NDF
type: MusicGroup
genre: minimal techno
description: NDF or ndf may refer to: Arts and entertainment , a German film production company; formed 1947 Neutral-density filter, in photography Finance Non-deliverable forward Nordic Development Fund
popularity: 2
followers: 296
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x31d638f2cdc2ae2d9bf2318974f6b162d6aab4abe48b3be35e8d177ff1f73743
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954516
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954516
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/9f63527f-ac8c-494e-b7ae-bef712ff2f63.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/9f63527f-ac8c-494e-b7ae-bef712ff2f63.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/9f63527f-ac8c-494e-b7ae-bef712ff2f63
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T07:04:44Z
additional property: OTSCanonicalRecord
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 0x31d638f2cdc2ae2d9bf2318974f6b162d6aab4abe48b3be35e8d177ff1f73743. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9f63527f-ac8c-494e-b7ae-bef712ff2f63.json and https://artists.proofprofile.net/proofs/artist/9f63527f-ac8c-494e-b7ae-bef712ff2f63.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T07:04:44Z
album: Since We Last Met (Radio Edit)
  type: MusicAlbum
  date published: 2007
album: Since We Last Met (Radio Edit)
  type: MusicAlbum
  date published: 2007
album: Since We Last Met (Ricardo Villalobos Remixes)
  type: MusicAlbum
  date published: 2010-08-30
album: Since We Last Met
  type: MusicAlbum
  date published: 2010-08-30
album: Since We Last Met
  type: MusicAlbum
  date published: 2010-08-30
album: Cruel Is the Color
  type: MusicAlbum
  date published: 2016-10-21
album: Cruel Is The Color
  type: MusicAlbum
  date published: 2016-10-28
album: Cruel Is The Color
  type: MusicAlbum
  date published: 2016-10-28