Backing anyone can check
The custodian signs daily holdings, and any single position can be proven without publishing the rest.
For tokenized-fund issuers, digital-asset custodians and stablecoin issuers
Answer the trust question before your holders ask it.
Tokenized funds and stablecoins compete on trust. Holders who can check the backing any day, instead of waiting for the next report, have one less reason to leave, and a late or quietly revised report is exactly what shakes confidence.
Is every token backed? treasuries and reserves
The custodian signs a fingerprint of the holdings at an as-of time, every day. Anyone can check backing between reports, and a late or missing report becomes a signed gap instead of a silence.
What it costs you today
Holders and counterparties rely on periodic reports, and on the issuer's word in between. Every reporting cycle is a moment of doubt, and every late or revised report costs confidence that is expensive to win back.
What changes
Reports that can't be quietly changed
Each reserve report is fingerprinted and signed when it is published, and a late report is recorded as late.
Fewer disputes over official data
A signed record of exactly what an auction result or data release said, and when, for contracts that depend on it.
Do it now
No call needed. Sign and check free in your browser, or run a paid service on the spot. For a paid service you see the price first and are charged only when the result is delivered; the signed result is yours to download and check.
Sign and check in your browser
Sign holdings, reserve reports and data releases, and check every day and every report.
Free. Keys and files stay on your device.
Open the appHoldings and reserves alerts
A signed digest of missing days, stated holdings below supply, late or revised reserve reports and missing countersignatures.
$25 per digest
Do it nowTimestamp holdings and reserve reports
Anchor each report the moment it is published, so a quiet revision is detectable.
$0.10 per file
Do it nowAlready have a BSVKey result file? Check that it is genuine, no account needed.
How it works now treasuries and reserves
Free in your browser: the custodian signs each day's holdings, the issuer each report, the accountant the version it reviewed, and any holder can check. A paid digest signs the alerts for an auditor or a board.
How it works
Each party signs a small record at the moment it takes responsibility. The records chain together, so a missing, edited or forged one is caught.
| Record | Signed by | Says |
|---|---|---|
| finance.holdings/1 | the custodian | one fingerprint over all positions at an as-of time (instrument, CUSIP, amount), the count, and totals by type; any single position provable on its own |
| finance.reserve/1 | the issuer, countersigned by its accountant | a fingerprint of the reserve report, its totals and the period it covers |
| finance.release/1 | the recording service | a fingerprint of a published data release, where it was fetched from, and when |
| finance.gap/1 | the attestation service | an expected attestation or report that did not arrive on time |
All records use canonical JSON, a SHA-256 fingerprint and an Ed25519 signature, the same primitives proven in our space custody work.
A real run
Sample T-bill fund, 30 days, every name and amount sample data
29 daily holdings roots signed by the custodian, 12 positions each
Series verified (signatures, chain, every day accounted for): PASS
day 17 no attestation: recorded as missing by the attestation service
day 24+ stated holdings 91.2% of tokens outstanding: flagged every day
A holder checks one position without seeing the rest:
SAMPLE004, par $5,000,000 true
same position, value raised by $1 false
Stablecoin reserve reports:
August on time, countersigned
September late, then revised ($1,005.0M -> $1,002.0M),
accountant countersigned the first version only
Recorded yield-curve file: the file as fetched matches;
a later copy with one rate changed differs
Tampering:
custodian quietly re-issues a day caught
a day deleted with no gap record caught
holdings signed by the wrong party caught
gap record forged by the custodian caught
revision passed off as countersigned caught
The shortfall in this sample run comes from the custodian's own signed statement: the evidence shows what was stated and when, which an auditor or holder then follows up.
Where it stands
- Status. Working today, free: sign your own records and check them in your browser with the sign-and-check app, built from the open-source code (Apache-2.0) with automated tests. The recording method for public data releases is the one already working for NOAA weather data. A design partner helps us connect it to your own systems and devices. We want a tokenized-fund issuer, a digital-asset custodian, or the accounting firm of a stablecoin issuer.
- For insurers. Insurers writing crime and custody cover for digital-asset custodians and tokenized funds can underwrite on continuous, verifiable holdings evidence instead of periodic statements.
- Scope. Evidence tooling only. BSVKey never holds client assets or moves money, gives no investment, legal or accounting advice, and does not replace an audit or an accountant's examination. An attestation proves what a signer stated and when, not that the statement is true. BSVKey is not affiliated with the US Treasury or the Federal Reserve.
- Billing. Pay as you go in US dollars or Bitcoin BSV, with prepaid credits or by invoice. Paying in dollars needs no cryptocurrency (how billing works, start now).
Try it on one loss
Send us the records from one loss that went wrong. We will show you what the evidence says.
Email embryospace@gmail.com