David Blum
type: MusicGroup
genre: chamber music
genre: classical
description: David Blum is an American writer and editor. Blum was born in Queens, New York, and graduated with a degree in English literature from the University of Chicago in 1977. He began his career as a rep
popularity: 8
followers: 96
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x489aef07221798de5556051ca7e6c4c4ad09a88fb910e54e7c22f5bc37ae3c04
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953938
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953938
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1fbeacb2-ff8a-4dbd-9722-4b28fce22360.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1fbeacb2-ff8a-4dbd-9722-4b28fce22360.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/1fbeacb2-ff8a-4dbd-9722-4b28fce22360
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T11:35:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x489aef07221798de5556051ca7e6c4c4ad09a88fb910e54e7c22f5bc37ae3c04","name":"David Blum","registered_at":"2026-06-16T00:54:13Z","symbol":"NIM0886309","token_address":"0x09fbb237612a548240df74f5a1b785c382f274aa","type":"artist","uuid":"1fbeacb2-ff8a-4dbd-9722-4b28fce22360"}
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489aef07221798de5556051ca7e6c4c4ad09a88fb910e54e7c22f5bc37ae3c04. Chain 2 (Bitcoin): anchored in block 953938 (2026-06-16T11:35:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1fbeacb2-ff8a-4dbd-9722-4b28fce22360.json and https://artists.proofprofile.net/proofs/artist/1fbeacb2-ff8a-4dbd-9722-4b28fce22360.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T11:35:56Z
  text: {"copyright_id":"0x489aef07221798de5556051ca7e6c4c4ad09a88fb910e54e7c22f5bc37ae3c04","name":"David Blum","registered_at":"2026-06-16T00:54:13Z","symbol":"NIM0886309","token_address":"0x09fbb237612a548240df74f5a1b785c382f274aa","type":"artist","uuid":"1fbeacb2-ff8a-4dbd-9722-4b28fce22360"}
album: Deine Zeit
  type: MusicAlbum
  date published: 2018-02-14