Errors in dice-generated recovery phrase lookup table at indices 19, 658, and 1866

[maximusmaximalistus]

Summary

The PDF guide for generating a Jade recovery phrase with dice contains three errors in its 2,048-entry BIP39 lookup table.

Guide:

https://storage.googleapis.com/dxp-production-assets/content/blockstream-jade/add-more-security-functionality/create-a-recovery-phrase-using-dice/JadeDiceRollsGuide.pdf

Canonical BIP39 English word list:

https://github.com/bitcoin/bips/blob/master/bip-0039/english.txt

Incorrect entries

Index	Current entry in PDF	Correct entry	Error
19	D1=1, D2=1, D3=4 — act	D1=1, D2=3, D3=4 — act	Incorrect D2 value
658	D1=6, D2=3, D3=3 — FALSE	D1=6, D2=3, D3=3 — false	Incorrect capitalization
1866	D1=15, D2=10, D3=3 — TRUE	D1=15, D2=10, D3=3 — true	Incorrect capitalization

Details

Index 19

The PDF currently contains:

1  1  4  act  19

It should contain:

1  3  4  act  19

The dice result 1,1,4 is already correctly assigned to index 3, about.

Because of this error:

• 1,1,4 appears twice in the table.
• The valid result 1,3,4 is missing.
• A user who rolls 1,1,4 sees two possible words.
• A user who rolls 1,3,4 cannot find the corresponding entry.

Index 658

The PDF currently contains:

6  3  3  FALSE  658

The canonical BIP39 word is lowercase:

6  3  3  false  658

Index 1866

The PDF currently contains:

15  10  3  TRUE  1866

The canonical BIP39 word is lowercase:

15  10  3  true  1866

BIP39 mnemonic words should match the canonical lowercase word list. The uppercase entries are inconsistent with that list and could cause confusion or validation/import problems in implementations that require exact lowercase input.

Full-table audit

I compared all 2,048 entries in the PDF against the canonical BIP39 English word list and independently recalculated the expected dice coordinates using the zero-based BIP39 index:

D1 = floor(index / 128) + 1
D2 = floor((index mod 128) / 8) + 1
D3 = (index mod 8) + 1

The audit found:

• All indices from 0 through 2047 are present exactly once.
• Every word is assigned to the correct BIP39 index.
• Index 19 is the only incorrect dice-coordinate entry.
• FALSE and TRUE are the only capitalization mismatches.
• No additional spelling, index-assignment, or dice-coordinate errors were found.

Suggested fix

Please update the following three rows in the PDF:

Index 19:
1  3  4  act  19

Index 658:
6  3  3  false  658

Index 1866:
15  10  3  true  1866

AI-assisted audit note

This report was prepared with assistance from OpenAI ChatGPT, GPT-5.6 Thinking, on August 3, 2026 at approximately 00:37 UTC+1.

The audit used the following sources:

• Blockstream Jade dice guide:
  https://storage.googleapis.com/dxp-production-assets/content/blockstream-jade/add-more-security-functionality/create-a-recovery-phrase-using-dice/JadeDiceRollsGuide.pdf
• Canonical BIP39 English word list:
  https://github.com/bitcoin/bips/blob/master/bip-0039/english.txt
• BIP39 specification:
  https://github.com/bitcoin/bips/blob/master/bip-0039.mediawiki

The AI-assisted review compared the 2,048 table entries with the canonical BIP39 English word list and checked the expected dice coordinates using:

D1 = floor(index / 128) + 1
D2 = floor((index mod 128) / 8) + 1
D3 = (index mod 8) + 1

The reported findings were also checked against the surrounding table entries to detect duplicated or missing dice combinations.

This report is intended to help identify and reproduce documentation errors. It is not a formal code review, security audit, or substitute for independent verification by the Jade maintainers. The PDF and source files should be rechecked directly before applying or publishing any corrections.

[bitcoinhelp]

@maximusmaximalistus thanks for the report, just updated - would you mind confirming all looks good now?

[maximusmaximalistus]

Thanks for correcting the guide. I downloaded the updated PDF and reran the full audit against all 2,048 entries in the canonical BIP39 English word list.

The visible table now passes the audit:

• Index 19 visually shows 1 3 4 act 19.
• Index 658 visually shows lowercase false.
• Index 1866 visually shows lowercase true.
• I found no additional visible word, index, capitalization, or dice-coordinate errors.

I did notice one remaining issue with the PDF’s internal text representation. The corrections appear to have been added as replacement text overlays, while the original incorrect text objects remain embedded underneath.

For example:

• The rendered page shows 1 3 4 act 19, but text extraction still returns 1 1 4 act 19.
• The PDF contains both FALSE and a separate lowercase false.
• The PDF contains both TRUE and a separate lowercase true.

This does not affect what a person sees when reading the guide, but it may affect:

• Copying and pasting text from the PDF
• PDF search
• Screen readers and accessibility tools
• Search-engine indexing
• Automated document parsers and validation tools

This may indicate that the final PDF was patched directly rather than regenerated from the original editable source, although the reason cannot be determined from the PDF alone.

It would be preferable to remove the original incorrect text objects and regenerate or re-export the affected pages so that the visible content and extracted text match.

A quick verification can be performed with:

pdftotext -layout JadeDiceRollsGuide.pdf -

[bitcoinhelp]

@maximusmaximalistus thanks for checking on this, we should have this updated again soon with the fix 👍