Paul Hammer
type: MusicGroup
description: Paul Hammer (13 July 1900 – 25 March 1978) was a Luxembourgish sprinter and long jumper. He competed at the 1920 and the 1924 Summer Olympics. His son, Fred Hammer, was also an athletics Olympian. R
popularity: 3
followers: 51
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x88cf78397db0c0aacd7068fbecf75b7e21346dd5afac9db73804d4375a593c29
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954066
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954066
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/6adbb3cd-c7f1-4663-9a7a-b4c713a286e3.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/6adbb3cd-c7f1-4663-9a7a-b4c713a286e3.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/6adbb3cd-c7f1-4663-9a7a-b4c713a286e3
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:11:48Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x88cf78397db0c0aacd7068fbecf75b7e21346dd5afac9db73804d4375a593c29","name":"Paul Hammer","registered_at":"2026-06-17T02:54:25Z","symbol":"NIM1258669","token_address":"0x54fa969b622ea0eaf805b6b397afbca3f890324f","type":"artist","uuid":"6adbb3cd-c7f1-4663-9a7a-b4c713a286e3"}
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88cf78397db0c0aacd7068fbecf75b7e21346dd5afac9db73804d4375a593c29. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6adbb3cd-c7f1-4663-9a7a-b4c713a286e3.json and https://artists.proofprofile.net/proofs/artist/6adbb3cd-c7f1-4663-9a7a-b4c713a286e3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0x88cf78397db0c0aacd7068fbecf75b7e21346dd5afac9db73804d4375a593c29","name":"Paul Hammer","registered_at":"2026-06-17T02:54:25Z","symbol":"NIM1258669","token_address":"0x54fa969b622ea0eaf805b6b397afbca3f890324f","type":"artist","uuid":"6adbb3cd-c7f1-4663-9a7a-b4c713a286e3"}