{"schema_version":"secwatch.filing_event.v1","accession":"0000950170-23-057765","form_type":"8-K","ticker":"GBTC","cik":"0001588489","company_name":"Grayscale Bitcoin Trust ETF","filed_at":"2023-11-02T23:59:59+00:00","discovered_at":"2026-05-14T18:03:29.659839+00:00","generated_at":"2026-06-09T00:20:31.891967+00:00","sec_items":["8.01"],"event_type":"other_material","sentiment":"neutral","materiality_score":0.2,"calibrated_materiality_score":0.2,"confidence":"high","headline":"Grayscale Bitcoin Trust adds Crypto.com to Index Pricing Constituent Exchanges","bullets":["Effective Oct 28, 2023, Crypto.com added to CoinDesk Bitcoin Price Index (XBX).","No exchanges removed during scheduled quarterly review.","Index now uses Coinbase, Kraken, LMAX Digital, Bitstamp, and Crypto.com.","Index Provider may change trading venues at any time; quarterly reviews planned."],"urls":{"canonical":"https://secwatch.observer/filing/0000950170-23-057765","json":"https://secwatch.observer/filing/0000950170-23-057765.json","markdown":"https://secwatch.observer/filing/0000950170-23-057765.md","text":"https://secwatch.observer/filing/0000950170-23-057765.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1588489/000095017023057765/0000950170-23-057765-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1588489/000095017023057765/gbtc-20231028.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-09T00:20:31.891967+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"}