Why Every CTO Should Understand Blockchain Accounting

I have written about blockchain and its implications for accounting since 2017, when I published a two-part series in Connecticut CPA magazine while working as Director of Technology and Management Consulting at RSM US LLP.

• Part 1: Blockchain Brings Exponential Disruption, Growth Potential to Accounting
• Part 2: How Blockchain Is Becoming an Essential Tool for the Exchange of Value

The most common reaction from CTOs back then — and still today — is: "We are not a crypto company — why should I care about blockchain?" The answer has nothing to do with cryptocurrency.

The Accounting Problem

Every enterprise has the same accounting challenge: multiple systems of record that do not agree with each other. The ERP says one thing. The CRM says another. The bank reconciliation spreadsheet says something else entirely. And the audit trail connecting them is a patchwork of exports, manual entries, and crossed fingers.

Blockchain technology — specifically, distributed ledger concepts — offers a fundamentally different approach: a single, immutable, shared record of truth.

Triple-Entry Bookkeeping

Traditional accounting uses double-entry bookkeeping: every transaction has a debit and a credit. This system has worked since the 15th century. But it has a flaw — each party maintains their own books, and reconciling between them is expensive, slow, and error-prone.

Triple-entry bookkeeping adds a third entry: a cryptographically sealed record on a shared ledger. Both parties reference the same transaction record. Disputes become provable. Reconciliation becomes automatic. Audits become real-time rather than annual exercises.

What I Wrote About in 2017–2018

In my CTCPA series, I covered the areas where blockchain was already proving transformative:

• Cryptocurrencies and tax implications — how CPAs need to understand virtual currency reporting guidance
• Know-Your-Customer (KYC) and Anti-Money Laundering (AML) — how distributed ledgers improve onboarding and compliance
• Smart contracts — self-executing code on a blockchain that can automate approvals, calculations, and transfers of value
• Successful use cases — from Cook County property deeds to the Australian Securities Exchange replacing its clearing system

The major consensus then, and now, is that blockchain is here to stay. The question is how the accounting and auditing profession adapts.

What Has Changed Since

When I wrote those articles, blockchain was mostly theoretical for enterprise accounting. Since then:

The tools have matured. Enterprise data platforms now offer many of the benefits blockchain promised — immutable audit trails, data lineage, and real-time reconciliation — without requiring a distributed ledger. The concepts matter more than the specific technology.

Smart contracts got real. What I described in 2018 as a future possibility — auditing smart contract code, reviewing decentralized applications — is now a genuine skillset. Solidity developers and smart contract auditors are in demand.

The profession is catching up. Cross-training between accounting and technology is no longer optional. As I wrote in the original article: "Computer programming will play a more significant role, but it will be up to humans to determine whether certain steps have been processed correctly or whether they have gone awry."

Why This Still Matters

Blockchain's core innovations — immutability, distributed consensus, cryptographic verification — are powerful regardless of whether you deploy an actual blockchain. Understanding these concepts makes you a better technologist, a better auditor, and a better advisor.

The original articles are linked above if you want the full deep dive.