David Ossman
type: MusicGroup
description: David Ossman (born December 6, 1936, in Santa Monica) is an American writer and comedian, best known as a member of the Firesign Theatre and screenwriter of such films as Zachariah. Early life Ossman
popularity: 3
followers: 10
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x47f8e12aaa58509a071da700de937ddd3ee0efcd31a06031aedcbd368421578d
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954035
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954035
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3cc2e937-de17-4d97-b1a2-28cfc649fc8b.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3cc2e937-de17-4d97-b1a2-28cfc649fc8b.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/3cc2e937-de17-4d97-b1a2-28cfc649fc8b
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T02:39:28Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x47f8e12aaa58509a071da700de937ddd3ee0efcd31a06031aedcbd368421578d","name":"David Ossman","registered_at":"2026-06-16T11:04:23Z","symbol":"NIM1032011","token_address":"0xdf176ad5b7f7745d1e20eb2ed5a7ee5e92e8ec8a","type":"artist","uuid":"3cc2e937-de17-4d97-b1a2-28cfc649fc8b"}
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 0x47f8e12aaa58509a071da700de937ddd3ee0efcd31a06031aedcbd368421578d. 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/3cc2e937-de17-4d97-b1a2-28cfc649fc8b.json and https://artists.proofprofile.net/proofs/artist/3cc2e937-de17-4d97-b1a2-28cfc649fc8b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0x47f8e12aaa58509a071da700de937ddd3ee0efcd31a06031aedcbd368421578d","name":"David Ossman","registered_at":"2026-06-16T11:04:23Z","symbol":"NIM1032011","token_address":"0xdf176ad5b7f7745d1e20eb2ed5a7ee5e92e8ec8a","type":"artist","uuid":"3cc2e937-de17-4d97-b1a2-28cfc649fc8b"}