{
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      "supplied_identity": {
        "name": "Adam Fox",
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        "year": "2019-20",
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        "number": "228",
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      "team_at_issue": "New York Rangers",
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        "card": "228",
        "player": "Adam Fox",
        "team": "New York Rangers",
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    "2018-19-upper-deck-young-guns-205-adam-gaudette-psa-10": {
      "status": "matched_cached_manufacturer_row",
      "supplied_identity": {
        "name": "Adam Gaudette",
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        "year": "2018-19",
        "set": "Upper Deck Series 1",
        "number": "205",
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        "grade": "PSA 10"
      },
      "team_at_issue": "Vancouver Canucks",
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      "original_row": {
        "card": "205",
        "player": "Adam Gaudette",
        "team": "Vancouver Canucks",
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    "2017-18-upper-deck-young-guns-454-adin-hill-psa-10": {
      "status": "matched_cached_manufacturer_row",
      "supplied_identity": {
        "name": "Adin Hill",
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        "set": "Upper Deck Series 2",
        "number": "454",
        "variant": "Young Guns",
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      "team_at_issue": "Arizona Coyotes",
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      "original_row": {
        "card": "454",
        "player": "Adin Hill",
        "team": "Arizona Coyotes",
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      "source": {
        "url": "https://upperdeck.com/checklist/2017-18-upper-deck-series-2-checklist/",
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        "name": "Adrian Kempe",
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      "team_at_issue": "Los Angeles Kings",
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        "card": "210",
        "player": "Adrian Kempe",
        "team": "Los Angeles Kings",
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      "source": {
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        "name": "Alex DeBrincat",
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      "team_at_issue": "Chicago Blackhawks",
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        "card": "221",
        "player": "Alex DeBrincat",
        "team": "Chicago Blackhawks",
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      "source": {
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    "2017-18-upper-deck-young-guns-219-alex-formenton-psa-10": {
      "status": "matched_cached_manufacturer_row",
      "supplied_identity": {
        "name": "Alex Formenton",
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        "year": "2017-18",
        "set": "Upper Deck Series 1",
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      "team_at_issue": "Ottawa Senators",
      "manufacturer_rookie_flag": "Rookie",
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      "original_row": {
        "card": "219",
        "player": "Alex Formenton",
        "team": "Ottawa Senators",
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        "name": "Alex Iafallo",
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      "team_at_issue": "Los Angeles Kings",
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        "name": "Alex Kerfoot",
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        "set": "Upper Deck Series 1",
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      "team_at_issue": "Colorado Avalanche",
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        "player": "Alex Kerfoot",
        "team": "Colorado Avalanche",
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        "name": "Alex Nedeljkovic",
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      "team_at_issue": "Carolina Hurricanes",
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        "player": "Alex Nedeljkovic",
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        "name": "Alexander Nylander",
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      "team_at_issue": "Buffalo Sabres",
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        "player": "Alexander Nylander",
        "team": "Buffalo Sabres",
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        "year": "2017-18",
        "set": "Upper Deck Series 1",
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        "variant": "Young Guns",
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      "team_at_issue": "Boston Bruins",
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        "card": "203",
        "player": "Anders Bjork",
        "team": "Boston Bruins",
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    "2018-19-upper-deck-young-guns-451-andrei-svechnikov-psa-10": {
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        "name": "Andrei Svechnikov",
        "item_type": "trading_card",
        "year": "2018-19",
        "set": "Upper Deck Series 2",
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        "variant": "Young Guns",
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      "team_at_issue": "Carolina Hurricanes",
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        "player": "Andrei Svechnikov",
        "team": "Carolina Hurricanes",
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      "team_at_issue": "Tampa Bay Lightning",
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        "card": "219",
        "player": "Anthony Cirelli",
        "team": "Tampa Bay Lightning",
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      },
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        "name": "Anton Lindholm",
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        "year": "2017-18",
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      "team_at_issue": "Colorado Avalanche",
      "manufacturer_rookie_flag": "Rookie",
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      "original_row": {
        "card": "456",
        "player": "Anton Lindholm",
        "team": "Colorado Avalanche",
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      "original_row": {
        "card": "210",
        "player": "Thomas Bordeleau",
        "team": "San Jose Sharks",
        "rookie_flag": "Rookie"
      },
      "source": {
        "url": "https://upperdeck.com/checklist/2022-23-upper-deck-series-1-checklist/",
        "page_title": "2022-23 Upper Deck Series 1 Checklist - Upper Deck",
        "fetched_at_utc": "2026-11-01T02:45:48Z",
        "sha256": "62c3ae549ddef0943e6e680f6ad5c46e328a9bf1ad088a69a675535dc1cb8c1a",
        "section": "checklist table rows whose Set Name is exactly 'Base Set - Young Guns'",
        "http_status": "200",
        "note": ""
      },
      "match_rationale": "Exact season, series and base Young Guns variant; exact card number and Unicode-normalized player name. No fuzzy matching or Canvas/parallel rows.",
      "scope": "Historical manufacturer checklist metadata, not current team membership, authentication, grade verification or sale evidence.",
      "new_fields": [
        "team_at_issue",
        "manufacturer_rookie_flag",
        "checklist_group"
      ],
      "already_displayed_fields": []
    },
    "2016-17-upper-deck-young-guns-488-thomas-chabot-psa-10": {
      "status": "matched_cached_manufacturer_row",
      "supplied_identity": {
        "name": "Thomas Chabot",
        "item_type": "trading_card",
        "year": "2016-17",
        "set": "Upper Deck Series 2",
        "number": "488",
        "variant": "Young Guns",
        "grade": "PSA 10"
      },
      "team_at_issue": "Senators",
      "manufacturer_rookie_flag": null,
      "checklist_group": "Young Guns Rookie Cards",
      "original_row": {
        "card": "488",
        "player": "Thomas Chabot",
        "team": "Senators"
      },
      "source": {
        "url": "https://upperdeck.com/upper-deck-reveals-2016-17-nhl-upper-deck-series-two-young-guns-young-guns-canvas-checklists/",
        "page_title": "Upper Deck Reveals 2016-17 NHL® Upper Deck Series Two Young Guns & Young Guns Canvas Checklists - Upper Deck",
        "fetched_at_utc": "2026-11-01T02:45:23Z",
        "sha256": "5084106312a603821208c36c1ccf76960bfd85f8bed3e41fd84e34be33231863",
        "section": "Young Guns Rookie Cards table in Upper Deck's Series Two reveal article (upperdeck.com has no formal 2016-17 checklist page; the guessed checklist URLs return 404)",
        "http_status": "200",
        "note": ""
      },
      "match_rationale": "Exact season, series and base Young Guns variant; exact card number and Unicode-normalized player name. No fuzzy matching or Canvas/parallel rows.",
      "scope": "Historical manufacturer checklist metadata, not current team membership, authentication, grade verification or sale evidence.",
      "new_fields": [
        "team_at_issue",
        "checklist_group"
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      "already_displayed_fields": []
    },
    "2020-21-upper-deck-young-guns-227-thomas-harley-psa-10": {
      "status": "matched_cached_manufacturer_row",
      "supplied_identity": {
        "name": "Thomas Harley",
        "item_type": "trading_card",
        "year": "2020-21",
        "set": "Upper Deck Series 1",
        "number": "227",
        "variant": "Young Guns",
        "grade": "PSA 10"
      },
      "team_at_issue": "Dallas Stars",
      "manufacturer_rookie_flag": "Rookie",
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      "original_row": {
        "card": "227",
        "player": "Thomas Harley",
        "team": "Dallas Stars",
        "rookie_flag": "Rookie"
      },
      "source": {
        "url": "https://upperdeck.com/checklist/2020-21-upper-deck-series-1-checklist/",
        "page_title": "2020-21 Upper Deck Series 1 Checklist - Upper Deck",
        "fetched_at_utc": "2026-11-01T02:45:38Z",
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      },
      "match_rationale": "Exact season, series and base Young Guns variant; exact card number and Unicode-normalized player name. No fuzzy matching or Canvas/parallel rows.",
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      "already_displayed_fields": []
    },
    "2020-21-upper-deck-young-guns-482-tim-stutzle-psa-10": {
      "status": "matched_cached_manufacturer_row",
      "supplied_identity": {
        "name": "Tim Stutzle",
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        "year": "2020-21",
        "set": "Upper Deck Series 2",
        "number": "482",
        "variant": "Young Guns",
        "grade": "PSA 10"
      },
      "team_at_issue": "Ottawa Senators",
      "manufacturer_rookie_flag": "Rookie",
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      "original_row": {
        "card": "482",
        "player": "Tim Stutzle",
        "team": "Ottawa Senators",
        "rookie_flag": "Rookie"
      },
      "source": {
        "url": "https://upperdeck.com/checklist/2020-21-upper-deck-series-2-checklist/",
        "page_title": "2020-21 Upper Deck Series 2 Checklist - Upper Deck",
        "fetched_at_utc": "2026-11-01T02:45:41Z",
        "sha256": "c9b45a84b837aef5b53aadfd26b063da1a7bba5c7260dbc29d6d2683335a8cc6",
        "section": "checklist table rows whose Set Name is exactly 'Base Set - Young Guns'",
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      },
      "match_rationale": "Exact season, series and base Young Guns variant; exact card number and Unicode-normalized player name. No fuzzy matching or Canvas/parallel rows.",
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      "already_displayed_fields": []
    },
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      "status": "matched_cached_manufacturer_row",
      "supplied_identity": {
        "name": "Timo Meier",
        "item_type": "trading_card",
        "year": "2016-17",
        "set": "Upper Deck Series 2",
        "number": "479",
        "variant": "Young Guns",
        "grade": "PSA 10"
      },
      "team_at_issue": "Sharks",
      "manufacturer_rookie_flag": null,
      "checklist_group": "Young Guns Rookie Cards",
      "original_row": {
        "card": "479",
        "player": "Timo Meier",
        "team": "Sharks"
      },
      "source": {
        "url": "https://upperdeck.com/upper-deck-reveals-2016-17-nhl-upper-deck-series-two-young-guns-young-guns-canvas-checklists/",
        "page_title": "Upper Deck Reveals 2016-17 NHL® Upper Deck Series Two Young Guns & Young Guns Canvas Checklists - Upper Deck",
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        "section": "Young Guns Rookie Cards table in Upper Deck's Series Two reveal article (upperdeck.com has no formal 2016-17 checklist page; the guessed checklist URLs return 404)",
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        "note": ""
      },
      "match_rationale": "Exact season, series and base Young Guns variant; exact card number and Unicode-normalized player name. No fuzzy matching or Canvas/parallel rows.",
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        "team_at_issue",
        "checklist_group"
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      "already_displayed_fields": []
    },
    "2018-19-upper-deck-young-guns-224-tomas-hyka-psa-10": {
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        "name": "Tomas Hyka",
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        "year": "2018-19",
        "set": "Upper Deck Series 1",
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        "variant": "Young Guns",
        "grade": "PSA 10"
      },
      "team_at_issue": "Vegas Golden Knights",
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      "original_row": {
        "card": "224",
        "player": "Tomas Hyka",
        "team": "Vegas Golden Knights",
        "rookie_flag": "Rookie"
      },
      "source": {
        "url": "https://upperdeck.com/checklist/2018-19-upper-deck-series-1-checklist/",
        "page_title": "2018-19 Upper Deck Series 1 Checklist - Upper Deck",
        "fetched_at_utc": "2026-11-01T02:45:30Z",
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      },
      "match_rationale": "Exact season, series and base Young Guns variant; exact card number and Unicode-normalized player name. No fuzzy matching or Canvas/parallel rows.",
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        "name": "Travis Sanheim",
        "item_type": "trading_card",
        "year": "2017-18",
        "set": "Upper Deck Series 1",
        "number": "214",
        "variant": "Young Guns",
        "grade": "PSA 10"
      },
      "team_at_issue": "Philadelphia Flyers",
      "manufacturer_rookie_flag": "Rookie",
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      "original_row": {
        "card": "214",
        "player": "Travis Sanheim",
        "team": "Philadelphia Flyers",
        "rookie_flag": "Rookie"
      },
      "source": {
        "url": "https://upperdeck.com/checklist/2017-18-upper-deck-series-1-hobby-checklist/",
        "page_title": "2017-18 Upper Deck Series 1 Checklist - Upper Deck",
        "fetched_at_utc": "2026-11-01T02:45:26Z",
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      },
      "match_rationale": "Exact season, series and base Young Guns variant; exact card number and Unicode-normalized player name. No fuzzy matching or Canvas/parallel rows.",
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      "status": "matched_cached_manufacturer_row",
      "supplied_identity": {
        "name": "Trevor Zegras",
        "item_type": "trading_card",
        "year": "2021-22",
        "set": "Upper Deck Series 1",
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        "variant": "Young Guns",
        "grade": "PSA 10"
      },
      "team_at_issue": "Anaheim Ducks",
      "manufacturer_rookie_flag": "Rookie",
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        "card": "232",
        "player": "Trevor Zegras",
        "team": "Anaheim Ducks",
        "rookie_flag": "Rookie"
      },
      "source": {
        "url": "https://upperdeck.com/checklist/2021-22-upper-deck-series-1-checklist/",
        "page_title": "2021-22 Upper Deck Series 1 Checklist - Upper Deck",
        "fetched_at_utc": "2026-11-01T02:45:44Z",
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        "year": "2018-19",
        "set": "Upper Deck Series 2",
        "number": "468",
        "variant": "Young Guns",
        "grade": "PSA 10"
      },
      "team_at_issue": "Boston Bruins",
      "manufacturer_rookie_flag": "Rookie",
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      "original_row": {
        "card": "468",
        "player": "Urho Vaakanainen",
        "team": "Boston Bruins",
        "rookie_flag": "Rookie"
      },
      "source": {
        "url": "https://upperdeck.com/checklist/2018-19-upper-deck-series-2-checklist/",
        "page_title": "2018-19 Upper Deck Series 2 Checklist - Upper Deck",
        "fetched_at_utc": "2026-11-01T02:47:18Z",
        "sha256": "6cb5711c81e29a050cf888cd798b6e27f367d77f9df83ceac49a02ba9bbd1583",
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        "set": "Upper Deck Series 2",
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        "variant": "Young Guns",
        "grade": "PSA 10"
      },
      "team_at_issue": "Carolina Hurricanes",
      "manufacturer_rookie_flag": "Rookie",
      "checklist_group": "Base Set - Young Guns",
      "original_row": {
        "card": "467",
        "player": "Valentin Zykov",
        "team": "Carolina Hurricanes",
        "rookie_flag": "Rookie"
      },
      "source": {
        "url": "https://upperdeck.com/checklist/2017-18-upper-deck-series-2-checklist/",
        "page_title": "2017-18 Upper Deck Series 2 Checklist - Upper Deck",
        "fetched_at_utc": "2026-11-01T02:47:16Z",
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        "variant": "Young Guns",
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      },
      "team_at_issue": "Nashville Predators",
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        "card": "204",
        "player": "Yaroslav Askarov",
        "team": "Nashville Predators",
        "rookie_flag": "Rookie"
      },
      "source": {
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        "grade": "PSA 10"
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      "team_at_issue": "Buffalo Sabres",
      "manufacturer_rookie_flag": "Rookie",
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        "player": "Zach Benson",
        "team": "Buffalo Sabres",
        "rookie_flag": "Rookie"
      },
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        "set": "Upper Deck Series 1",
        "number": "213",
        "variant": "Young Guns",
        "grade": "PSA 10"
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      "team_at_issue": "St. Louis Blues",
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      "original_row": {
        "card": "213",
        "player": "Zach Dean",
        "team": "St. Louis Blues",
        "rookie_flag": "Rookie"
      },
      "source": {
        "url": "https://upperdeck.com/checklist/2024-25-ud-series-1-hockey-checklist/",
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        "fetched_at_utc": "2026-11-01T02:45:57Z",
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        "name": "Zachary Bolduc",
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        "variant": "Young Guns",
        "grade": "PSA 10"
      },
      "team_at_issue": "St. Louis Blues",
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        "card": "201",
        "player": "Zachary Bolduc",
        "team": "St. Louis Blues",
        "rookie_flag": "Rookie"
      },
      "source": {
        "url": "https://upperdeck.com/checklist/2024-25-ud-series-1-hockey-checklist/",
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        "name": "Zack Ostapchuk",
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        "set": "Upper Deck Series 1",
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        "variant": "Young Guns",
        "grade": "PSA 10"
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      "team_at_issue": "Ottawa Senators",
      "manufacturer_rookie_flag": "Rookie",
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        "card": "209",
        "player": "Zack Ostapchuk",
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        "rookie_flag": "Rookie"
      },
      "source": {
        "url": "https://upperdeck.com/checklist/2024-25-ud-series-1-hockey-checklist/",
        "page_title": "2024-25 Upper Deck Series 1 Checklist - Upper Deck",
        "fetched_at_utc": "2026-11-01T02:45:57Z",
        "sha256": "ffff6197dab95ac22ccade5c1641d63ec5bdae7c2bb054e28a88afd6c21f31dc",
        "section": "checklist table rows whose Set Name is exactly 'Base Set - Young Guns'",
        "http_status": "200",
        "note": ""
      },
      "match_rationale": "Exact season, series and base Young Guns variant; exact card number and Unicode-normalized player name. No fuzzy matching or Canvas/parallel rows.",
      "scope": "Historical manufacturer checklist metadata, not current team membership, authentication, grade verification or sale evidence.",
      "new_fields": [
        "team_at_issue",
        "manufacturer_rookie_flag",
        "checklist_group"
      ],
      "already_displayed_fields": []
    }
  },
  "skipped": {
    "2016-17-upper-deck-young-guns-249-william-nylander-psa-10": "No cached manufacturer checklist for exact season/series"
  },
  "coverage": {
    "catalogue": 199,
    "matched": 198,
    "with_new_fields": 198,
    "new_fields": {
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      "manufacturer_rookie_flag": 190,
      "checklist_group": 198
    }
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}