{"schema_version":"secwatch.filing_event.v1","accession":"0001437749-25-011313","form_type":"8-K","ticker":"IBIT","cik":"0001980994","company_name":"iShares Bitcoin Trust ETF","filed_at":"2025-04-08T23:59:59+00:00","discovered_at":"2026-05-14T18:02:50.620504+00:00","generated_at":"2026-05-23T19:12:47.534040+00:00","sec_items":["1.01","9.01"],"event_type":"other_material","sentiment":"neutral","materiality_score":0.45,"calibrated_materiality_score":0.45,"confidence":"high","headline":"iShares Bitcoin Trust adds Anchorage Digital Bank as second bitcoin custodian; Coinbase remains","bullets":["Entered custodial agreement with Anchorage Digital Bank N.A., a national trust bank chartered by OCC, for cold storage custody of bitcoin.","Coinbase remains the primary custodian; no immediate plans to move bitcoin to Anchorage.","Addition reflects Sponsor's risk management and expanding digital asset presence.","Anchorage required to hold private keys in cold storage; agreement covers fork handling and indemnification."],"urls":{"canonical":"https://secwatch.observer/filing/0001437749-25-011313","json":"https://secwatch.observer/filing/0001437749-25-011313.json","markdown":"https://secwatch.observer/filing/0001437749-25-011313.md","text":"https://secwatch.observer/filing/0001437749-25-011313.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1980994/000143774925011313/0001437749-25-011313-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1980994/000143774925011313/bit20250404_8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-23T19:12:47.534040+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"}