{"endpoint":"POST /api/receipt/verify","free":true,"body":{"id":"<ledgerEntry.id>","txHash":"0x…"},"tiers":{"R0":"Not found / failed / pending","R1":"Paid in public ledger","R2":"Tx hash recorded","R3":"Settled via local or gateway facilitator (not demo)","R4":"Onchain-shaped hash + real facilitator mode","R5":"Arc RPC eth_getTransactionReceipt confirmed success (ledger or chain-only)"},"example":{"curl":"curl -sS -X POST https://keryxhq.xyz/api/receipt/verify -H 'content-type: application/json' -d '{\"txHash\":\"0xeccf6b588a2ab9d53efa100796eadcd930d5aa4a6525109d2dadf45ea4a3cab8\"}'"}}