Maps caller-declared FR Y-9C Schedule HC line items into Schedule totals using the BHCK consolidated-holding-company MDRM prefix (BHCK2170 Total assets, BHCK2948 Total liabilities, BHCK3210 Total equity capital — the same underlying MDRM item numbers as the Call Report Schedule RC), then checks the balance-sheet identity — Total assets == Total liabilities + Total equity capital — within a caller-set rounding tolerance. Y-9C panel: top-tier bank holding companies, total consolidated assets ≥ $3B. No public XBRL edit taxonomy exists for Y-9C — this mapping is hand-encoded from FR Y-9C instruction text. Feeds ART-436 Schedule HC-R.