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> According to a supplemental expert report conducted by the Mastercard-owned blockchain analysis firm Ciphertrace, Ciphertrace had found "discrepancy rates between Ciphertrace and Chainalysis attribution data upwards of 60%", and an error rate "upwards of 64%" for the behavioral heuristic. Ciphertrace noted that, in the Sterlingov case, "over 527,000 Bitcoin Fog addresses" were clustered by Chainalysis using the behavioral heuristic, and that "Ciphertrace does not utilize Heuristic 2 (behavioral) because it is inaccurate, error-prone, and over inclusive".
Ciphertrace's report concluded that "Chainalysis attribution data should not be used in court for this case nor any other case: it has not been audited, the model has not been validated, nor has the collection trail been identified".