The most disputed call in sports cars, shows its work.
Balance of Performance is the single most-litigated decision in sports-car racing. Every cycle, every manufacturer believes the call went against them, and the supporting evidence is a spreadsheet defended in PDFs. Hive ships a signed receipt for every BoP adjustment with the telemetry hash it was derived from, the rule version that produced it, the steward who signed it, and the manufacturer counter-signatures of record. The decision shows its work. The dispute resolves at the verifier.
BoP, in four numbers.
Five variables move on every cycle: minimum weight, power-curve cap, fuel-flow cap, refuel time, and torque sensor calibration. Today the call lands in a Friday email. With Hive each variable is its own receipt, with the telemetry it was derived from, the rule version that controlled it, and the manufacturer’s signed acknowledgement attached.
One cycle. Eleven manufacturers. Fifty-five receipts.
Manufacturer names are placeholders. The receipt schema, signature path, and verifier output match the live production format. Each row is five signed receipts (one per variable) folded into a single manufacturer view.
| Manufacturer | Class | Min weight Δ | Power Δ | Fuel flow Δ | Refuel Δ | Torque cal Δ | Status |
|---|---|---|---|---|---|---|---|
| Manufacturer X | GTP | +10 kg | — | −0.2 kg/s | — | — | SIGNED |
| Manufacturer Y | GTP | −5 kg | +8 kW | — | — | — | SIGNED |
| Manufacturer Z | GTP | — | −6 kW | — | — | — | SIGNED |
| Manufacturer W | GTP | +5 kg | — | — | +0.4 s | — | SIGNED |
| Manufacturer V | GTP | −8 kg | — | — | — | +1.2 % cal | SIGNED · FLAG |
| Manufacturer U | GTD-Pro | +12 kg | — | — | — | — | SIGNED |
| Manufacturer T | GTD-Pro | — | −4 kW | — | — | — | SIGNED |
| Manufacturer S | GTD-Pro | −4 kg | — | +0.15 kg/s | — | — | SIGNED |
| Manufacturer R | GTD | +6 kg | — | — | — | — | SIGNED |
| Manufacturer Q | GTD | — | +5 kW | — | — | — | SIGNED |
| Manufacturer P | GTD | +3 kg | — | −0.1 kg/s | — | — | SIGNED |
Flag on Manufacturer V is a real-life pattern: torque-sensor calibration drift is the most common dispute trigger in GTP. With Hive the flag is a parent-referenced delta receipt the manufacturer’s engineer can verify against the raw sensor stream before the BoP review opens.
Five steps. Five signed transitions.
Telemetry committed.
Per-car telemetry from the prior round is merklized. The Merkle root is the BoP input fixture.
Rule version pinned.
The active rule version (e.g. GTP-2026.07.b) is hashed and bound to the input fixture in a signed pin receipt.
Adjustments computed.
Five deltas per manufacturer derived from the input fixture under the pinned rule. Each delta is a signed payload.
Manufacturer counter-signs.
Each manufacturer’s technical director attaches an Ed25519 counter-signature, with optional dissent note.
Verifiable at the steward’s desk.
When the call is disputed, the steward opens the verifier, pastes the receipt URN, and the chain resolves to the telemetry root in a browser.
One adjustment, one signed JSON.
Reduced for clarity. The production receipt also carries the per-corner telemetry slice hash and the rule-version diff against the previous cycle.
"protocol": "hive-motorsport/1", "urn": "urn:hive:motorsport:imsa:bop:7c1f0a4b9d8e2516", "class": "bop_adjustment", "issuer_did": "did:hive:imsa-tech-001", "issuer_role": "series_tech", "issued_at": "2026-05-25T22:08:14Z", "payload": { "cycle": "imsa.wtsc.2026.cycle.07", "manufacturer_did": "did:hive:mfr-x", "class": "GTP", "variable": "minimum_weight", "unit": "kg", "prior_value": 1050, "new_value": 1060, "delta": "+10", "rule_version": "GTP-2026.07.b", "telemetry_root": "sha256:c4f2...9b18" }, "parent_ref": { "urn": "urn:hive:motorsport:imsa:bop-input:cycle-07", "canonical_sha256": "qZ8L...Vd2" }, "canonical_sha256": "9Hn...0sB", "issuer_pubkey": "ed25519:i6-Wo01AwSD1eAhSSC3e3VCTEYFXehGNOVdC5iobuBc", "signature": "ed25519:9k...P2", "counter_signatures": [ { "role": "manufacturer_tech_director", "signature": "ed25519:mt...A7", "dissent": "" } ]
What the install changes for IMSA tech.
| Layer | Today | With Hive |
|---|---|---|
| BoP evidence | Spreadsheet plus a defending PDF | Signed receipt per variable, telemetry-anchored, rule-pinned |
| Manufacturer acknowledgement | Friday email reply | Ed25519 counter-signature with optional dissent note |
| Dispute path | Phone call to series tech, optional steward hearing | Verifier run in a browser, hearing opens with both signatures attached |
| Cross-season audit | Twelve cycles in twelve folders | Season ledger of 660 signed receipts, queryable by manufacturer or variable |
Hour 6 at Daytona. The class leader is on TV. The manufacturer wants in deeper. Right now. Sign it.
BoP is the receipt for sporting integrity. There is a second receipt the paddock has never had: the one for what the camera actually shows, what the class lead is worth in the moment, and what the sponsor owes the team when the race delivers. Today the Michelin Endurance Cup awards points at hour 6, 12, 18, and finish — sporting checkpoints, not commercial ones. Mobil 1 ran a special livery on the Porsche 963 at Sebring for thirty years of partnership; the activation was set months in advance. Hive lets manufacturer and sponsor money respond to the race as the race produces it.
One channel. The same primitives clear payroll, regulatory filings, supply-chain handoffs, and AI agent rentals on every other Hive vertical. The motorsport receipt format is the same receipt format the FIA reads, the same receipt format an OEM signs at the manufacturing line.
If you take one line from this page.
Balance of Performance is the most disputed call in sports cars. Hive makes it show its work.
The receipt is the artifact IMSA technical, the manufacturers, and the stewards have all been operating without. It does not change who makes the call. It changes what the call comes with. The call comes with proof.