Annual Custody Review
Annual check that your custody records still match reality — updated signer matrix, storage verification, and gap analysis.
Incheon · Private Treasury Custody
Ledger discipline for wallets kept offline
Structured custody documentation for treasuries that keep their wallets offline — seed ceremony records, signer matrices, and vault location registers prepared for board and auditor review.
What we document
Seed phrase custody ceremonies, hardware wallet inventories, multisig signer roles, and geographic storage locations — formatted for board review and external audit.
Who we serve
Family offices, DAO treasuries, and corporate finance teams in South Korea who hold digital assets in cold storage and need defensible paper trails.
Every cold wallet deserves a custody note that survives personnel changes
When a signatory leaves or a vault location moves, most treasuries discover their records live in one person's notebook. We produce structured custody ledgers that map each offline wallet to its signers, storage site, and recovery procedure — without ever handling private keys.
Established
Toolkit Elm Field has prepared custody documentation for private treasuries since 2019 from our Incheon office.
Response time
Initial scope review within two business days. Full ledger delivery typically within ten business days of receiving your vault inventory.
Custody engagements
Documentation services for offline wallet holdings
Custody Ledger Preparation
A complete custody ledger for your cold storage holdings, prepared from your vault inventory without handling private keys.
Signatory Ceremony Documentation
Witnessed custody ceremony records for new wallet creation, with photographic evidence and signer attestation forms.
Offline Wallet Tracker
Available on the Microsoft Store
From the field notes
Guides on custody practice for private treasuries
Why Your Cold Storage Needs a Custody Ledger Separate from Your Security Setup
A hardware wallet in a safe deposit box is secure. But without a ledger mapping that wallet to its signers and recovery path, your treasury is one personnel change away from confusion.
Documenting a Multisig Ceremony: What Witnesses Should Record
Multisig ceremonies demand more documentation than single-signer wallet creation. Here is what a witnessed record should capture — and what it must never include.
They walked our board through the custody ledger line by line. The multisig signer matrix alone saved us a week of internal back-and-forth, though I wish the initial questionnaire had been shorter.— H.J. Park, Treasury Operations, Seoul-based family office