What are Bitcoin Audits?

Bitcoin audits help clients independently verify whether an exchange is solvent or whether they have been hacked or have misused their clients’ crypto.

Coinfloor is a custodian of client bitcoins and we believe that we must set the industry standard for transparency and regular attestations. Without proper public accountability, the industry will not be able to grow and mature. This is why we have always committed to releasing a Bitcoin audit (also known as “Provable Solvency” or “Proof of Custody”) Report every month. Coinfloor is proud to have the longest track record in the world for creating these reports – in fact, we have produced more solvency reports than all other major cryptocurrency exchanges combined.

You can review all our solvency reports below

For more information about why Bitcoin audits and Proof of Custody is so important, see the excellent article on how to effectively scale the Bitcoin industry by Nic Carter, the respected crypto commentator.

Make Exchanges Prove their Reserves

Powered by the Bitcoin Blockchain

The invention of the Bitcoin blockchain as a global decentralised ledger enables markets to produce new standards of accountability and the safeguarding of client funds. In a self-regulated environment such as Bitcoin, firms must compete for customers’ trust by providing greater transparency.

Maximum Accountability since 2014

We believe that this approach is the best way to achieve maximum accountability while retaining privacy for our clients. We welcome feedback from the community and hope that other exchanges are also able to safeguard client funds and will provide proof of solvency as well.

Report Published Every Month

Coinfloor is dedicated to accountability and has committed to publish a Provable Solvency Report every month, showing the total amount of client funds Coinfloor has on deposit and proving ownership of those funds on the blockchain.

All published Provable Solvency Reports

Need help? Email us at [email protected]

Date (UTC+05:30) name of the report Amount SHA-256 Hash of the report Transaction ID
Dec 18, 2014 Provable Solvency Report #9 – December 2014 3155.2001 XBT 0b3459f7390fe983404ce92255d77ab9f205ddb7bdd9c72ad6b4e97fee677ccf
9ae00403e8ecaef49a52b727a9765d772a2e50313903eedecdbf3e768bd8bc10
Copy to clipboard
Nov 19, 2014 Provable Solvency Report #8 – November 2014 4072.1269 XBT f5a78eeb21fd68c2bcdb4f4b222f59285b6705de0af0e7cd1a8ec5ba86f9fa25
3a5860f230c9e56e784c2600c1116e846027dc9d8002e5240f17bed4b1d2eb60
Copy to clipboard
Oct 22, 2014 Provable Solvency Report #7 – October 2014 2507.0061 XBT 6e57d304f290c51ea801e57b5593fe28bfc78df2e482bd1a2dab5b1af94264e5
843dbafbc64bd83094e0d9c2668ae8ef9302a1c84c87ecf30799ff0c4115dae8
Copy to clipboard
Sep 22, 2014 Provable Solvency Report #6 – September 2014 2356.378 XBT 0fda488186148304b7f1181ec9f01201566d98980e5f88e1c92e37e05dcceb65
66755a993681437e8e1a94d3ec4eabcd039a9c9bc0db76d465402c41c1d41330
Copy to clipboard
Aug 18, 2014 Provable Solvency Report #5 – August 2014 1682.6508 XBT 2c167b8083f43c0fade21c81ad9cd7cc096992e1549d374c7c26a24b55b386b4
74ca117615fd8f0fbaaf2e722e14b9123bc9061d72eb1ac236122f5971d4bda1
Copy to clipboard
Jul 21, 2014 Provable Solvency Report #4 – July 2014 1193.2385 XBT 17fcd432d8ddb52829f6fc7937e7889ef0ad063fa90d743b2b6a320930e93048
23efc10d505b536b332ffbec343389f39e4d4654b888fa1a30cb258c30c1f19f
Copy to clipboard
Jun 18, 2014 Provable Solvency Report #3 – June 2014 846.579 XBT 3a093308c48daa40e0201d290f76a762fab416c86e6052a58bb139cdef74e2ce
fc5d279f675bd697483cab7b02ca34bc89fc1ba6b190ba4e23f14a31a2e2dcac
Copy to clipboard
May 19, 2014 Provable Solvency Report #2 – May 2014 292.75683101 XBT 4b4fc702ca3093a9b3dc3f026e8b6d35a70ffd8e183c5bf49c18db00ac97b8e4
635dc48a0841f30ad9723839aad90fdf6d7da12a623f2a7c1607c681b311026b
Copy to clipboard
Apr 17, 2014 Coinfloor’s First Provable Solvency Report 160.29654334 XBT 156f86147d4c0e9dbfb37bed290980807939c50df3a3b6e11e160ced4ce54c47
573d096e74324683d9dc7e47af2a9df07b09bbd46c93f77bb4a4825ac685f595
Copy to clipboard
Transaction ID
9ae00403e8ecaef49a52b727a9765d772a2e50313903eedecdbf3e768bd8bc10
Name of the report Provable Solvency Report #9 – December 2014
Amount 3155.2001 XBT
SHA-256 Hash of the report 0b3459f7390fe983404ce92255d77ab9f205ddb7bdd9c72ad6b4e97fee677ccf
Date (UTC+05:30) Dec 18, 2014
Transaction ID
3a5860f230c9e56e784c2600c1116e846027dc9d8002e5240f17bed4b1d2eb60
Name of the report Provable Solvency Report #8 – November 2014
Amount 4072.1269 XBT
SHA-256 Hash of the report f5a78eeb21fd68c2bcdb4f4b222f59285b6705de0af0e7cd1a8ec5ba86f9fa25
Date (UTC+05:30) Nov 19, 2014
Transaction ID
843dbafbc64bd83094e0d9c2668ae8ef9302a1c84c87ecf30799ff0c4115dae8
Name of the report Provable Solvency Report #7 – October 2014
Amount 2507.0061 XBT
SHA-256 Hash of the report 6e57d304f290c51ea801e57b5593fe28bfc78df2e482bd1a2dab5b1af94264e5
Date (UTC+05:30) Oct 22, 2014
Transaction ID
66755a993681437e8e1a94d3ec4eabcd039a9c9bc0db76d465402c41c1d41330
Name of the report Provable Solvency Report #6 – September 2014
Amount 2356.378 XBT
SHA-256 Hash of the report 0fda488186148304b7f1181ec9f01201566d98980e5f88e1c92e37e05dcceb65
Date (UTC+05:30) Sep 22, 2014
Transaction ID
74ca117615fd8f0fbaaf2e722e14b9123bc9061d72eb1ac236122f5971d4bda1
Name of the report Provable Solvency Report #5 – August 2014
Amount 1682.6508 XBT
SHA-256 Hash of the report 2c167b8083f43c0fade21c81ad9cd7cc096992e1549d374c7c26a24b55b386b4
Date (UTC+05:30) Aug 18, 2014
Transaction ID
23efc10d505b536b332ffbec343389f39e4d4654b888fa1a30cb258c30c1f19f
Name of the report Provable Solvency Report #4 – July 2014
Amount 1193.2385 XBT
SHA-256 Hash of the report 17fcd432d8ddb52829f6fc7937e7889ef0ad063fa90d743b2b6a320930e93048
Date (UTC+05:30) Jul 21, 2014
Transaction ID
fc5d279f675bd697483cab7b02ca34bc89fc1ba6b190ba4e23f14a31a2e2dcac
Name of the report Provable Solvency Report #3 – June 2014
Amount 846.579 XBT
SHA-256 Hash of the report 3a093308c48daa40e0201d290f76a762fab416c86e6052a58bb139cdef74e2ce
Date (UTC+05:30) Jun 18, 2014
Transaction ID
635dc48a0841f30ad9723839aad90fdf6d7da12a623f2a7c1607c681b311026b
Name of the report Provable Solvency Report #2 – May 2014
Amount 292.75683101 XBT
SHA-256 Hash of the report 4b4fc702ca3093a9b3dc3f026e8b6d35a70ffd8e183c5bf49c18db00ac97b8e4
Date (UTC+05:30) May 19, 2014
Transaction ID
573d096e74324683d9dc7e47af2a9df07b09bbd46c93f77bb4a4825ac685f595
Name of the report Coinfloor’s First Provable Solvency Report
Amount 160.29654334 XBT
SHA-256 Hash of the report 156f86147d4c0e9dbfb37bed290980807939c50df3a3b6e11e160ced4ce54c47
Date (UTC+05:30) Apr 17, 2014

Instructions For Validating A Solvency Report:

  1. Open the Provable Solvency Report file by clicking on the name of the report.
  2. Go to https://passwordsgenerator.net/sha256-hash-generator/ or to your SHA256sum calculating application.
  3. Copy the entire contents of the solvency report (including any leading or trailing spaces or blank lines) into the SHA-256 generator and calculate the SHA-256 hash of the report. You can confirm the hash generated matches with the SHA-256 hash of the report field.

  4. Go to: The Bitcoin block explorer https://live.blockcypher.com/btc/ and search for the Transaction ID of the report.
  5. You will find the hash generated in the previous step matches the hash in the “Hex” reference (at the top of the page below a heading saying “Data Embedded in Transaction with Unknown Protocol”) of the transaction published on the Bitcoin blockchain.

Instructions For Finding Your Account Balance Within A Solvency Report

The provable solvency report consists of balances attached to SHA-1 hashes for each customer account.

  1. You can generate your SHA-1 hash by using your local SHA1sum application or online calculators such as https://xorbin.com/tools/sha1-hash-calculator.
  2. You will need the timestamp from the Solvency Report (10 digit number on the first row of the report) followed directly by the API authentication cookie from your Coinfloor account.

    Example :

    Timestamp: 1579519XXX

    API authentication cookie (API Key): 9BTa7M0Z/Mrk6tFMJwXXXXXXXXXX

    Input to calculate you SHA1 Hash is: 1579519XXX9BTa7M0Z/Mrk6tFMJwXXXXXXXXXX

  3. 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: http://www.satoshi.24ex.com.
Coinfloor CFUK logo

We believe that this approach is the best way to achieve maximum accountability whilst 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 a regular basis.