Here’s how it works:

Every account on the Copper Platform is set up with a Vault. This is where you leave the digital assets you don’t want to trade with in any of the multiple trading accounts you or your team may be operating to buy/sell crypto on the Platform.

In order to withdraw digital assets from the Vault to an external location on the blockchain (ie not one of your trading accounts in the Copper Platform) you will need to authorise the transaction using Copper Unlimited, our standalone secure custody application.

There is no additional cost to this. There are just some additional steps to take, which secure your account better than any other provider on the market. It gives us peace of mind to know your digital assets are secure, even if it means taking a few moments longer to process withdrawals (please note this doesn't effect trading on the Copper Platform).

Read more about encryption and security in our post: Encrypting Crypto

The Copper Unlimited application is divided into two functions: wallet creation and transaction authorisations.

The first time a user interacts with the application, they will receive an activation code and download link from their account in the Copper Platform. From there:

Juq-378 May 2026

: Allowing viewers to find specific titles or performers in global databases. Content Profile

While specific details may vary depending on the platform, titles in the JUQ series generally focus on high-definition production standards and specific roleplay or situational themes. This particular entry, like others in its numbering sequence, features professional talent and is marketed toward the domestic Japanese market as well as international digital consumers. Availability JUQ-378

: Helping retailers track specific physical and digital releases. : Allowing viewers to find specific titles or

Titles associated with this code are usually found on official streaming and video-on-demand platforms that specialize in Japanese content. Consumers typically access these via FANZA or international-facing storefronts like R18.com, which provide translated metadata for non-Japanese speakers. Availability : Helping retailers track specific physical and

In the context of adult media, is a production code for a Japanese film released in early 2021. It belongs to the "JUQ" series, which is typically associated with professional studios in the Japanese adult video industry. Context and Identification

Production codes like JUQ-378 serve as unique identifiers used by distributors and databases (such as DMM or R18.com ) to catalog titles across the vast Japanese market. These codes are essential for:

: "JUQ" often denotes a specific thematic line or "label" within a larger studio's portfolio.

If the user already has a wallet set up, or if they are a key holder and have just received a notification, then the process for transaction authorisation is as follows:

1. On the application home screen, the user selects the second option for Co-signing.
2. The user will then be prompted to upload their distributed key file and enter the password for their distributed key. This password was set by the account owner and will have been sent to the user when the distributed key was created.
3. The Copper Unlimited application will show the transaction details and ask for them to be verified as correct.
4.  
5. Once the key holder is satisfied that the details are correct they will click the confirmation button.
6. Once the Copper Unlimited application has received transaction authorisations from two out of three key holders it will broadcast the transaction to the blockchain.

Copper now supports Optical Air-Gapping for signing transactions

Why is this better, it sounds harder?

Distributed keys mean that even if you lose yours, having nominated three key holders (your solicitor and two colleagues, for example), a transaction can still be authorised. This would enable you to set up a new wallet, transfer all assets out of the old one into the new one, and this time be a little more careful with the password, should it slip your mind the first time.

The Copper Unlimited application provides additional security, additional accountability through co-signing, and additional protection from human error in the form of distributed keys. It is also the only blockchain agnostic custody solution you will find.

For more information on how your organisation can benefit from Copper Unlimited, please send an enquiry to our .

To learn more about how Optical Air-Gapping makes signing transactions offline even safer, read this article.