Blockchain's Missing Piece: Structured Data in OOH Advertising

The promise of blockchain technology to fix advertising's supply chain has largely fallen short. The idea was that a distributed ledger would provide verifiable delivery, transparent intermediaries, and an auditable record of transactions. However, this solution misdiagnosed the problem.

The actual issue in digital advertising is that the supply chain routes through a handful of platforms that control both the environment and the reporting. These platforms grade their own homework, making it difficult to trust the numbers they provide. Adding cryptographic proof to self-reported metrics only creates a tamper-evident version of an untrustworthy number.

In contrast, out-of-home (OOH) advertising has a different structure. Billboards sit in the physical world and report directly to buyers, without the need for intermediaries or self-interested reporting platforms. This independence was initially seen as a weakness, but it actually allows for direct transactions and legible pricing.

A new infrastructure is being built that models physical inventory into structured data, enabling buy-side systems to sit on top of it. This setup provides buyers with direct, auditable access to physical supply without the need for tokens or consensus mechanisms.