The platform
Custody policy you can hand to someone else.
Sentinel turns how you hold Bitcoin into a written policy — one a lawyer, an executor or an auditor can read and act on. You describe the arrangement; the software checks it and produces the document.
Custody Policy Brief · sample
Two heirs, one executor.
The artefact
What you get
Custody Policy Brief · sample
Two heirs, one executor.
§1§2Verified · PASS · samplefor the executorA governance brief
One document describing the policy in plain language, for the person who has to act on it.
Verdict · sample
PASS
Same policy in, same verdict out. No model, no judgement call.
deterministic · citable
A deterministic check
Every policy is verified by a Miniscript proof engine — a pass or a fail, no judgement call.
Readiness · sample
70/100
- Key management84
- Redundancy76
- Inheritance58
- Operations69
- Regulatory63
A readiness score
Five pillars, so you can see which part of the arrangement is weakest before someone else does.
The reader
Who it is for
Fiduciary consultants who have to show their work, and holders whose arrangement has to survive them. If a custody question ends with someone else needing to understand what you set up, that document is the thing Sentinel makes.
The funnels
Start where your question is
Sentinel is made by Custody Agents S.L., Barcelona. Non-custodial by design: it never holds keys.
Free, and it does not need an account.