TL;DR: Most US media buyers do not hold a verifiable record of what they agreed in their programmatic deals. This article explains what a verifiable deal record looks like, why it matters, and how to get one.

The Accountability Gap in US Programmatic

The ANA's 2023 programmatic transparency study confirmed what many US agency and brand-direct buyers already suspected: large portions of programmatic spend cannot be traced through the supply chain. Buyers frequently cannot account for what happened to their budget between the DSP and the publisher.

Part of this problem is structural. Most programmatic deals are not documented in a way that gives the buyer an independent, verifiable record of what they agreed. The deal ID system tells a DSP which inventory to bid into. It does not give the buyer a document they own, that records the agreed terms, that they can compare against delivery.

This is the accountability gap. And for US buyers under pressure from finance teams and CMOs to account for programmatic spend, it is not a theoretical problem.

What "Verifiable" Actually Means

A verifiable deal record has three properties.

Independent custody. The buyer holds a copy of the record that is not dependent on the seller's system. If the seller changes their records, the buyer's copy is unaffected.

Tamper evidence. The record is structured so that any change after the initial agreement is logged, with a timestamp and a record of who made the change. The original agreed terms remain visible.

Completeness. The record contains the full agreed terms: price, inventory, targeting, brand safety conditions, volume commitments, and the identities of the parties who agreed them.

A deal ID does not have any of these properties. A shared deal sheet, held bilaterally, has all three.

How to Get a Verifiable Record Today

US media buyers have three practical routes to verifiable deal records.

Direct deals with formal documentation. For large direct publisher relationships, the insertion order already provides a bilateral record. The problem is that IO-based direct deals are expensive to manage at scale and do not cover programmatic activity.

Agentic marketplace platforms. Platforms built for agent-to-agent negotiation, such as Alkimi, produce a bilateral deal record as a native output of the deal process. When a buy-side agent and sell-side agent agree terms, both parties hold a copy of the DealSheet. The marketplace holds the audit trail. This is the only category of platform that provides verifiable records at programmatic scale.

Contractual requirements with supply partners. US buyers can require their SSP and exchange partners to provide deal-level reporting that includes the agreed terms. In practice, most supply partners do not offer this as a standard feature, but buyers with sufficient scale can negotiate it.

What to Include in a Deal Record Request

If you are working with supply partners to establish better deal documentation, the minimum your deal record should contain is:

- Agreed floor price or CPM - Inventory categories and publisher properties covered - Targeting and audience parameters - Brand safety requirements and exclusions - Impression volume or spend commitments - Identity of the parties (buyer and publisher) who agreed the terms - Timestamp of the agreement - Version history showing any amendments and who authorised them

Any supply partner that cannot provide these elements cannot give you a verifiable deal record.

Why This Is Becoming a Competitive Requirement

The World Federation of Advertisers and several major US advertiser groups have made supply chain transparency a standing requirement for agency and supply partner selection. As agentic buying scales, the question of who agreed what on behalf of the brand becomes more urgent, not less.

Buyers who establish verifiable deal record practices now will have the governance infrastructure to manage agentic advertising at scale. Those who do not will find themselves accountable for deals their agents agreed without any independent record.

The practical step is simple: identify which of your current supply relationships can provide a bilateral deal record, and start building the infrastructure for the rest.