{"schema_version":"secwatch.filing_event.v1","accession":"0001493152-25-003545","form_type":"8-K","ticker":"PUBC","cik":"0001575858","company_name":"Purebase Corp","filed_at":"2025-01-24T23:59:59+00:00","discovered_at":"2026-05-14T18:03:04.047010+00:00","generated_at":"2026-05-27T10:58:59.254726+00:00","sec_items":["8.01"],"event_type":"other_material","sentiment":"negative","materiality_score":0.8,"calibrated_materiality_score":0.8,"confidence":"high","headline":"Purebase discloses mineral lease assignment from USMC never effectuated; rights remain with USMC","bullets":["Purebase previously reported acquiring mining rights to ~2,500 acres in Esmeralda County, NV via assignment from U.S. Mine Corp. (USMC).","Company now aware the assignment was not effectuated; lease rights and obligations remain with USMC, a significant stockholder.","Purebase had assumed annual lease payments and development costs; implications for title and liability are uncertain.","Disclosure raises material questions about the company's control of the Esmeralda Project and ongoing lease commitments."],"urls":{"canonical":"https://secwatch.observer/filing/0001493152-25-003545","json":"https://secwatch.observer/filing/0001493152-25-003545.json","markdown":"https://secwatch.observer/filing/0001493152-25-003545.md","text":"https://secwatch.observer/filing/0001493152-25-003545.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1575858/000149315225003545/0001493152-25-003545-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1575858/000149315225003545/form8-k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-27T10:58:59.254726+00:00"},"review":{"review_status":"machine_generated","human_reviewed":false,"corrected":false,"correction_note":null,"correction_timestamp":null,"superseded_by":null,"related_filings":[]},"source_grounded_claims":[],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}