Lifecycle Phase — Provenance Audit
6 PHASES · 18 VECTORS
Phase 1 — Pre-Work, Survey, Layout
The job hasn't broken ground. The money is already moving. Low-ball bids, suppressed geotech, and staking errors are all set in motion before the first shovel hits dirt. No AI system today signs what it saw at bid time — so the sub's knowledge of site conditions at award is permanently unverifiable.
CHANGE ORDER — UNFORESEEN CONDITIONS FRAUD
CO #47 — Rock at –14ft (bid set said –12ft)
Apex Foundation LLC claims rock was unanticipated. Geotech boring log B-7 in the bid set documented rock at –12ft. AI cross-referenced both documents at bid review. No signed receipt of that comparison exists — sub's CO cannot be disproven.
Submitted byApex Foundation LLC
CO amount$382,000
Boring log B-7rock at –12ft · bid set rev C
AI determinationknown at bid · not compensable
HIVE: AI receipt hashes boring log B-7 at bid time · CO denied · on record
BID STRATEGY — LOW-BALL THEN CHANGE ORDER
Bid $18.4M · CO recovery target $2.1M
Sub wins award with below-market number. Post-NTP change orders recover margin: RFI-driven scope creep, differing site condition claims, owner-furnished equipment deduct disputes. Pattern is only visible across the full CO trail.
Original bid$18,400,000
CO total to date$2,140,000 · 11.6%
Industry benchmark3–5% CO rate typical
HIVE: Every CO cross-referenced to bid-time AI review · pattern flagged at 8%
SURVEY / LAYOUT — STAKING PADDING
Layout survey billed 3x — same control points
Survey sub bills for three independent layout sessions. Field logs show same control monuments used each time. AI reviewed daily reports and GPS data logs — no signed record of what the model compared across sessions.
Sessions billed3 × $12,400 = $37,200
Control point delta0 — same monuments
HIVE: GPS log hash + daily report hash signed at each session · duplicates surface
Phase 2 — Earthwork, Forms, Rebar, Concrete
The structure is being set. Concrete PSI, rebar quantity and grade, and anchor bolt specifications are structural commitments that cannot be inspected after pour. Falsified batch tickets and cylinder test manipulation have appeared in False Claims Act prosecutions. No AI approval today leaves a signed record of what it reviewed.
CONCRETE — PSI DOWNGRADE
4,000 psi spec → 3,000 psi batch tickets submitted
Structural drawings specify f'c = 4,000 psi for shearwall footings and grade beams. Concrete sub submits 3,000 psi batch tickets. 25% compressive strength reduction. AI reviewed delivery tickets — no hash of which batch records the model saw.
Specified f'c4,000 psi · ACI 318
Submitted3,000 psi · 25% reduction
Per-yard savings~$18/CY · 1,400 CY = $25,200
Cylinder testresults delayed · lab TBD
HIVE: Batch ticket hashes signed at pour · PSI deviation flagged immediately
REBAR — OMISSION (FALSE CLAIMS ACT PATTERN)
Required #5 bars omitted — column cage incomplete
Documented in federal prosecution cases: concrete columns poured without the rebar specified in structural drawings. Bar is billed in the schedule of values, listed on pay app, and physically absent. After pour, there is no inspection path. Hive intercepts the pour clearance decision.
SpecGrade 60 #5 at 12in OC · ASTM A615
Risk exposurestructural collapse · FCA liability
Detection windowbefore pour only
HIVE: Pour clearance signed receipt includes rebar photo hash + mill cert hash
ANCHOR BOLTS — GRADE SUBSTITUTION
F1554 Grade 55 → Grade 36 delivered (−34% yield)
Structural engineer specified ASTM F1554 Grade 55 anchor bolts for holdown and shearwall attachment. Grade 36 bolts physically identical in appearance. Yield strength 36 ksi vs. 55 ksi required. Sub saves ~$0.40/bolt on 2,800 bolts = $1,120. Structural consequence is non-trivial.
SpecifiedF1554 Gr55 · 55 ksi yield
DeliveredF1554 Gr36 · 36 ksi yield · −34%
Sub savings$1,120 on 2,800 bolts
HIVE: Mill cert hash signed at delivery · grade mismatch caught before embed
Phase 3 — Rough-In MEP (Plumbing, Electrical, Sewer)
Walls are open. Every trade is billing. Pay app front-loading, time-and-material invoice padding, and percent-complete inflation are the dominant fraud vectors here. The AI validates — but with no signed record of what photos it reviewed or what percentage it calculated, every approval is unverifiable after the fact.
PAY APP — SIGNING NOW
Pay App #8 — MEP Rough-In · $1.24M Draw
Mechanical sub requesting 75% complete draw. AI validated field photos, daily reports, and schedule of values across 14 cost codes. Verified completion: 73.4%. Approved draw adjusted accordingly.
Claimed complete75.0%
AI verified73.4%
Approved draw$1,209,200
Withheld$30,800 · 1.6pt delta
Modelhive-payapp-v1.1
RECEIPT SIGNED · ML-DSA-65 · ANCHORING TO BASE
PAY APP — FRONT-LOADING
Electrical SOV over-weighted early cost codes
Electrical sub's schedule of values allocates 38% of contract value to mobilization and rough-in, which is 60% complete at payment. Remaining 62% of value covers finish work — creates negative cash position for owner in final 20% of job.
SOV early codes38% of $4.1M = $1.56M
Actual cost weight~22% of job cost
Owner exposure$660K overpayment risk
HIVE: SOV structure hashed at NTP · deviation from cost curve flagged at each app
T&M — LABOR PADDING
Plumbing T&M invoices — labor hours not performed
Plumbing sub on time-and-material for change order work. Invoices 11 crew members for a 3-day RFI resolution. Foreman daily reports show 6 crew on site. 5 crew billed at prevailing wage for work they did not perform. No cap on T&M scope.
Billed crew11 × 3 days × $185/hr = $39,600
Daily report crew6 on site · verified
Overcharge~$18,000 on this invoice
HIVE: Daily report hash + badge scan signed · crew delta catches padding at invoice
Phase 4 — Vertical, Framing, Roof, Weather-In
The structure goes vertical. Holdown substitutions, lumber grade swaps, floor rod density fraud, and roofing membrane thickness are all field decisions made before inspection. Most are never caught. The AI reviewing submittals today leaves no record of what product data sheets it compared.
FRAMING — HOLDOWN SUBSTITUTION
Simpson Strong-Tie HDUE13 → MiTek PHD5 (312 units)
Engineer of record specified Simpson HDUE13. Shearwall design loads calculated to ICC-ES ESR-2114 table values. Framing sub submitted MiTek PHD5 as "approved equal." Different ICC-ES report, different load table basis. AI reviewed submittals — no hash of which ESR reports it compared.
SpecifiedSimpson HDUE13 · ESR-2114
Submitted subMiTek PHD5 · different ESR
EOR approvalnot obtained · required
Sub savings$18/unit · $5,616 total
HIVE: ESR report hashes signed · equivalency determination on record · EOR required
FRAMING — FLOOR ROD DENSITY
Hilti rod system — 4ft OC spec · 8ft OC installed
Spec requires Hilti floor rod anchoring system at 4-foot on-center. Field installed at 8-foot — half the specified density. No substitution request. No RFI. Clearance approved off field photos that did not show rod spacing. $51,400 in the sub's pocket on one floor.
Specified OC4ft · per structural drawings
Installed OC8ft · no submittal · no RFI
Exposure per floor$51,400
HIVE: Field clearance signed receipt hashes install photos · spacing deviation caught
ROOFING — MEMBRANE THICKNESS
GAF EverGuard TPO 60-mil → 45-mil submitted
Spec section 07540 requires GAF EverGuard TPO 60-mil membrane with 30-year NDL warranty. Roofing sub submits 45-mil as equal. Warranty reduced from 30yr to 15yr without disclosure. Thickness below spec reduces puncture resistance and wind uplift rating.
SpecifiedGAF EverGuard 60-mil · 30yr NDL
Submitted45-mil · 15yr warranty
Warranty delta15yr lost · not disclosed
HIVE: Product data sheet hashes signed · warranty and thickness on record
Phase 5 — Exterior Treatments
Cladding, windows, and waterproofing go on. Glazing downgrades in coastal or high-wind zones, waterproofing membrane substitutions, and below-grade warranty voids create latent defect liability that surfaces years after project closeout. These decisions are invisible to the owner at the time.
WINDOWS — GLAZING DOWNGRADE
Impact-rated → standard glazing in coastal zone
Spec requires ASTM E1886/E1996 impact-rated glazing for coastal jurisdiction — wind zone D. Sub submits standard dual-pane units as equivalent. Fails impact test. Building permit requires impact glazing by code. Sub saves ~$110/light on 340 units = $37,400.
SpecifiedASTM E1886/E1996 impact · zone D
Submittedstandard dual-pane · no impact rating
Code complianceFAIL · coastal jurisdiction
Sub savings$37,400 on 340 units
HIVE: ASTM certification hash signed · impact rating on record · code req flagged
WATERPROOFING — BELOW-GRADE MEMBRANE
Tremco ExoAir 230 → generic STPE sealant
Spec division 07 requires Tremco ExoAir 230 air/vapor barrier for below-grade walls and penetrations. Sub substitutes generic STPE (silyl-terminated polyether) product. Warranty void. Manufacturer's technical rep approval not obtained as required by spec section 07270.
SpecifiedTremco ExoAir 230 · div 07270
Substitutedgeneric STPE · no warranty
Tech rep approvalnot obtained · spec required
HIVE: Product data sheet + warranty doc hashed · approval record required at sign-off
CLADDING — FIELD MEASUREMENT PADDING
Stucco quantity billed 12% over field measure
Plastering sub bills 38,400 SF of stucco. AI-assisted quantity takeoff from drawing set: 34,200 SF. Delta: 4,200 SF at $9.40/SF = $39,480. Sub claims field conditions required additional material. No signed record of the AI's takeoff calculation or which drawing revision it read.
Billed SF38,400 SF
AI takeoff34,200 SF · drawing rev D
Exposure$39,480 overbilled
HIVE: Takeoff calculation signed · drawing rev and area calc on record
Phase 6 — Interior Treatments
The building is closing out. Every finish trade is billing. Subfloor substitutions, paint grade downgrades, tile underlayment omissions, and final CO padding are the last extraction points. Owners are exhausted by closeout. Approvals happen fast. Receipts still don't exist.
SUBFLOOR — PANEL SUBSTITUTION
3/4" Advantech plywood → commodity OSB
Spec section 06100 requires 3/4-inch Huber Advantech tongue-and-groove subfloor panels for tile-finish areas — deflection limit L/360 per tile spec 09300. Sub substitutes commodity OSB. OSB moisture performance and stiffness below Advantech spec. Tile installation conflict at closeout.
Specified3/4" Advantech T&G · L/360
Substitutedcommodity OSB · moisture risk
Tile conflictspec section 09300 · deflection
HIVE: Material delivery hash signed · product mismatch flagged before tile install
PAINT — FINISH GRADE DOWNGRADE
Spec Level 5 drywall finish → Level 3 applied
Finish schedule requires Level 5 gypsum board finish (skim coat) for painted walls in tenant areas. Painting sub applies Level 3 (tool mark free). Level 5 is required for critical lighting conditions — glare reveals texture defects. Labor cost difference: $1.80/SF on 84,000 SF = $151,200 pocketed.
SpecifiedLevel 5 · GA-214 · skim coat
AppliedLevel 3 · visible under raking light
Sub savings$151,200 on 84,000 SF
HIVE: Field inspection AI photo hash signed · finish grade assessment on record
TILE — UNDERLAYMENT OMITTED
Schluter Ditra membrane skipped in wet areas
Spec and manufacturer requirement: Schluter Ditra uncoupling membrane under tile in all wet areas — showers, bathrooms, mechanical rooms. Tile sub omits membrane entirely. Tile cracking within 18 months. Membrane cost: $1.20/SF. Tile replacement after failure: $28/SF. Sub saves $19,200, owner pays $448,000 in 18 months.
RequiredSchluter Ditra · all wet areas
Installednone · direct bond to substrate
Failure cost$448,000 at 18 months
Sub savings$19,200
HIVE: Pre-tile inspection signed receipt · substrate and membrane documented
Don't have the agentic skill in-house?
Mint a Hive Agent for your project
Don't have a platform running AI on submittals and change orders yet?
Mint a Hive agent — we provision the inference, you get the signed receipts.
No internal AI team required. Plugs into Procore or Autodesk in days.
MINT YOUR AGENT →
USDC · Base · $250K/yr flat · 2M receipt cap
Current State — No Provenance Layer
receipts signed today: 0
Engineer of Record
Spec Issued
Simpson HDUE13 · 4000 psi concrete · 3/4" plywood subfloor
Sub Submittal
Substitution Submitted
MiTek PHD5 · 3000 psi · OSB · AI reviews · no record kept
Field Installed
No Provenance
substitutes installed · pay app cleared · no signed proof
Project Specification
Spec + Drawing Set
drawing rev D · spec section 06100 · locked
Hive Intercept Layer
Intercept + Sign
ML-DSA-65 · SHA-3 · post-quantum
Decision Context
Input Hash
SHA-3 · spec + submittal + geotech
Hive Signer
ML-DSA-65
Post-quantum · NIST FIPS 204
Signed Receipt
rc_47291_f3a8b2
Immutable · tamper-evident · arbitration-ready
Base Mainnet
On-Chain Anchor
USDC · block 127,443,881
Every job has the same playbook. The spec says one thing. The submittal says another. The AI approves it. Nobody signed anything.
Substitution Audit Log + Signed Receipt
3 FLAGGED
What this log proves
Every AI decision — change order review, submittal approval, pay app validation —
generates a cryptographically signed receipt.
The receipt captures exactly what the model saw: which drawing revision,
which spec section, which product data sheet, which geotech report.
If the sub falsified inputs, the receipt proves it.
If the GC approved anyway, the receipt proves that too.
Live Substitution Audit Feed
09:44:11 · SIGNED Holdown — Simpson HDUE13 → MiTek PHD5
FLAGGED: different ICC-ES report · EOR approval req'd · 312 units
rc_41991_d4e7c3 · Base block 127,443,218
FLAGGED: different ICC-ES report · EOR approval req'd · 312 units
rc_41991_d4e7c3 · Base block 127,443,218
09:21:58 · SIGNED Concrete — 4,000 psi spec → 3,000 psi batch ticket
FLAGGED: 25% compressive strength reduction · structural review required
rc_41882_c7d3a1 · Base block 127,441,201
FLAGGED: 25% compressive strength reduction · structural review required
rc_41882_c7d3a1 · Base block 127,441,201
08:47:33 · FLAGGED Subfloor — 3/4" plywood spec → OSB commodity panels
Deflection risk for tile install · spec section 09300 conflict
pending signature · review required
Deflection risk for tile install · spec section 09300 conflict
pending signature · review required
Latest Signed Receipt
receipt_idrc_47291_f3a8b2
projectMeridian Tower — Phase 2
decision_typepay_app_validation
submitted_byApex Mechanical LLC
ai_modelhive-payapp-v1.1
claimed_pct75.0%
verified_pct73.4%
approved_draw$1,209,200
input_hashsha3:9c4f…a872
signatureML-DSA-65
sig_bytes3,293 bytes
anchoredBase · USDC
block127,443,881
tx_hash0x4a1c…f882
verify_ms7.3ms
timestamp—
Dispute Defense Trail
Change Order Integrity
FLAGGED
CO #47 claims unforeseen rock at –14ft. Hive receipt proves AI reviewed geotech boring log B-7 in the original bid set — rock documented at –12ft below grade. The signed receipt identifies the exact document hash the model read. Sub knew. The receipt is the arbitration exhibit.
context: sha3:7f4a…c291 · geotech_bid_rev3.pdf · 4.1ms
ML-DSA-65 Signature
SIGNED
Post-quantum signature per NIST FIPS 204. Binds model decision to specific drawing revision, spec section, and product data sheet. If any input was altered, the signature fails. Provably.
sig: ML-DSA-65:0x9c4f…a872 · 1.1ms
Base Mainnet Anchor
ANCHORED
Receipt hash written to Base. Block timestamp and tx hash are permanent, public, held by no single party. No GC server holds the only copy. The blockchain is the neutral arbitrator.
tx: 0x4a1c…f882 · block 127,443,881
Owner Protection Layer
ACTIVE
Every AI-assisted approval on this project — from subcontractor prequalification to final pay app — is independently verifiable by the owner. No GC controls the record. The receipt chain is the audit.
scope: spec-to-field · all phases · all subs · all COs · all pay apps