Sheff
type: MusicGroup
genre: minimal techno
genre: progressive house
description: Sheff may refer to: People: David Sheff, American author of books Don Sheff (born 1931), American former competition swimmer Robert Nathan Sheff (born 1945), avant-garde composer and pianist Stanley
popularity: 5
followers: 431
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x9881f6edd0083e58a25e998fecba980631353b8877088c96e9e35139126ea411
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954717
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954717
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f678b755-2861-4afc-8ec3-ca00a75f6d38.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f678b755-2861-4afc-8ec3-ca00a75f6d38.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/f678b755-2861-4afc-8ec3-ca00a75f6d38
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T15:47:51Z
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 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 0x9881f6edd0083e58a25e998fecba980631353b8877088c96e9e35139126ea411. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f678b755-2861-4afc-8ec3-ca00a75f6d38.json and https://artists.proofprofile.net/proofs/artist/f678b755-2861-4afc-8ec3-ca00a75f6d38.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T15:47:51Z
album: Indigo
  type: MusicAlbum
  date published: 2010-02-09
album: Planet K
  type: MusicAlbum
  date published: 2010-03-26
album: Indigo - Roy RosenfelD Remixes
  type: MusicAlbum
  date published: 2010-11-08
album: The Kitchen
  type: MusicAlbum
  date published: 2011-05-23