COLDHARBOR
Enter the wallet Wallet preview
Demo

0.81273800 BTC

≈ $81,273.80 USD

0.900.750.600.45
Apr 21Apr 28May 12May 26
Try send Receiving
Example portfolioNo real funds
Self-custody · no email signup

The walletThat knowsNOTHINGAbout you.

Bitcoin Silent Payments.
No email or phone signup.
Your keys stay local.
Network privacy has limits.

Enter the wallet Read the manifesto
  • No email signup
  • Local keys
  • Local signing
Silent payments

Receive Bitcoin without address reuse.

Local signing

Approve payments with keys on your device.

Private by default

Create a wallet without an email or phone number.

Article I

Privacy isStructural

Privacy is not a mode you turn on.

No email signup

Create a wallet without email or phone.
You hold the keys and approve payments.
Keep your recovery phrase safe.

Read the security model
Deck 02

The Interface

Operational clarity.
Editorial character.

01BalanceHoldingsActivitySee balances and recent payments. Try hiding the balance or changing the chart period.
02Choose a feeReview the totalChoose a fee and review the total. This example never signs or sends a payment.
BTCXMRDBL
Example balances✦ ColdHarbor ✦Interactive preview
Portfolio · BTC equiv.

0.81273800 BTC

$81,273.80

+2.4% · 7D

Send Receive
Example balances
Portfolio course
$84K$76K$68K
May 14May 16May 18May 20
Holdings
₿Bitcoin0.74210000 BTC+2.8%
MMonero15.60 XMR+1.3%
ÐDbloon12,720 DBL/
Recent activity
Received+0.12500000 BTC14 min ago
Sent-2.00 XMRYesterday
OrderDispatch orderDemo

Dispatch

Send bitcoin
01Compose02Review03Sign04Broadcast
Recipient
bc1p…7x3kTaproot example
Amount

0.02500000 BTC

$2,500.00

Available 0.74210000 BTC
Network fee
Order summary
Amount0.02500000 BTC
Network fee0.00002520 BTC
Total0.02502520 BTC
Destinationbc1p…7x3k
Local signingDEMO · NO REAL FUNDS

Example fees for a 140 vB transaction.

Protocol 352. One public code, a fresh destination every time.

Protocol 352BIP-352Bitcoin

One public
code.

A fresh destination
every time.

How silent payments work

Share

Derive

Discover

Reusable payment codesp1qqgste7k9…juexzkIllustrative code only
The sender combines transaction inputs with the public payment code to derive a fresh destination.
bc1p5xq7u3…9k2m4hbc1paz8r6l…3n7q9dbc1pk9m2v6…8t5s1fbc1p0d3y8w…4j6h2k

Share your code. A compatible sender derives a fresh destination; your wallet scans for incoming payments. Bitcoin transactions and amounts remain public.

  • bc1p5xq7u3…9k2m4h0.0421 BTCExample
  • bc1paz8r6l…3n7q9d0.0100 BTCExample
  • bc1pk9m2v6…8t5s1f0.0065 BTCExample
  • bc1p0d3y8w…4j6h2k0.0250 BTCExample
✦ Manifest 03 ✦

The
Asset
Hold

Each asset has its own network, addresses, and fees.

Bitcoin. Receive with Silent Payments or standard addresses. Signing stays on your device. Check the selected network. Bitcoin transactions and amounts remain public.
Monero uses its own privacy protocol. Monero scanning and sending are currently disabled in ColdHarbor. The interface shows a preview.
Dbloon addresses are derived from your recovery phrase. Transfers are signed locally and require a configured relay. Dbloon uses its own addresses and network fees.
Hold planLower deck
LAT.43° 39' NIllustrated chart marker
LON.70° 15' W
LEDGERCH-01
CLASSPRIVATEER
STATUSASSET HOLD
Example balances. Availability depends on wallet configuration. ✦

Article IV. Your keys stay aboard. Protect your device and recovery backup.

Trust boundaries

  1. 01Key creation, on device

    Your recovery phrase and wallet keys are generated in your browser. The wallet stores your phrase encrypted when you set up device unlock.

  2. 02Signing, localLocal signing example

    Supported transactions are built and signed on your device. The relay broadcasts the signed transaction; it does not receive your spending keys.

  3. 03Email or phone, not required

    You do not need an email address or phone number to create a wallet. A connected wallet still uses a public-key-derived identifier and a device session with the relay.

  4. 04Network data, shared

    A relay connection carries network requests and signed transactions. The current Bitcoin integration also reports matched incoming outputs. Local keys do not make network activity invisible.

  5. 05Recovery, user controlled

    Store your recovery phrase somewhere safe. A PIN unlocks this browser; an optional passkey can protect an encrypted backup. ColdHarbor cannot reset a lost recovery phrase for you.

Inspect the trust boundaries
Local keysLocal signingUser control
✦ Passage 04

North AtlanticPassage

Your wallet signs. The relay connects.
The network confirms.

Your wallet builds and signs on your device. The relay fetches chain data and submits signed transactions. The network validates them and includes them in blocks.

The relay carries requests.
Your wallet keeps the keys.

The relay receives connection and transaction data, including incoming Bitcoin outputs reported by the wallet.

Submitted does not mean confirmed. The wallet waits for the network to report payment status.

Request path · illustration
Trace the network course

Folio: CH-NET-04 ✦

  1. 01Create a walletStart on your deviceStart here
  2. 02Back up your keysKeep your phrase safe
  3. 03Check the networkMatch asset and network
  4. 04Choose how to receiveCode or standard address
Explore receiving options
CH-END-06

Private Self-Custody

LeaveNoWake.

A wallet you create. Keys you control.
Explore the interface, then make it yours.

Enter the wallet

Interactive preview · Check asset and network settings in the wallet