{"uid":"cap_pVIx7sHA_eqYXeaTkM_Zc","slug":"securaw-timechain2-file-timestamp-registration-delivery-proof-90feaf64","name":"Securaw TimeChain2 File Timestamp Registration (delivery_proof)","description":"Register a file SHA-256 with Securaw/TimeChain2 and receive a downloadable OpenTimestamps proof directly binding its original bytes. ZIP includes .ots, metadata and independent-verification instructions. Hash only; no file upload. Initial receipt is NOT Bitcoin confirmed. Check the status link for later anchoring; no guaranteed deadline, authorship or content-truth certification. Idempotency-Key required.","url":"https://www.securaw.com/cryptovar/x402/delivery_proof?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"service":{"enum":["delivery_proof"],"type":"string"},"parameters":{"type":"object","title":"DeliveryInput","required":["sha256"],"properties":{"sha256":{"type":"string","title":"Sha256","pattern":"^[0-9a-f]{64}$","description":"Lowercase SHA-256 of exact original bytes, computed locally. No filename or private content."}},"additionalProperties":false}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.05","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.05/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_qOf_IhwTL8R_RczWP8pzc","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.05","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Registers a file's SHA-256 hash with Securaw/TimeChain2 and returns a downloadable ZIP containing an OpenTimestamps proof, metadata, and independent verification instructions.","exampleAgentPrompt":"I need to timestamp the file I just hashed — its SHA-256 is 3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b — please register it with Securaw TimeChain2 and give me the OpenTimestamps proof ZIP.","exampleUseCases":[{"title":"Notarizing a signed contract","prompt":"I have a signed NDA and its SHA-256 is 9f86d081884c7d659a2feaa0c55ad015a3bf4f1b2b0b822cd15d6c15b0f00a8 — can you register it with Securaw TimeChain2 so I have a blockchain timestamp proving it existed today?"},{"title":"Proving research data integrity","prompt":"Before I publish my dataset, I want to timestamp its hash so reviewers can verify it hasn't changed — the SHA-256 is b94f6f125c79e3a5ffaa826f584c10d52ada669e6762051b826b55776d7a91b3. Please send it to Securaw for an OpenTimestamps proof."},{"title":"Archiving software release hash","prompt":"We're releasing v2.1.0 of our software and I want a tamper-evident timestamp for the release bundle — the SHA-256 is 2c624232cdd221771294dfbb310acbc7c3c6f0c929e5fdfc800c9a43e2dc3df. Get me the .ots proof from Securaw TimeChain2."}],"resultDescription":"A downloadable ZIP archive containing: a .ots (OpenTimestamps) proof file binding the submitted SHA-256 to a TimeChain2 event, associated metadata about the registration, independent verification instructions, and a status link to check when the proof is later anchored to the Bitcoin blockchain. The initial receipt is not yet Bitcoin-confirmed; Bitcoin anchoring occurs later with no guaranteed deadline.","failureModes":["Invalid SHA-256 format (not 64 lowercase hex characters) returns a validation error","Missing Idempotency-Key header causes request rejection","Duplicate submission with same Idempotency-Key returns cached result rather than error","Bitcoin anchoring is not immediate — initial proof is pending confirmation","No guarantee of specific anchoring deadline; status must be checked separately"],"whenToPreferThis":"Choose this endpoint when you need a hash-only (no file upload) cryptographic proof of existence for a document or file, specifically an OpenTimestamps-format .ots proof anchored via Securaw's TimeChain2 service. Prefer this over generic blockchain notarization services when you want an open, independently-verifiable OpenTimestamps proof bundled with verification instructions at low per-call cost ($0.05 USDC). Ideal when file privacy is important since only the SHA-256 is transmitted.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-20T12:31:33.540Z","isFirstParty":false,"canonicalSlug":"securaw-timechain2-file-timestamp-registration-delivery-proof-90feaf64"}