Cross-source identifiers
Every current identifier attachment, with the link method and confidence carried verbatim — deterministic links are 1.000; probabilistic links surface their real matcher confidence, never rounded up.
| Scheme | Value | Source table | Link method | Confidence | Since | Provenance |
|---|---|---|---|---|---|---|
| pac_id | 0840520888 | snf_all_owners | deterministic_pac_in_all_owners | 1.000 | 2026-06-14 | evidencerecorded: 2026-06-14 methodology: entity-graph/v1 evidence: {"rule":"D-OWNER","source_pk":209293,"type_owner":"I","enrollment_id":"O20210513001905"} |
Graph edges
One-hop relationships — ownership, chain membership, operation — each backed by a federal source row.
| Relationship | Entity | Confidence | Source table | Provenance |
|---|---|---|---|---|
| owns → | WEST WHARTON COUNTY HOSPITAL DISTRICT (TX) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-14 methodology: entity-graph/v1 attributes: {"role_code":"40","association_date":"05/01/2021","percentage_ownership":0} evidence: {"rule":"D-OWNER","owner_pac":"0840520888","source_pk":209293,"type_owner":"I","enrollment_id":"O20210513001905","role_code_owner":"40","role_text_owner":"CORPORATE OFFICER","dst_resolved_via":"pac_id","percentage_ownership_raw":0,"enrollment_organization_name":"WEST WHARTON COUNTY HOSPITAL DISTRICT"} |
| owns → | WEST WHARTON COUNTY HOSPITAL DISTRICT (TX) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-14 methodology: entity-graph/v1 attributes: {"role_code":"40","association_date":"05/17/2021","percentage_ownership":100} evidence: {"rule":"D-OWNER","owner_pac":"0840520888","source_pk":253507,"type_owner":"I","enrollment_id":"O20240426001317","role_code_owner":"40","role_text_owner":"CORPORATE OFFICER","dst_resolved_via":"pac_id","percentage_ownership_raw":100,"enrollment_organization_name":"WEST WHARTON COUNTY HOSPITAL DISTRICT"} |
| owns → | WEST WHARTON COUNTY HOSPITAL DISTRICT (TX) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-14 methodology: entity-graph/v1 attributes: {"role_code":"40","association_date":"05/17/2021","percentage_ownership":0} evidence: {"rule":"D-OWNER","owner_pac":"0840520888","source_pk":254246,"type_owner":"I","enrollment_id":"O20240523000524","role_code_owner":"40","role_text_owner":"CORPORATE OFFICER","dst_resolved_via":"pac_id","percentage_ownership_raw":0,"enrollment_organization_name":"WEST WHARTON COUNTY HOSPITAL DISTRICT"} |
| owns → | WEST WHARTON COUNTY HOSPITAL DISTRICT (TX) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"40","association_date":"05/01/2021","percentage_ownership":0} evidence: {"rule":"D-OWNER","owner_pac":"0840520888","source_pk":209293,"type_owner":"I","enrollment_id":"O20210513001905","role_code_owner":"40","role_text_owner":"CORPORATE OFFICER","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":0,"enrollment_organization_name":"WEST WHARTON COUNTY HOSPITAL DISTRICT"} |
| owns → | WEST WHARTON COUNTY HOSPITAL DISTRICT (TX) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"40","association_date":"05/18/2021","percentage_ownership":100} evidence: {"rule":"D-OWNER","owner_pac":"0840520888","source_pk":209406,"type_owner":"I","enrollment_id":"O20210517000310","role_code_owner":"40","role_text_owner":"CORPORATE OFFICER","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":100,"enrollment_organization_name":"WEST WHARTON COUNTY HOSPITAL DISTRICT"} |
| owns → | WEST WHARTON COUNTY HOSPITAL DISTRICT (TX) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"40","association_date":"05/18/2021","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"0840520888","source_pk":209530,"type_owner":"I","enrollment_id":"O20210518002548","role_code_owner":"40","role_text_owner":"CORPORATE OFFICER","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"WEST WHARTON COUNTY HOSPITAL DISTRICT"} |
| owns → | WEST WHARTON COUNTY HOSPITAL DISTRICT (TX) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"40","association_date":"05/18/2021","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"0840520888","source_pk":212376,"type_owner":"I","enrollment_id":"O20210813001816","role_code_owner":"40","role_text_owner":"CORPORATE OFFICER","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"WEST WHARTON COUNTY HOSPITAL DISTRICT"} |
| owns → | WEST WHARTON COUNTY HOSPITAL DISTRICT (TX) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"40","association_date":"04/01/2022","percentage_ownership":100} evidence: {"rule":"D-OWNER","owner_pac":"0840520888","source_pk":220659,"type_owner":"I","enrollment_id":"O20220503001308","role_code_owner":"40","role_text_owner":"CORPORATE OFFICER","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":100,"enrollment_organization_name":"WEST WHARTON COUNTY HOSPITAL DISTRICT"} |
| owns → | WEST WHARTON COUNTY HOSPITAL DISTRICT (TX) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"40","association_date":"04/01/2022","percentage_ownership":100} evidence: {"rule":"D-OWNER","owner_pac":"0840520888","source_pk":221288,"type_owner":"I","enrollment_id":"O20220513000592","role_code_owner":"40","role_text_owner":"CORPORATE OFFICER","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":100,"enrollment_organization_name":"WEST WHARTON COUNTY HOSPITAL DISTRICT"} |
| owns → | WEST WHARTON COUNTY HOSPITAL DISTRICT (TX) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"40","association_date":"05/01/2020","percentage_ownership":0} evidence: {"rule":"D-OWNER","owner_pac":"0840520888","source_pk":221381,"type_owner":"I","enrollment_id":"O20220516001605","role_code_owner":"40","role_text_owner":"CORPORATE OFFICER","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":0,"enrollment_organization_name":"WEST WHARTON COUNTY HOSPITAL DISTRICT"} |
| owns → | WEST WHARTON COUNTY HOSPITAL DISTRICT (TX) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"40","association_date":"05/01/2022","percentage_ownership":0} evidence: {"rule":"D-OWNER","owner_pac":"0840520888","source_pk":221900,"type_owner":"I","enrollment_id":"O20220606000101","role_code_owner":"40","role_text_owner":"CORPORATE OFFICER","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":0,"enrollment_organization_name":"WEST WHARTON COUNTY HOSPITAL DISTRICT"} |
| owns → | WEST WHARTON COUNTY HOSPITAL DISTRICT (TX) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"40","association_date":"05/17/2021","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"0840520888","source_pk":222552,"type_owner":"I","enrollment_id":"O20220622000988","role_code_owner":"40","role_text_owner":"CORPORATE OFFICER","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"WEST WHARTON COUNTY HOSPITAL DISTRICT"} |
| owns → | WEST WHARTON COUNTY HOSPITAL DISTRICT (TX) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"40","association_date":"05/01/2022","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"0840520888","source_pk":222568,"type_owner":"I","enrollment_id":"O20220623002385","role_code_owner":"40","role_text_owner":"CORPORATE OFFICER","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"WEST WHARTON COUNTY HOSPITAL DISTRICT"} |
| owns → | WEST WHARTON COUNTY HOSPITAL DISTRICT (TX) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"40","association_date":"04/01/2022","percentage_ownership":100} evidence: {"rule":"D-OWNER","owner_pac":"0840520888","source_pk":222652,"type_owner":"I","enrollment_id":"O20220627003136","role_code_owner":"40","role_text_owner":"CORPORATE OFFICER","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":100,"enrollment_organization_name":"WEST WHARTON COUNTY HOSPITAL DISTRICT"} |
| owns → | WEST WHARTON COUNTY HOSPITAL DISTRICT (TX) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"40","association_date":"05/17/2021","percentage_ownership":0} evidence: {"rule":"D-OWNER","owner_pac":"0840520888","source_pk":222814,"type_owner":"I","enrollment_id":"O20220701001192","role_code_owner":"40","role_text_owner":"CORPORATE OFFICER","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":0,"enrollment_organization_name":"WEST WHARTON COUNTY HOSPITAL DISTRICT"} |
| owns → | WEST WHARTON COUNTY HOSPITAL DISTRICT (TX) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"40","association_date":"05/17/2021","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"0840520888","source_pk":222861,"type_owner":"I","enrollment_id":"O20220705000676","role_code_owner":"40","role_text_owner":"CORPORATE OFFICER","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"WEST WHARTON COUNTY HOSPITAL DISTRICT"} |
| owns → | WEST WHARTON COUNTY HOSPITAL DISTRICT (TX) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"40","association_date":"05/17/2021","percentage_ownership":0} evidence: {"rule":"D-OWNER","owner_pac":"0840520888","source_pk":222888,"type_owner":"I","enrollment_id":"O20220705001182","role_code_owner":"40","role_text_owner":"CORPORATE OFFICER","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":0,"enrollment_organization_name":"WEST WHARTON COUNTY HOSPITAL DISTRICT"} |
| owns → | WEST WHARTON COUNTY HOSPITAL DISTRICT (TX) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"40","association_date":"05/17/2021","percentage_ownership":0} evidence: {"rule":"D-OWNER","owner_pac":"0840520888","source_pk":222895,"type_owner":"I","enrollment_id":"O20220705002860","role_code_owner":"40","role_text_owner":"CORPORATE OFFICER","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":0,"enrollment_organization_name":"WEST WHARTON COUNTY HOSPITAL DISTRICT"} |
| owns → | WEST WHARTON COUNTY HOSPITAL DISTRICT (TX) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"40","association_date":"05/17/2021","percentage_ownership":0} evidence: {"rule":"D-OWNER","owner_pac":"0840520888","source_pk":223400,"type_owner":"I","enrollment_id":"O20220714001236","role_code_owner":"40","role_text_owner":"CORPORATE OFFICER","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":0,"enrollment_organization_name":"WEST WHARTON COUNTY HOSPITAL DISTRICT"} |
| owns → | WEST WHARTON COUNTY HOSPITAL DISTRICT (TX) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"40","association_date":"05/17/2021","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"0840520888","source_pk":227132,"type_owner":"I","enrollment_id":"O20221011002160","role_code_owner":"40","role_text_owner":"CORPORATE OFFICER","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"WEST WHARTON COUNTY HOSPITAL DISTRICT"} |
| owns → | WEST WHARTON COUNTY HOSPITAL DISTRICT (TX) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"40","association_date":"05/17/2021","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"0840520888","source_pk":227157,"type_owner":"I","enrollment_id":"O20221012002492","role_code_owner":"40","role_text_owner":"CORPORATE OFFICER","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"WEST WHARTON COUNTY HOSPITAL DISTRICT"} |
| owns → | WEST WHARTON COUNTY HOSPITAL DISTRICT (TX) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"40","association_date":"05/17/2021","percentage_ownership":0} evidence: {"rule":"D-OWNER","owner_pac":"0840520888","source_pk":228241,"type_owner":"I","enrollment_id":"O20221109001444","role_code_owner":"40","role_text_owner":"CORPORATE OFFICER","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":0,"enrollment_organization_name":"WEST WHARTON COUNTY HOSPITAL DISTRICT"} |
| owns → | WEST WHARTON COUNTY HOSPITAL DISTRICT (TX) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"40","association_date":"05/17/2021","percentage_ownership":0} evidence: {"rule":"D-OWNER","owner_pac":"0840520888","source_pk":229087,"type_owner":"I","enrollment_id":"O20221213001316","role_code_owner":"40","role_text_owner":"CORPORATE OFFICER","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":0,"enrollment_organization_name":"WEST WHARTON COUNTY HOSPITAL DISTRICT"} |
| owns → | WEST WHARTON COUNTY HOSPITAL DISTRICT (TX) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"40","association_date":"05/17/2021","percentage_ownership":0} evidence: {"rule":"D-OWNER","owner_pac":"0840520888","source_pk":229094,"type_owner":"I","enrollment_id":"O20221213001404","role_code_owner":"40","role_text_owner":"CORPORATE OFFICER","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":0,"enrollment_organization_name":"WEST WHARTON COUNTY HOSPITAL DISTRICT"} |
| owns → | WEST WHARTON COUNTY HOSPITAL DISTRICT (TX) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"40","association_date":"05/17/2021","percentage_ownership":0} evidence: {"rule":"D-OWNER","owner_pac":"0840520888","source_pk":229876,"type_owner":"I","enrollment_id":"O20230110000410","role_code_owner":"40","role_text_owner":"CORPORATE OFFICER","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":0,"enrollment_organization_name":"WEST WHARTON COUNTY HOSPITAL DISTRICT"} |
| owns → | WEST WHARTON COUNTY HOSPITAL DISTRICT (TX) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"40","association_date":"05/17/2021","percentage_ownership":0} evidence: {"rule":"D-OWNER","owner_pac":"0840520888","source_pk":233367,"type_owner":"I","enrollment_id":"O20230323001616","role_code_owner":"40","role_text_owner":"CORPORATE OFFICER","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":0,"enrollment_organization_name":"WEST WHARTON COUNTY HOSPITAL DISTRICT"} |
| owns → | WEST WHARTON COUNTY HOSPITAL DISTRICT (TX) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"40","association_date":"05/17/2021","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"0840520888","source_pk":234116,"type_owner":"I","enrollment_id":"O20230405001267","role_code_owner":"40","role_text_owner":"CORPORATE OFFICER","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"WEST WHARTON COUNTY HOSPITAL DISTRICT"} |
| owns → | WEST WHARTON COUNTY HOSPITAL DISTRICT (TX) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"40","association_date":"05/17/2021","percentage_ownership":0} evidence: {"rule":"D-OWNER","owner_pac":"0840520888","source_pk":243867,"type_owner":"I","enrollment_id":"O20231003003616","role_code_owner":"40","role_text_owner":"CORPORATE OFFICER","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":0,"enrollment_organization_name":"WEST WHARTON COUNTY HOSPITAL DISTRICT"} |
| owns → | WEST WHARTON COUNTY HOSPITAL DISTRICT (TX) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"40","association_date":"05/17/2021","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"0840520888","source_pk":251554,"type_owner":"I","enrollment_id":"O20240314001711","role_code_owner":"40","role_text_owner":"CORPORATE OFFICER","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"WEST WHARTON COUNTY HOSPITAL DISTRICT"} |
| owns → | WEST WHARTON COUNTY HOSPITAL DISTRICT (TX) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"40","association_date":"05/17/2021","percentage_ownership":100} evidence: {"rule":"D-OWNER","owner_pac":"0840520888","source_pk":253507,"type_owner":"I","enrollment_id":"O20240426001317","role_code_owner":"40","role_text_owner":"CORPORATE OFFICER","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":100,"enrollment_organization_name":"WEST WHARTON COUNTY HOSPITAL DISTRICT"} |
| owns → | WEST WHARTON COUNTY HOSPITAL DISTRICT (TX) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"40","association_date":"05/17/2021","percentage_ownership":100} evidence: {"rule":"D-OWNER","owner_pac":"0840520888","source_pk":253931,"type_owner":"I","enrollment_id":"O20240509000460","role_code_owner":"40","role_text_owner":"CORPORATE OFFICER","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":100,"enrollment_organization_name":"WEST WHARTON COUNTY HOSPITAL DISTRICT"} |
| owns → | WEST WHARTON COUNTY HOSPITAL DISTRICT (TX) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"40","association_date":"05/17/2021","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"0840520888","source_pk":253939,"type_owner":"I","enrollment_id":"O20240509000965","role_code_owner":"40","role_text_owner":"CORPORATE OFFICER","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"WEST WHARTON COUNTY HOSPITAL DISTRICT"} |
| owns → | WEST WHARTON COUNTY HOSPITAL DISTRICT (TX) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"40","association_date":"05/17/2021","percentage_ownership":0} evidence: {"rule":"D-OWNER","owner_pac":"0840520888","source_pk":254246,"type_owner":"I","enrollment_id":"O20240523000524","role_code_owner":"40","role_text_owner":"CORPORATE OFFICER","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":0,"enrollment_organization_name":"WEST WHARTON COUNTY HOSPITAL DISTRICT"} |
| owns → | WEST WHARTON COUNTY HOSPITAL DISTRICT (TX) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"40","association_date":"05/17/2021","percentage_ownership":0} evidence: {"rule":"D-OWNER","owner_pac":"0840520888","source_pk":258110,"type_owner":"I","enrollment_id":"O20240822003698","role_code_owner":"40","role_text_owner":"CORPORATE OFFICER","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":0,"enrollment_organization_name":"WEST WHARTON COUNTY HOSPITAL DISTRICT"} |
| owns → | WEST WHARTON COUNTY HOSPITAL DISTRICT (TX) | 1.000 | snf_all_owners | evidencerecorded: 2026-06-16 methodology: entity-graph/v1 attributes: {"role_code":"40","association_date":"12/01/2023","percentage_ownership":null} evidence: {"rule":"D-OWNER","owner_pac":"0840520888","source_pk":269699,"type_owner":"I","enrollment_id":"O20250416003136","role_code_owner":"40","role_text_owner":"CORPORATE OFFICER","dst_resolved_via":"pecos_enrlmt_id","percentage_ownership_raw":null,"enrollment_organization_name":"WEST WHARTON COUNTY HOSPITAL DISTRICT"} |
Current record
Current claims returned for this entity, grouped by provenance subject. The table exposes the source identifier recorded for each claim.
Point-in-time
Query retained claim coordinates under bitemporal-read/v1. Most facts have no superseded row; dates outside retained coverage may return no prior version, and diffs require both coordinates.
Pick a date to reconstruct, or two dates to diff. Equivalent JSON: /api/v1/history/{subject_type}/{subject_id}?at=… and …/diff?from=…&to=…