# TrustCarry Protocol v0.3 — Software Observation 004

**Sealed record identifier.** `kaal:research-observation:persona-protocol-v0.3:004`

**Internal software observation.** The reference slice implements deterministic multidomain ARI projections with challenge handling.

**Evidence class.** Internal software observation, not independently reproduced.

**Protocol.** TrustCarry Protocol v0.3, historically titled and aliased as Persona Protocol v0.3.

**Supporting passage from Persona Protocol v0.3.**

> deterministic multidomain ARI projections with challenge handling;

**Source locator.** Line 251 of the sealed v0.3 source.

**Source SHA-256.** `38efc43b80ab62426ca1f946114677afeda730bca30dda71dfd299223a6def7c`

**Implementation commit.** `a475f1ca9843f13bab55e79b8d387857cd0dd89a`

**License.** CC BY 4.0; attribute Wulf A. Kaal and cite the canonical record URL.

**Limit.** This observation reports internal behavior under synthetic fixtures. It is not external validation, independent reproduction, a security audit, or a scholarly claim-layer record.