Cornish College of the Arts — June 2021 breach
Clustered 8 filings across 8 jurisdictions · filing window May 6, 2021 → May 23, 2022. View entity profile → Other incidents for this victim →
incident inc_23b11b1cb86b4cce · merged by deterministic · confidence 100%
Litigation Timing
SupplementalRange of discovered_at dates across filings
Time between earliest and latest filing
Not recorded for this incident
Leak precedence · Materiality delta · SEC filing delay — no leak-site claim in this cluster; no SEC 8-K in this cluster.
Sensitive data
identity_governmentIncident timeline
Dashed segments are unestablished, not zero — they fill in as filings merge into this incident.
Member cascade — every filing about this breach
- MAY 6MT AGMT AG noticefirst filing · 323 MT residentsday 0
- MAY 6IN AGIN AG noticestates nationwide total 199,449auto-linkedday 0
- MAY 6WA AGWA AG notice72,139 WA residentsauto-linked+365d
- MAY 6CA AGCA AG noticeno count statedauto-linked+365d
- MAY 6MA AGMA AG notice101 MA residentsauto-linked+365d
- MAY 6ME AGME AG noticestates nationwide total 199,449auto-linked+365d
- MAY 12NH AGNH AG notice19 NH residentsauto-linked+371d
- MAY 23OR AGOR AG noticemost recent · no count statedauto-linked+382d
- Watching for additional filings — new sources merge into this incident automatically.
Roll-up facts — reconciled across members
- Breach window
- Jun 6, 2021 – Jun 10, 2021 MT AG
- Discovered
- Jun 11, 2021WA AGApr 4, 2022MT AG + ME AG + NH AG +1filings disagree on discovery
- Data types
- Education · Financial account · Health (basic) · Identity (basic) · Government ID · PHI · PII MT AG + WA AG + CA AG +3
- Attack vector
- Unauthorized Access MT AG
Each fact cites the member filing that establishes it; when filings conflict, every value shows with its source.
Count reconciliation
per-state reported counts
Nationwide (stated in a filing)
199,449
Sum of filed state slices
72,670· 36.4% of stated
64% of the stated total lives in states whose filings carry no count — the dashed share shrinks as filings land.
State AGs report only their own residents; teal bars show each state's reported slice. The gray US row is the nationwide total reported in a linked filing.
Evidence ladder — rungs this incident occupies
No leak-site claim on record for this incident.
No press coverage linked yet.
Unlocks: discovery date, data types, affected count, compliance clock.
No SEC filing or victim statement yet.
Merge provenance
- Method
- deterministic
- Confidence
- 1.00 · above the 0.85 auto-merge floor
- Audit
- Every link edge records its method, confidence and model + prompt versions (100% is the strongest edge).
Merges are reversible — a wrong link can be detached with its audit trail intact. How merging works.
Filing velocity
Spread
382 days
Cadence
~1 / 54.6d
vs. multi-state median
47.8× slower
About this clustering
DisclosureLens links filings into incidents through layered matchers: deterministic rules (same source document, multistate filings of one breach, tight-window same-victim pairs), a weighted-similarity scorer for cross-source candidates, and an operator review queue for everything uncertain. Each link records its own method and confidence — shown per filing in the timeline below. The system defaults to NOT merging when uncertain, because a false merge (collapsing two unrelated breaches) is more harmful than a false split (showing related filings separately); uncertain pairs route to human review instead of auto-merging. This page states only what the linked filings agree on; each filing's own account stays on its own record, linked from the timeline below.
The weekly clock on records like this one
The Disclosure Clock is a weekly briefing on what landed in the disclosure record, and the gap between the criminals' post and the regulator's filing — measured on the whole record, with the method shown.
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