Coinfloor to list Bitcoin Cash (BCH) in addition to Bitcoin (XBT)

Further to our post from earlier this week, Coinfloor will now be listing Bitcoin Cash in addition to Bitcoin.  

We have taken the decision to support Bitcoin Cash, due to the increasing demand from our clients to add support. As a reminder, Bitcoin Cash (BCH) is a new cryptocurrency that is similar to but not in consensus with Bitcoin (XBT).

Coinfloor will be doing the following:

  • We will continue to allow deposits, withdrawals, and trading of Bitcoin (XBT). However, from 4pm BST on Monday July 31st, we will temporarily move to making Bitcoin withdrawals from cold storage only. This means that Bitcoin withdrawals will happen 1 – 2 times each working day and Advance Withdrawals for small amounts will not be available.
  • We will enable deposits, withdrawals, and trading of Bitcoin Cash (BCH) as soon as practicable, after August 1st, 12:20 UTC. There may be periods of reduced service to our site as we update it with the additional Bitcoin Cash functionality and load each user’s account with their initial Bitcoin Cash balance.
  • After August 1st, 12:20 UTC, we will begin creating BCH balances for each of our clients who hold XBT with us and credit them with an amount equal to their XBT balance at August 1st, 12:20 UTC. It may take some time to complete this process so clients will be credited with their Bitcoin Cash from our earliest clients to our newest.
  • We will not be charging fees for setting up Bitcoin Cash balances for each user.
  • We will not be charging fees for BCH Deposits.
  • We will not be charging extra fees for BCH Withdrawals. There will be a nominal fixed fee, similar to what we charge for BTC withdrawals, to cover miner fees.
  • As with all Coinfloor trading, we will not be charging fees for BCH trading.
  • As with our 100% multi-signature cold Bitcoin storage policy, all our client’s Bitcoin Cash will be deposited directly into, stored in and withdrawn from 100% multi-signature cold storage.
  • Initially, our Advance Withdrawals service will not be available for BCH. Clients will need to wait for our daily cold storage withdrawals to receive BCH they wish to withdraw.
  • We may increase the number of confirmations required for a deposit of Bitcoin to be processed from 3 to 6 as a safety precaution.
  • Our aim is to minimise disruption to our clients.  However, we may pause the processing of deposits and withdrawals or trading of Bitcoin and Bitcoin Cash temporarily, if we feel it is necessary.
  • Given the fluidity of the situation, we reserve the right to not proceed with all or part of the above plan if there is a significant change in events.

Please visit the site regularly for further updates.

Thank you

Coinfloor Team


Provable Solvency Report #40 – July 2017

Coinfloor is a custodian of client bitcoins and we believe that we must set the industry standard for transparency and regular audits. Without proper public accountability, the industry will not be able to grow and mature. This is why we are committed to releasing a Provable Solvency Report every month. Coinfloor is proud to have the longest standing track record among bitcoin exchanges in regards to auditing.

Today we are publishing our 40th monthly Provable Solvency Report with step-by-step validation instructions for your convenience.

As of today, Coinfloor holds a total of 5,216.3059 XBT on behalf of our clients. You are invited to verify that your held bitcoins are included in this balance by following the instructions below.

What does the Provable Solvency Report include?

We started out by creating an obfuscated report of all current client balances (the Solvency Report) and then generated a SHA-256 hash of this report.

We then created a bitcoin transaction to ourselves, that includes all currently held client bitcoins, for a value of 5,549.5441 XBT and included in the output script the OP_RETURN of the SHA-256 hash of the report, proving that at the time of making the solvency report, Coinfloor held all of our clients’ XBT funds. You can verify the amount and details of the transaction on the blockchain.

Key Pieces of information:

Provable Solvency Report #40 (July 28, 2017):

SHA-256 Hash of the Provable Solvency Report: 20170728514ca4d6cb04287fc3c1db0e5517ca086a2c395f0c34fad8677f7cf7b43933c6

Transaction ID: 27d73ad80ad69dd74e388f18f60dac03f327a79daef07c5afbeb8443bed71968

View the transaction here:

Your API authentication cookie:
You will find it in My Account > Dashboard in the Coinfloor signed in view, in the API section (visible only for fully verified accounts).

Where is my cookie?!

Instructions for Validating Solvency Report:

      1. Open the Provable Solvency Report file:

      2. Go to or to your SHA256sum calculating application.

      Copy the entire contents of the solvency report into the SHA-256 generator and calculate the SHA-256 hash of the report.
      3. Go to

      At the bottom of the page, in the Output Scripts section, you will find the generated hash in the OP_RETURN output script of the transaction that includes all customer bitcoins.
      4. Go to

your local SHA1sum application

      to calculate the SHA-1 digest of a message consisting of the timestamp shown at the top of the Solvency Report (1498749879) and your API authentication cookie.
      Example (Linux):
                timestamp: 1501241504
                API authentication cookie (API Key): 9BTa7M0Z/Mrk6tFMJwEkTV3BQek=
                command: echo -n ‘15012415049BTa7M0Z/Mrk6tFMJwEkTV3BQek=’ | sha1sum
      5. Find the resulting hash in the solvency report. Your balance is shown on that line in satoshi units. 1 bitcoin = 100 000 000 satoshis. For your convenience, here is a link to a bitcoin unit converter:

We believe that this approach is the best way to achieve maximum accountability while retaining privacy for our clients. We welcome your feedback and hope that in time, other exchanges will also help safeguard client funds by providing proof of solvency reports to their users on regular basis.

Thank you for your trust,

Coinfloor Team

Bitcoin Hard & Soft Forks: Modified Exchange Operations

UPDATE 8/01/17 6:45 PM EDT: Gemini has resumed all bitcoin withdrawals and crediting of deposits. Beginning at 6:00 p.m. EDT on Monday, July 31, 2017 (22:00 UTC), Gemini will temporarily disable all bitcoin withdrawals and crediting of deposits in advance of any Bitcoin hard and/or soft forks. Both USD and ether deposit and withdrawal functionality will be unaffected. We will resume allowing bitcoin withdrawals and crediting deposits after we believe the Bitcoin Network has stabilized, which is anticipated to be sometime Wednesday, August 2, 2017 (EDT). Gemini users may still trade bitcoin on our BTC/USD and ETH/BTC matching engines and participate in […]