Verification and change history

Basketball card data updates

This is the release register for BCI's maintained checklist, sales, player-profile, and tool data. Use it to see the verification date, source coverage, current status, and the material reason a dataset changed.

Current releases

Verification register and change notes

Checklist and parallel data

Parallel and checklist catalog

Added Topps Flagship Basketball 2026-27 from the official card-level checklist, with format-specific parallel ladders labeled by source. This targeted update does not represent a fresh audit of every other catalog season or a verified per-card rainbow.

Release history

October 12, 2026Checklist and guide update
Added the official 2026-27 Topps Flagship Basketball checklist and a format-separated parallel guide. The checklist names 300 base cards and 45 rookies; per-card parallel eligibility and pack odds remain open.
September 25, 2026Guide data refresh
The Topps Chrome Update debut-patch guide now includes Flagg's $8.04 million result. Century Legends Epic Signatures Century now displays all four documented serial-number groups: /6, /23, /33 and /100. The full runtime was rebuilt and checked against its retained source data.
August 31, 2026Catalog release
The maintained runtime catalog reached 52 products, 344 season guides, and 5,219 subset records while retaining 833 unique source links.

Last verified: October 12, 2026
Source status: Source inventory retained
Source count: 834 unique retained source links
Coverage: 53 products · 345 seasons · 5,219 subset records

Season and subset records retain their cited checklist or product source. Conflicts and unsupported claims stay in the review pipeline instead of being silently promoted.

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Sales data

All-time basketball card sales

Flagg ranks third, Kobe-LeBron fourth, Harper 17th and Knueppel 24th. Auction results and reported private full-card sales remain distinguished; closed auctions may be included while payment is pending.

Release history

September 25, 2026Record-sale update
Added Flagg's $8.04 million debut patch, Alt's $6,501,840 Kobe-LeBron dual Logoman, Harper's $2.88 million debut patch and Knueppel's $2.34 million debut patch. Ranks now include closed results with payment status retained.
July 19, 2026Sales verification
The Top 25 leaderboard was rechecked with a direct sale-record link on every promoted result and a nine-source archive and reporting inventory.

Last verified: September 25, 2026
Source status: Reported results with sources
Source count: 25 retained sale-source links
Coverage: 25 ranked sales · 25 retained source links

Each Top 25 row retains a venue record or reporting/index source. The new results were checked directly; older retained records were not all freshly reverified in this update. Payment status is distinct from source coverage.

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Sales data

Player sales boards

Six player boards reflect the new Fanatics and Alt results. Source coverage remains visible row by row; 190 retained records lack a linked source. This targeted review does not claim a fresh audit of every historical sale.

Release history

September 25, 2026Sales-board update
Updated Flagg, Kobe, LeBron, Hakeem, Shaq and Chris Paul for qualifying results. Reviewed the latest Alt weekly auction's large sales and included the separate featured Kobe-LeBron result with payment pending. The retained inventory now has 766 linked records of 956.
September 7, 2026Source inventory reconciliation
The retained player-sales inventory contains 764 direct-linked records out of 956 across 97 maintained collections and 94 live boards; 192 records remain source pending.
August 31, 2026Board release
The merged release now powers 94 live player boards from 97 maintained record collections and 956 records. Direct links cover 758 records; the remaining 198 stay visibly marked as source pending.

Last verified: September 25, 2026
Source status: Source coverage in progress
Source count: 766 of 956 records source-linked
Coverage: 94 live player boards · 97 maintained collections · 956 sale records

Direct-source coverage is incomplete. Pending rows remain usable as reported market observations, but the interface distinguishes them from direct-linked evidence.

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Player research

Player card profiles

The October 5 profile evidence overlay covers 156 records; the September 25 Flagg, Harper and Knueppel sale notes remain targeted changes. Neither date implies a fresh market-price check for every player.

Release history

October 5, 2026Profile evidence update
The retained profile evidence overlay covers 156 audited records and 422 distinct external links. This is a source-inventory date, not a fresh price check for every player.
September 25, 2026Targeted record-sale refresh
Flagg's profile now reflects the $8.04 million debut-patch result and treats the $366,000 Sapphire autograph as an earlier benchmark. Harper and Knueppel's Under-25 status notes include their closed auction results; player rankings and recommendation targets were retained.
September 1, 2026Content-quality release
All 660 legacy buy-lane summaries are distinct, normalized repeated eight-word phrase share is 0.9%, and the three explicit consolidation pilots remain preserved.
August 28, 2026Collector-lane audit
The monthly scarce-and-iconic review realigned vintage, Gold, RPA, and trophy roles and refreshed exact-card image evidence for active profiles.
August 5, 2026Methodology update
Entry, Core, Premium, Grail, and Trophy became collector roles; exact-card anchors kept numeric values while family and unique targets moved to price discovery.

Last verified: October 5, 2026
Source status: Evidence overlay audited
Source count: 422 unique external evidence links
Coverage: 156 audited records · 132 full five-lane profiles

The audit overlay retains source URLs for exact-card evidence and keeps unresolved or reference-only cards distinguishable from the written target recommendation.

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Collector tools

Research starts with a player in the Counter or a product in the Parallel & Checklist Guides. My Research remains a separate utility for private saved work.

Release history

September 7, 2026Research tools consolidation
The Tools directory now focuses on Player Card Counter and Parallel & Checklist Guides. Generic tools and buying-plan widgets were retired; historical saves and private research remain available in My Research.
September 5, 2026Tool retirement
The Repeat Sales Explorer and standalone value guide were retired. Sold-comp advice now lives in the New Collector Guide; existing saved sales research remains available in My Research.
September 2, 2026Workflow verification
The tools hub was checked as one nine-workflow collector path spanning card identification, grading math, player checklists, set comparison, repeat-sales research, saved research, player counts, parallel research, and set selection.

Last verified: September 7, 2026
Source status: Methods and inputs checked
Source count: 2 research workflows
Coverage: 2 BCI research tools

Results draw on BCI's mapped card and checklist research. Coverage limits, supporting sources, and published or estimated print runs remain visible in the research pages.

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How to read the register

Dates describe the published scope

A release date means the listed dataset scope was checked and published on that date. It does not imply that every external marketplace, population report, or checklist stops changing afterward.

Corrections

Material fixes stay visible

Report the exact page, card, sale, or checklist row and include a source when possible. Accepted material corrections update this register; cosmetic edits do not reset a dataset's verification date.

Open the correction process →