# Desk log CA-HASHED-20260823

**Status:** First-party illustrative retail composite; not customer, order, identity, marketing, statistical research, benchmark, or independently validated data  
**Run date:** 2026-08-23  
**Evidence checked:** 2026-08-31  
**Operator:** InfiniSynapse Data Team  
**Attestor:** William Zhu, InfiniSynapse cofounder ([GitHub @allwefantasy](https://github.com/allwefantasy))

The operator inspected 14,900 illustrative order lines carrying a hashed buyer key. Email, phone, and device ID were excluded. The output displayed 6.8% missing buyer keys, three first-order cohorts that flipped after 14-day returns and marketplace fees, and a 10.2% return rate for the flip set. A loyalty campaign and customer ranking were held.

The [cohort CSV](https://infinisynapse.com/blog-media/customer-analytics/downloads/cohort-summary-CA-HASHED-20260823.csv) exposes five aggregates and two held actions. The [verification script](https://infinisynapse.com/blog-media/customer-analytics/downloads/verify-CA-HASHED-20260823.py) checks outputs only. Order rows, cohort identities, hash method, denominators, contribution values, SQL, and customer records are unavailable.

External context: [NIST Privacy Framework](https://www.nist.gov/privacy-framework), [UK ICO data minimisation](https://ico.org.uk/for-organisations/uk-gdpr-guidance-and-resources/data-protection-principles/a-guide-to-the-data-protection-principles/the-principles/data-minimisation/), and [U.S. GAO Assessing Data Reliability](https://www.gao.gov/products/gao-20-283g) (retrieved 2026-08-31). These authorities did not review the run.