Satohash brings independently verifiable proof of existence to the work that can't afford to trust — without the document ever leaving your control. This brief walks the five lanes where that matters most, and — as always — states plainly where the line is that we do not cross.
The principle running through all five: Satohash proves existence-at-a-time. It is strong, independently verifiable evidence. It is not a notary, a signature, a qualified time stamp, or a compliance certification. Every claim below respects that line — because that is what survives scrutiny.
Buyers, sellers, and their counsel need to prove the state of documents at a moment in time before closing: virtual data-room exports, financial statements, board approvals, share registers, material contracts, disclosure schedules. In a dispute after closing (“this version wasn't what we agreed”), the classic fight is which version existed when. A Satohash anchor on a diligence package proves that exact byte set existed by block N — independently verifiable by both sides' counsel, no reliance on the data-room vendor's own records.
Anchored evidence of state-at-a-time for diligence packages, versioned contracts, and closing-bundle snapshots. Chain of custody (who held the file + the .ots) makes it stronger.
We are not a virtual data room, not a signing agent, and we do not authenticate the content of a document (that's the deal's own diligence). An anchor proves existence and integrity of the bytes, not that the business is financially sound.
“Satohash lets M&A teams anchor diligence and data-room documents to prove their exact state before closing — independently verifiable evidence of existence-at-a-time, useful in post-closing disputes over which version was in play. It is not a data room or a substitute for deal diligence.”
Family offices keep long-horizon records: wills, trusts, deeds, asset registers, powers of attorney, tax filings, succession documents. The horizon is decades to generations. Records kept only in a proprietary system are only as durable as that system. A Bitcoin-anchored hash survives vendor failure, corporate closure, and — for the sovereign-family use case — jurisdiction or regime change. The .ots proof is portable and verifiable forever with open tools.
Multi-generational integrity — the record can't be quietly altered or lost to a closed system. Wealth-sovereignty framing: the proof of an asset document is self-custodied, not held by a third party.
We do not store, custody, or manage the documents, keys, or assets. We are not an escrow, a custodian, or a succession-planning service. Self-custody of the original file and keys remains the family's responsibility — which is precisely why the open, portable proof matters.
“Satohash gives family offices a multi-generational integrity layer: asset documents, wills, and registers anchored to Bitcoin so their existence and state are provable for decades, verifiable forever with open tools, and never held or custodied by us.”
Spanish- and Portuguese-speaking markets (Brazil, Mexico, Argentina, Chile, Colombia, Peru, Spain) have civil-law, notarial traditions where evidence rules differ from common law. Local law determines whether a Bitcoin-anchored hash is admissible and what weight it gets. The regulated lanes (ICP-Brasil, FEA/NOM-151, firma digital, eIDAS) govern identity; Satohash provides the existence-at-a-time anchor that complements them.
In most LatAm jurisdictions, electronic records cannot be rejected merely for being electronic, and hash integrity supports authenticity. Stamp + notary is the strong pattern: Satohash for the provenance trail, notary for the final act where law requires one.
We never claim ICP-Brasil, NOM-151, firma digital, or eIDAS compliance, and never use the word “certificado” in a way that implies notarial status. Admisible, no se presume exacto.
“In Latin American civil-law systems, Satohash evidence supports proof of existence and integrity of electronic records and is admissible as supporting evidence in most jurisdictions. It does not replace the notary where local law requires one, and complements regulated identity lanes (ICP-Brasil, FEA, firma digital).”
Tax authorities require records to exist, be unchanged, and be provable as of the relevant fiscal period. Timestamps support retention, audit trails, and reconstructing what was on file at a deadline. In a reconstruction audit or a deadline dispute (“this return draft wasn't what I filed”), an anchor proves a record's state at block N — integrity and timeliness, independently verifiable.
Evidentiary support for audit trails and fiscal-deadline disputes. Pair with a documented retention/DLP policy to make the practice auditable.
We do not file returns, replace statutory record-keeping, or certify compliance. Regulators weigh evidence; they don't “certify” timestamps. And never stamp raw tax records with PII/TPINs to a public chain — hash only.
“Satohash evidence supports tax compliance by independently proving the existence and integrity of records as of a given time — useful for audit trails, retention, and fiscal-deadline disputes. It does not file returns or replace statutory record-keeping obligations.”
Commercial and enterprise buyers use Satohash at volume (API, batch, integration into their products) and pay for premium tiers. The differentiator vs. document SaaS that stores your full files: hash on-chain, file never leaves the device. “If a party claims a contract was altered, the cryptographic timestamp ends the argument.”
Privacy-preserving integrity anchor with zero vendor lock-in — portable .ots, verifiable with open tools forever, even if we vanished. Built for builders: REST API, webhooks, SDKs, AI-agent guides.
Premium tiers ship with a fair, bounded commercial agreement: the customer takes responsibility for their own documents and use, our liability is capped and excludes consequential loss, and the Enterprise SLA is quantified and limited. We don't claim readiness we haven't shipped — and free stays free.
“Satohash premium tiers ship with a fair, bounded commercial agreement: the customer takes responsibility for their own documents and use, our liability is capped and excludes consequential loss, and the Enterprise SLA is quantified and limited — with a free base that is never paywalled.”
M&A data rooms, family offices, Latin markets, tax & compliance, enterprise — five serious lanes, one honest anchor: proof of what existed, when, verifiable forever.
Honest posture: this brief is the public-facing companion to the Satohash Mission & Scope. It is built for visitors, reviewed with a counsel lens, and — like every family document — respects the line between strong, independently verifiable evidence and certified compliance. Free non-commercial today, Bitcoin-only, no invented entity.