Verified Holdings Certificate
Enterprise-grade platform, assembled and tested in the EU.
Everything in Address Verification, plus the part that makes the document worth presenting: documented proof that the wallet is under your control.
A blockchain address is public. Anyone can look up a large wallet and read its balance, which means a certificate stating only a balance proves nothing about whose balance it is — and a compliance officer who has seen a few of these knows it. Here the certificate records PROOF OF CONTROL: PASSED, with the method and the date.
This is the level banks, exchanges, auditors and courts expect. If the document is leaving your desk, order this one.
How control is proved
Message signature. We send you a phrase containing your certificate number. You sign it inside your own wallet — signmessage in Electrum, Sparrow, Trezor or Ledger for Bitcoin, personal_sign in MetaMask or a comparable wallet for EVM chains. We verify the signature against the address. It takes about two minutes and the key never leaves your device.
Micro-transaction. Where signing is impractical, you send an exact amount we specify, to an address we specify, inside a window we specify. Matching it on-chain demonstrates control just as well. The amount is yours to keep — it goes to an address you control.
What you receive
- Everything in Address Verification
- Proof of control by signature or micro-transaction, recorded on the certificate as PASSED
- Up to three addresses on one certificate, each with its own control check
- Priority handling
- Free re-issue with an updated balance within twelve months, for when a recipient asks for something current
How it works
After checkout we email you what we need. There is no account to create and no software to install, and the whole exchange happens by email unless you would rather talk.
We never ask for a seed phrase, a private key, a wallet file or exchange logins. There is no version of this service that requires them. If anyone contacts you claiming to be us and asks for any of those, it is not us.
What this certificate does not do
- It does not determine tax residency, tax liability or eligibility for any tax treatment, and it is not a tax ruling or a legal opinion.
- It does not establish what you paid for the assets. The chain records amounts, not prices.
- It is not an audit or an assurance engagement. Kentino is not an accounting firm.
- It cannot cover assets held in an exchange account — there the exchange holds the keys, and the address on the chain is theirs.
- It does not guarantee acceptance. Every institution sets its own evidence requirements, so ask yours before you order.
If we cannot complete the verification you ordered, you are refunded in full.
Full explanation of the service · Ask us first, before you order
The questions buyers ask us most often before ordering a server.
How long does it take?
Machines built from components we hold ship quickly; anything requiring a specific GPU generation depends on supply. We give you a date before you pay, and if it moves we tell you rather than letting you find out.
Can the configuration be changed before you build it?
Almost always. GPUs, memory, storage and cooling are chosen per order, and the listed configuration is a starting point rather than a fixed package. If you need more VRAM, faster storage or a different cooling approach, say so before you order and we will quote the change.
Can I collect the server in person?
You can. Our warehouse is in Prague, and collection in person is welcome — most people who come use the visit to go through the machine with our engineer and ask the questions that are awkward over email. For orders within the Czech Republic we also try to deliver personally and walk you through the setup on site.
Can I talk to someone who actually understands the workload?
Yes. We have an engineer who works on AI systems specifically, not a general sales desk. If your question is about batch sizes, quantisation, interconnect or where your bottleneck will be, ask it — that conversation usually changes the configuration for the better.
Which model can I run on this configuration?
Yes. Every machine is assembled, burn-in tested and benchmarked on real AI workloads before it ships, and it leaves us with an LLM already installed and running. You plug it in, connect it to your network and start work — the only decision left is which project it runs first.
How do you test a server before shipping?
We run it against actual AI workloads rather than synthetic scores: inference throughput, sustained load behaviour and thermals under continuous operation. You get the benchmark results with the machine, so the performance you were promised is the performance you can verify on day one.
Is the server ready to run when it arrives?
Yes. Every machine is assembled, burn-in tested and benchmarked on real AI workloads before it ships, and it leaves us with an LLM already installed and running. You plug it in, connect it to your network and start work — the only decision left is which project it runs first.
Ships from our EU warehouse. Heavy items may require freight arrangement — contact us for a shipping quote and lead time. 2-year limited warranty with advanced RMA support; extended warranty available.
Not exactly what you need?
Tell us your workload and we'll spec this platform around it — GPUs, memory, storage and cooling matched to what you actually run.