← The evidence ledger
Evidence row 120005
Observed , by baseline/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://saylorinnovations.com/api/health/life-expectancy
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- e2269b45788bfa135cb42219aab0519a5967fc2396374821b6098352c4d1d6ca
- Leaf
- 0x3d4c7e043f1a1b33fc0ccacbb2fc239d5616e4f98f885ad19dceb81a8277a72d
What was observed
{
"endpoints": [
[
"x402",
"https://saylorinnovations.com/api/health/life-expectancy"
]
],
"name": "Saylor Innovations Data Desk",
"owner_address": "0xa2a8df0f7caabea4e120a2568118f141569fc8aa",
"raw": {
"accepts": [
{
"amount": "10000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"assetTransferMethod": "eip3009",
"facilitatorOnly": true,
"memo": "saylor:datadesk:life-expectancy-",
"name": "USD Coin",
"note": "Base settles through an x402 facilitator. Send payload.signature and payload.authorization (EIP-3009); there is no self-submitted path on this network.",
"version": "2"
},
"maxTimeoutSeconds": 120,
"network": "eip155:8453",
"payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
"scheme": "exact"
},
{
"amount": "10000",
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"assetTransferMethod": "eip3009",
"facilitatorOnly": true,
"memo": "saylor:datadesk:life-expectancy-",
"name": "USD Coin",
"note": "Polygon settles through an x402 facilitator. Send payload.signature and payload.authorization (EIP-3009); there is no self-submitted path on this network.",
"version": "2"
},
"maxTimeoutSeconds": 120,
"network": "eip155:137",
"payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
"scheme": "exact"
},
{
"amount": "10000",
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"extra": {
"assetTransferMethod": "eip3009",
"facilitatorOnly": true,
"memo": "saylor:datadesk:life-expectancy-",
"name": "USD Coin",
"note": "Arbitrum settles through an x402 facilitator. Send payload.signature and payload.authorization (EIP-3009); there is no self-submitted path on this network.",
"version": "2"
},
"maxTimeoutSeconds": 120,
"network": "eip155:42161",
"payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
"scheme": "exact"
},
{
"amount": "10000",
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM",
"memo": "saylor:datadesk:life-expectancy-",
"reference": "8zsobxbA9umW3c6PdytQb6qfzZrbuRzzbPVRrL8Y9vU5",
"session": "eyJhcnRpY2xlSWQiOiJkYXRhZGVzazpsaWZlLWV4cGVjdGFuY3ktdXMiLCJyZWZlcmVuY2UiOiI4enNvYnhiQTl1bVczYzZQZHl0UWI2cWZ6WnJidVJ6emJQVlJyTDhZOXZVNSIsInJlY2lwaWVudCI6IjdMU2pmckpmOGZOc0I4VkE5dTdOM1dFbjI1c21RTHBvYjNTdnlVdlhhY3k3IiwibWludCI6IkVQakZXZGQ1QXVmcVNTcWVNMnFOMXh6eWJhcEM4RzR3RUdHa1p3eVREdDF2IiwibWluQW1vdW50IjoxMDAwMCwiZXhwIjoxNzkyNTkyMjE1MDk3fQ.TMxMdT4NWTORpAlhEImoavqDF6XLWUDBTehUZcLUTrs"
},
"maxTimeoutSeconds": 120,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"scheme": "exact"
},
{
"amount": "10000",
"asset": "Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB",
"extra": {
"feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM",
"memo": "saylor:datadesk:life-expectancy-",
"reference": "64NMYgjhw46ceunEykQ8VX1TwwLHBX5UFbf7h5bmURn9",
"session": "eyJhcnRpY2xlSWQiOiJkYXRhZGVzazpsaWZlLWV4cGVjdGFuY3ktdXMiLCJyZWZlcmVuY2UiOiI2NE5NWWdqaHc0NmNldW5FeWtROFZYMVR3d0xIQlg1VUZiZjdoNWJtVVJuOSIsInJlY2lwaWVudCI6IjdMU2pmckpmOGZOc0I4VkE5dTdOM1dFbjI1c21RTHBvYjNTdnlVdlhhY3k3IiwibWludCI6IkVzOXZNRnJ6YUNFUm1KZnJGNEgyRllENEtDb05rWTExTWNDZThCZW53TllCIiwibWluQW1vdW50IjoxMDAwMCwiZXhwIjoxNzkyNTkyMjE1MDk3fQ.jBdUUZJwTY2q8_hAS520_H-JYG0x3a06ppRrz7KefhQ"
},
"maxTimeoutSeconds": 120,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"scheme": "exact"
},
{
"amount": "91164",
"asset": "So11111111111111111111111111111111111111112",
"extra": {
"memo": "saylor:datadesk:life-expectancy-",
"native": true,
"note": "Native SOL: send lamports with a system transfer, not an SPL transfer. Price is quoted live and this quote expires in 120s.",
"quotedLamports": "93984",
"reference": "DNamaXpreQcd7YWcmxdeuQ8vWRvRo7ptWgH5KyhUVBFw",
"session": "eyJhcnRpY2xlSWQiOiJkYXRhZGVzazpsaWZlLWV4cGVjdGFuY3ktdXMiLCJyZWZlcmVuY2UiOiJETmFtYVhwcmVRY2Q3WVdjbXhkZXVROHZXUnZSbzdwdFdnSDVLeWhVVkJGdyIsInJlY2lwaWVudCI6IjdMU2pmckpmOGZOc0I4VkE5dTdOM1dFbjI1c21RTHBvYjNTdnlVdlhhY3k3IiwibWludCI6bnVsbCwibWluQW1vdW50Ijo5MTE2NCwiZXhwIjoxNzkyNTkyMjE1MDk3fQ.N0Lyrp6HmLcN7yDIYNh_D6cVLAO9AKabAbxf946q5ns",
"solUsdPrice": 106.4
},
"maxTimeoutSeconds": 120,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"scheme": "exact"
}
],
"description": "US life expectancy at birth by year since 1900, by sex and race - years, death rate per 100,000, peak year and change over any period (CDC)",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"from": "2000",
"sex": "female",
"to": "2018"
},
"type": "http"
},
"output": {
"example": {
"change_years": 1.5,
"from_year": 2000,
"latest_life_expectancy_years": 81.2,
"note": "Life expectancy at birth in years and the age-adjusted death rate per 100,000 for the US population. The CDC series stops at 2018.",
"peak_life_expectancy_years": 81.3,
"peak_year": 2014,
"points": 19,
"race": "All Races",
"series": [
{
"death_rate_per_100k": 731.4,
"life_expectancy_years": 79.7,
"year": 2000
},
{
"death_rate_per_100k": 725.6,
"life_expectancy_years": 79.5,
"year": 2001
},
{
"death_rate_per_100k": 723.6,
"life_expectancy_years": 79.6,
"year": 2002
}
],
"sex": "Female",
"source": "CDC NCHS, Death rates and life expectancy at birth (data.cdc.gov dataset w9j2-ggv5), public domain",
"start_life_expectancy_years": 79.7,
"to_year": 2018
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"from": {
"description": "optional first year, 1900-2018, default 1950",
"type": "string"
},
"sex": {
"description": "optional both (default), male or female",
"type": "string"
},
"to": {
"description": "optional last year, 1900-2018, default 2018",
"type": "string"
}
},
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"change_years": {
"description": "Years gained or lost between first and last year",
"type": "number"
},
"from_year": {
"description": "First year returned",
"type": "number"
},
"latest_life_expectancy_years": {
"description": "Life expectancy at birth in the last year",
"type": "number"
},
"note": {
"description": "What the figures mean and where the series ends",
"type": "string"
},
"peak_life_expectancy_years": {
"description": "Life expectancy in that peak year",
"type": "number"
},
"peak_year": {
"description": "Year with the highest life expectancy in the range",
"type": "number"
},
"points": {
"description": "Number of yearly points",
"type": "number"
},
"race": {
"description": "Population group: All Races, White or Black",
"type": "string"
},
"series": {
"description": "Yearly points, oldest first",
"items": {
"properties": {
"death_rate_per_100k": {
"description": "Age-adjusted death rate per 100,000 people",
"type": [
"number",
"null"
]
},
"life_expectancy_years": {
"description": "Average years a newborn is expected to live",
"type": [
"number",
"null"
]
},
"year": {
"description": "Calendar year",
"type": [
"number",
"null"
]
}
},
"type": "object"
},
"type": "array"
},
"sex": {
"description": "Both Sexes, Male or Female",
"type": "string"
},
"source": {
"description": "Dataset the numbers come from and its license",
"type": "string"
},
"start_life_expectancy_years": {
"description": "Life expectancy at birth in the first year",
"type": "number"
},
"to_year": {
"description": "Last year returned",
"type": "number"
}
},
"required": [
"race",
"sex",
"series"
],
"type": "object"
},
"type": {
"const": "json",
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"iconUrl": "https://res.cloudinary.com/bdb-prod/image/upload/c_fill,ar_1:1,w_256,h_256,f_auto,q_auto/v1791811517/bazaar-icons/bc5e2b3d111ebbef.jpg",
"lastUpdated": "2026-10-21T14:14:55.156Z",
"quality": {
"l30DaysTotalCalls": 4,
"l30DaysUniquePayers": 3,
"lastCalledAt": "2026-10-21T14:14:54.73Z"
},
"resource": "https://saylorinnovations.com/api/health/life-expectancy",
"serviceName": "Saylor Innovations Data Desk",
"tags": [
"us life expectancy history",
"life expectancy by year",
"life expectancy men vs women",
"average lifespan united states",
"death rate by year"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "US life expectancy at birth by year since 1900, by sex and race - years, death rate per 100,000, peak year and change over any period (CDC)"
}What the leaf hashes
{"body":"e2269b45788bfa135cb42219aab0519a5967fc2396374821b6098352c4d1d6ca","id":120005,"kind":"listing","method":"baseline/1","observed_us":1793025617068586,"prev":null,"subject":"x402_bazaar:https://saylorinnovations.com/api/health/life-expectancy","subject_kind":"source_record"}Proof
Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of (296695 rows).
- 0x3d4c7f73b0bcb1ef5a206cdf21693c834865e7a9bff85c1bcd106c94e64134b0
- 0x2d7f252e5d008cd567b803460070fad0e4043fa8320f1a00d8edc1959f590679
- 0x4eed6dbe6d52d36e8fd4547a7d791c02fc2f16af6cedb7e5b939bfc6f0a3377c
- 0x7c45976ee0aa635801144b95a6be8148fdd17c81f09e2ff38515044a86bb0cab
- 0x26e7bdf3637b6a43dc2e827ee1317c907dd3c881c7f998f59a9f5d8764382770
- 0x86bdf7511c2092f24331f2d1b56d0776b30c0d36d8a162b1534c195bdbb1f42a
- 0x28b55b0c86c7c2808deddb56c13ece47aff90a5e964558b303665f36200b4a5f
- 0x3a267d8797d327fc66f4c0727956b7e47caee018ed8bfd6ee688dd7341ad6191
- 0xa92d7be66dafa41de83cde2ea4513dcc1222c5a1b23abdfacb088c81170a5989
- 0x46e925b5e825b92710b39bef7e87d883d131661462048f287a27325752df91f3
- 0xc900cc76dc3702a3e60eaef3577f119464a6a90c3e2b646253f2ba09c089de97
- 0xd04df0f7f3be4d014b4cea8172ada286fbcf5bcb32ae1b281704fd75627b661b
- 0x215f432600b78f2e7c9629cd10ce6ce4b7f3351b0b71f3f2c7dcb8e650f6cd63
- 0x7f594f5609f388d64d3cda87b5631d393ee8300bb09bad71f150113a5886ee33
- 0x4b52a97f7a80ff7778a702b85267b8d2e5c93ce160942656435c29ae7be68bf4
- 0x2e6a32eb32761c210560e852405e2f865f958ddbe01027894f8b9c1b3433b9f0
- 0x9a83be955a206deb65b995adfd92c58fa31c95fbbf926bd199d300e70b08b26d
- 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
- 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a
- Day root
- 0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
- Chained
- 0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
- Published
- On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae