with its SHA-256 at the foot of this panel — and is printed exactly as it was signed, not re-rounded for display.

TaskDomainn testaccuracycalibrationuncertaintysubgroupcorruptionacquisitionlimited datacostspec sensitivityIndex
bloodmnist_224medicine342196.65455294.04374599.67692893.88107680.26760498.19032289.624129100n/a93.436296
bloodmnistmedicine342190.29362778.54193398.48822380.68410560.49320477.53205272.644198100n/a79.922722
breastmnist_224medicine15664.41102853.29764292.24253242.85714367.87103985.55123267.833982100n/a67.90145
breastmnistmedicine15654.63659146.12506286.3394328.57142949.83617360.09174373.623853100n/a55.731512
dermamnist_224medicine200551.76076324.2572490.58779622.22222260.04357289.16215881.507091100n/a59.10506
dermamnistmedicine200543.40192223.12009585.28695421.52466448.33165266.90752178.993371100n/a50.46851
organcmnist_224medicine821679.77714254.94041495.22097460.50894175.60544192.94065480.701976100n/a77.549999
organcmnistmedicine821679.42851840.74530695.3589457.33149974.79757881.83439977.819244100n/a72.697075
pneumoniamnist_224medicine62476.15384665.95980195.32099153.84615455.34712275.58548493.714927100n/a72.363705
pneumoniamnistmedicine62464.27350444.91160191.58684931.62393258.84625154.8138393.75100n/a60.627436
retinamnist_224medicine40038.017388069.846686.2554.7573881.46414287.519339100n/a47.823526
retinamnistmedicine40018.21817050.528211037.91191152.18975389.976172100n/a33.600464

Cross-site retention

not measured for this subject — it is only defined within a family of tasks that share a corpus and differ in acquisition, and this model was not run on one.

Private held-out track

this subject was not submitted to a sealed generation.

Known limitations

Subgroup metadataabsent on 12 of 12 corpora, so the subgroup score falls back to the worst diagnostic class. That absence is a disclosure, not a pass.
Training set cappedyes on at least one task — see the raw JSON for which
Observed in deploymentnothing — see the third panel

Audit chain

Bundles re-derived48 of 48
Ledger100 entries, head 6b7b371ff650a8ed, chain intact
Re-run it yourselfpython src/heldout/audit.py 1f66c7719ab3943c6fcc
17 source files, with hashes
results/heldout/audit_report.jsondf460b6d91a6512dfa1e7dc650637fce2b4dd3a1ec32e03446bf6e11f9c597d2
results/heldout/cycle.jsone012b8978457b51b5c31d18d14d2cc92f100731897523306acae19934f943502
results/heldout/manifests/gen1.seal.json91a7adfa29870a0719125cdd48f6dcb149f1f6485ac1cfa104c6e00057ad9b81
results/heldout/manifests/gen2.seal.jsonf61470918a09cf39e074ef14fb7ade4ac3a13d36d9385f18cf9b92e4b5329547
results/heldout/manifests/public.seal.json1a4fd930d2e781ac7163483990f15d6694e28e507d1b3ca009ff09395e47497c
results/records/bloodmnist_224__dinov2_probe.json9696e66a4c02dd918e7a4064b01a340bb54de9428968f2f695038989a4b8832d
results/records/bloodmnist__dinov2_probe.json02ca43f68b3ed5004b3fb48e13eef741838cb658643334d181ca2828e4a6f199
results/records/breastmnist_224__dinov2_probe.json25be5bb66d81d586d17362956d8977a45bfa16e5749a11f3923f2c0c40da6b13
results/records/breastmnist__dinov2_probe.json1425e89ce23188a16848941ff0888fc2dc00f54f496b6a84410086c81d39de57
results/records/dermamnist_224__dinov2_probe.jsonc3bf1f4a7167f53e302aabdd76347fe3b14d5ce3cb2cb03a8fe33b9466520dca
results/records/dermamnist__dinov2_probe.jsoncfdc01e4a350342f7de63fa2bb0b668b78610fe61fc795b51f7832667be778c6
results/records/organcmnist_224__dinov2_probe.jsonc86807b2fc24a3775f6f9094d0aa9943ee7be5c15b8095984f2a15d30fd31593
results/records/organcmnist__dinov2_probe.jsonc986f9220c1208364447a296bcf835f4e5f971aaa9ea0f31424859dd6abc186c
results/records/pneumoniamnist_224__dinov2_probe.json4704121b5926e866fd9f59a97100ca23c63524e311eb71e0b02824262937cf0c
results/records/pneumoniamnist__dinov2_probe.json2c4304add01189b9692c7638a5de070e7cef9d4ee3012c20022ff141d64548a1
results/records/retinamnist_224__dinov2_probe.json919e11844bfbc01ccde6ffb1d89d706d180b6f88b4b0da92f7c5fb566e9a5614
results/records/retinamnist__dinov2_probe.json5b85cf3f195ea0497a10887faff0ba2e01fe70d2fd9609d0e2b78a6b4c3effa1
Declared by vendor

Five fields a vendor asserts about its own product — intended use, forbidden use, training cutoff, regulatory clearances, and who is personally attesting. NakedSignal never fills these in on a vendor's behalf.

No vendor declaration. This is an open reference baseline implemented by NakedSignal, not a commercial product: there is no vendor to assert an intended use or to sign an attestation, so the declared block is null rather than filled in on the vendor's behalf.

Observed in deployment

Production history and drift — how the model has actually behaved since it was deployed, on real traffic.

Not available: this requires continuous monitoring. Production history and drift are observed fields, and nothing is deployed, so there is nothing to observe. The object is present and null on purpose. The shape is the roadmap, not a claim.

Raw JSON — the whole signed document, 92,831 characters
{
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  "form": "RFC 8785 (JCS)-compatible: UTF-8, object keys sorted by code point, no insignificant whitespace, ECMAScript number formatting",
  "signed_over": "the whole document with the `signature` member removed, canonicalised as above and encoded UTF-8"
 },
 "computed": {
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   "audit_command": "python src/heldout/audit.py 1f66c7719ab3943c6fcc",
   "bundles": 48,
   "ledger_entries": 100,
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