{"slug":"agentsvc-io-api-v1-proxy-btc-timestamp-79199e","title":"Timestamp anything on Bitcoin with OpenTimestamps","host":"agentsvc.io","method":"POST","resource":"https://agentsvc.io/api/v1/proxy/btc-timestamp","category":"other","description":"Timestamp anything on Bitcoin with OpenTimestamps: send text, a SHA-256 hash or a URL and get a standard .ots proof (base64). Only a salted hash leaves our server. The public calendars anchor it in a Bitcoin block within hours; then btc-timestamp-verify returns the block and the complete proof, whic","price_listed":0.005,"price_asked":null,"state":"effects","state_label":"Not tested: has real-world effects","checks_7d":0,"answered_7d":0,"latency_ms_median":null,"reported_calls_30d":3,"reported_payers_30d":2,"networks":["eip155:137","eip155:42161","eip155:8453","solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp"],"badge":"unverified","paid_checks_7d":0,"paid_ok_7d":0,"example_input":{"body":{"text":"Contract draft v3, agreed 2026-10-11"},"bodyType":"json","method":"POST","type":"http"},"output_schema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"input":{"additionalProperties":false,"properties":{"body":{"properties":{"hash":{"description":"SHA-256 hex, alternative to text","type":"string"},"text":{"description":"Content to timestamp (hashed with SHA-256)","type":"string"},"url":{"description":"Timestamp the exact bytes this URL returns now","type":"string"}},"required":[]},"bodyType":{"enum":["json","form-data","text"],"type":"string"},"method":{"enum":["POST","PUT","PATCH"],"type":"string"},"type":{"const":"http","type":"string"}},"required":["type","method","bodyType","body"],"type":"object"},"output":{"properties":{"example":{"properties":{"data":{"properties":{"calendars":{"type":"array"},"next_step":{"type":"string"},"ots_base64":{"type":"string"},"sha256":{"type":"string"},"status":{"type":"string"}},"type":"object"},"success":{"type":"boolean"}},"required":["success","data"],"type":"object"},"type":{"type":"string"}},"required":["type"],"type":"object"}},"required":["input"],"type":"object"},"history":[],"description_full":"Timestamp anything on Bitcoin with OpenTimestamps: send text, a SHA-256 hash or a URL and get a standard .ots proof (base64). Only a salted hash leaves our server. The public calendars anchor it in a Bitcoin block within hours; then btc-timestamp-verify returns the block and the complete proof, which anyone can check with the open-source ots tool. For contracts, AI outputs, datasets, invoices and web evidence.","last_updated":"2026-10-11T11:58:12.91Z","schemes":["exact"]}