{
  "research_date": "2026-09-11",
  "scope": "Documentary research snapshot; unknown values remain null. Not live availability or account testing.",
  "records": [
    {
      "platform": "pspgo",
      "version": "6.61",
      "change": "Improved stability during some functions.",
      "release_date": "2015-01-15",
      "release_date_source_id": "H402",
      "release_region": null,
      "release_date_status": null,
      "release_date_status_reason": null,
      "available_by": null,
      "available_by_region": null,
      "available_by_source_id": null,
      "announcement_date": null,
      "date_note": "Sony explicitly dates this North American release to January 15, 2015. Archived evidence, not a current download check.",
      "status": "documented",
      "evidence_level": "Sony archived support",
      "variants": null,
      "source_ids": [
        "H05",
        "H402"
      ],
      "observed_at": "2026-09-11"
    },
    {
      "platform": "pspgo",
      "version": "6.60",
      "change": "Improved stability; the Music Unlimited companion app required its own update.",
      "release_date": "2011-08-10",
      "release_date_source_id": "H814",
      "release_region": "Technical chronology; regional calendar scope unspecified",
      "release_date_status": null,
      "release_date_status_reason": null,
      "available_by": null,
      "available_by_region": null,
      "available_by_source_id": null,
      "announcement_date": null,
      "date_note": "Retained 6.60 notes do not date its release. Historical service, not current guidance. Exact PSP Go-compatible chronology date: 2011-08-10. Existing Sony notes remain the change source; this is not a current download check.",
      "status": "documented",
      "evidence_level": "Sony archived support",
      "variants": null,
      "source_ids": [
        "H05",
        "H403",
        "H814"
      ],
      "observed_at": "2026-09-11"
    },
    {
      "platform": "pspgo",
      "version": "6.39",
      "change": "Required a PlayStation Network password change after the 2011 outage, improved system-software stability and strengthened system security.",
      "release_date": "2011-05-24",
      "release_date_source_id": "H815",
      "release_region": "Technical chronology; regional calendar scope unspecified",
      "release_date_status": null,
      "release_date_status_reason": null,
      "available_by": null,
      "available_by_region": null,
      "available_by_source_id": null,
      "announcement_date": null,
      "date_note": "The technical chronology dates the PSP Go-compatible release to 2011-05-24 and provides a separate PSP Go download link. This is not a current download or installation recommendation.",
      "status": "documented",
      "evidence_level": "Technical chronology",
      "variants": null,
      "source_ids": [
        "H05",
        "H815"
      ],
      "observed_at": "2026-09-11"
    },
    {
      "platform": "pspgo",
      "version": "6.38",
      "change": "Enabled access to the Qriocity service and improved system-software stability.",
      "release_date": "2011-04-12",
      "release_date_source_id": "H816",
      "release_region": "Technical chronology; regional calendar scope unspecified",
      "release_date_status": null,
      "release_date_status_reason": null,
      "available_by": null,
      "available_by_region": null,
      "available_by_source_id": null,
      "announcement_date": null,
      "date_note": "The technical chronology dates the PSP Go-compatible release to 2011-04-12 and provides a separate PSP Go download link. This is not a current download or installation recommendation.",
      "status": "documented",
      "evidence_level": "Technical chronology",
      "variants": null,
      "source_ids": [
        "H05",
        "H816"
      ],
      "observed_at": "2026-09-11"
    },
    {
      "platform": "pspgo",
      "version": "6.37",
      "change": "Improved system-software stability and patched documented user- and kernel-mode exploits.",
      "release_date": "2011-01-20",
      "release_date_source_id": "H817",
      "release_region": "Technical chronology; regional calendar scope unspecified",
      "release_date_status": null,
      "release_date_status_reason": null,
      "available_by": null,
      "available_by_region": null,
      "available_by_source_id": null,
      "announcement_date": null,
      "date_note": "The technical chronology dates the PSP Go-compatible release to 2011-01-20 and provides a separate PSP Go download link. This is not a current download or installation recommendation.",
      "status": "documented",
      "evidence_level": "Technical chronology",
      "variants": null,
      "source_ids": [
        "H05",
        "H817"
      ],
      "observed_at": "2026-09-11"
    },
    {
      "platform": "pspgo",
      "version": "6.35",
      "change": "Prepared the system for the Qriocity music service and patched a documented saved-game exploit.",
      "release_date": "2010-11-24",
      "release_date_source_id": "H818",
      "release_region": "Technical chronology; regional calendar scope unspecified",
      "release_date_status": null,
      "release_date_status_reason": null,
      "available_by": null,
      "available_by_region": null,
      "available_by_source_id": null,
      "announcement_date": null,
      "date_note": "The technical chronology dates the PSP Go-compatible release to 2010-11-24 and provides a separate PSP Go download link. This is not a current download or installation recommendation.",
      "status": "documented",
      "evidence_level": "Technical chronology",
      "variants": null,
      "source_ids": [
        "H05",
        "H818"
      ],
      "observed_at": "2026-09-11"
    },
    {
      "platform": "pspgo",
      "version": "6.31",
      "change": "Improved stability for certain titles and fixed a Persona 3 Portable standby-resume problem.",
      "release_date": "2010-07-29",
      "release_date_source_id": "H819",
      "release_region": "Technical chronology; regional calendar scope unspecified",
      "release_date_status": null,
      "release_date_status_reason": null,
      "available_by": null,
      "available_by_region": null,
      "available_by_source_id": null,
      "announcement_date": null,
      "date_note": "The technical chronology dates the PSP Go-compatible release to 2010-07-29 and provides a separate PSP Go download link. This is not a current download or installation recommendation.",
      "status": "documented",
      "evidence_level": "Technical chronology",
      "variants": null,
      "source_ids": [
        "H05",
        "H819"
      ],
      "observed_at": "2026-09-11"
    },
    {
      "platform": "pspgo",
      "version": "6.30",
      "change": "Added game-format sorting and PlayStation Plus compatibility, and patched documented saved-game and cheat-device paths.",
      "release_date": "2010-06-29",
      "release_date_source_id": "H820",
      "release_region": "Technical chronology; regional calendar scope unspecified",
      "release_date_status": null,
      "release_date_status_reason": null,
      "available_by": null,
      "available_by_region": null,
      "available_by_source_id": null,
      "announcement_date": null,
      "date_note": "The technical chronology dates the PSP Go-compatible release to 2010-06-29 and provides a separate PSP Go download link. This is not a current download or installation recommendation.",
      "status": "documented",
      "evidence_level": "Technical chronology",
      "variants": null,
      "source_ids": [
        "H05",
        "H820"
      ],
      "observed_at": "2026-09-11"
    },
    {
      "platform": "pspgo",
      "version": "6.20",
      "change": "Supported the Digital Comics reader under Extras. Sony explicitly described the firmware-linked reader as available for all PSP models.",
      "release_date": "2009-11-18",
      "release_date_source_id": "H821",
      "release_region": "Technical chronology; regional calendar scope unspecified",
      "release_date_status": null,
      "release_date_status_reason": null,
      "available_by": "2010-06-23",
      "available_by_region": "North American announcement",
      "available_by_source_id": "H408",
      "announcement_date": "2010-06-23",
      "date_note": "Retrospective availability by June 23, 2010, not the 6.20 release date. This proves the stated reader feature across models, not every PSP feature or identical update files. Retired service, not a current recommendation. Exact PSP Go-compatible chronology date: 2009-11-18. Existing Sony notes remain the change source; this is not a current download check.",
      "status": "documented",
      "evidence_level": "Sony announcement",
      "variants": null,
      "source_ids": [
        "H05",
        "H408",
        "H821"
      ],
      "observed_at": "2026-09-11"
    },
    {
      "platform": "pspgo",
      "version": "6.10",
      "change": "Added PSPgo-specific Bluetooth mobile-phone tethering and SensMe music features; Sony recommended the update for PSP-N1000 compatibility.",
      "release_date": "2009-09-30",
      "release_date_source_id": "H822",
      "release_region": "Technical chronology; regional calendar scope unspecified",
      "release_date_status": null,
      "release_date_status_reason": null,
      "available_by": "2009-10-02",
      "available_by_region": "Italian PSPgo launch announcement",
      "available_by_source_id": "H428",
      "announcement_date": "2009-09-30",
      "date_note": "Explicit PSPgo model support; announcement is not an exact release-date confirmation. Historical phone/service compatibility is not a current recommendation. Sony explicitly confirms 6.10 availability by October 2, 2009 and names PSPgo applicability. The October 1 date elsewhere in the article is the hardware launch, not a proven firmware release date. Historical promotions and tethering compatibility are not current recommendations. Exact PSP Go-compatible chronology date: 2009-09-30. Existing Sony notes remain the change source; this is not a current download check.",
      "status": "documented",
      "evidence_level": "Sony announcement",
      "variants": null,
      "source_ids": [
        "H05",
        "H318",
        "H428",
        "H822"
      ],
      "observed_at": "2026-09-11"
    },
    {
      "platform": "pspgo",
      "version": "6.00",
      "change": "Sony explicitly included PSP-N1000 in the new color options and announced a security patch and the System Update menu rename.",
      "release_date": null,
      "release_date_source_id": null,
      "release_region": null,
      "release_date_status": "not_applicable",
      "release_date_status_reason": "The technical chronology explicitly records that no PSPgo 6.00 release existed.",
      "available_by": null,
      "available_by_region": null,
      "available_by_source_id": null,
      "announcement_date": "2009-09-09",
      "date_note": "Pre-launch PSP-N1000 model reference in an upcoming-update announcement. This does not establish retail availability or an archived PSPgo download. The technical chronology explicitly records that no PSPgo 6.00 release existed.",
      "status": "documented",
      "evidence_level": "Sony announcement",
      "variants": null,
      "source_ids": [
        "H319",
        "H822"
      ],
      "observed_at": "2026-09-11"
    },
    {
      "platform": "pspgo",
      "version": "5.70",
      "change": "Initial PSPgo firmware with PSPgo hardware support.",
      "release_date": null,
      "release_date_source_id": null,
      "release_region": null,
      "release_date_status": "not_applicable",
      "release_date_status_reason": "Factory-installed initial PSPgo firmware; no separate public update release is evidenced.",
      "available_by": "2009-10-01",
      "available_by_region": "PSPgo retail launch availability",
      "available_by_source_id": "H823",
      "announcement_date": null,
      "date_note": "Factory-installed on early PSPgo systems and available with launch hardware by 2009-10-01. This is a hardware availability bound, not a public firmware release date. Factory-installed initial PSPgo firmware; no separate public update release is evidenced.",
      "status": "documented",
      "evidence_level": "Technical chronology",
      "variants": "(Only PSAR)",
      "source_ids": [
        "H05",
        "H823"
      ],
      "observed_at": "2026-09-11"
    }
  ],
  "sources": {}
}