David Friedman
type: MusicGroup
genre: new age
popularity: 2
followers: 92
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x35f196b5dce49f9b11d46e37a892ed872d5f08e9eb477ec817787be3a269f768
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953857
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953857
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/022c194c-be15-4013-894e-04cb65f5afbe.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/022c194c-be15-4013-894e-04cb65f5afbe.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/022c194c-be15-4013-894e-04cb65f5afbe
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T23:34:38Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x35f196b5dce49f9b11d46e37a892ed872d5f08e9eb477ec817787be3a269f768","name":"David Friedman","registered_at":"2026-06-15T14:25:46Z","symbol":"NIM0736352","token_address":"0x3141279812232a96aafb5f66ce8bea5dd3a7d39b","type":"artist","uuid":"022c194c-be15-4013-894e-04cb65f5afbe"}
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 0x35f196b5dce49f9b11d46e37a892ed872d5f08e9eb477ec817787be3a269f768. Chain 2 (Bitcoin): anchored in block 953857 (2026-06-15T23:34:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/022c194c-be15-4013-894e-04cb65f5afbe.json and https://artists.proofprofile.net/proofs/artist/022c194c-be15-4013-894e-04cb65f5afbe.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-15T23:34:38Z
  text: {"copyright_id":"0x35f196b5dce49f9b11d46e37a892ed872d5f08e9eb477ec817787be3a269f768","name":"David Friedman","registered_at":"2026-06-15T14:25:46Z","symbol":"NIM0736352","token_address":"0x3141279812232a96aafb5f66ce8bea5dd3a7d39b","type":"artist","uuid":"022c194c-be15-4013-894e-04cb65f5afbe"}
album: Moonrise
  type: MusicAlbum
  date published: 1997
album: Stirring of the Breeze
  type: MusicAlbum
  date published: 2009-07-18