Quadra
type: MusicGroup
genre: psytrance
description: Quadra may refer to: Quadra, São Paulo, a municipality in Brazil Quadra Island, British Columbia, Canada Vancouver Quadra, a federal electoral district in British Columbia, Canada , a Royal Canad
popularity: 6
followers: 386
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x0dc92d68206b4e5987dd1b332071efedcbaf1a30e4c638985b39fc4b03c565c7
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954097
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954097
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/79b223c6-f3fe-45be-91c6-eb779d611122.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/79b223c6-f3fe-45be-91c6-eb779d611122.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/79b223c6-f3fe-45be-91c6-eb779d611122
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T13:13:51Z
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 0x0dc92d68206b4e5987dd1b332071efedcbaf1a30e4c638985b39fc4b03c565c7. Chain 2 (Bitcoin): anchored in block 954097 (2026-06-17T13:13:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/79b223c6-f3fe-45be-91c6-eb779d611122.json and https://artists.proofprofile.net/proofs/artist/79b223c6-f3fe-45be-91c6-eb779d611122.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T13:13:51Z
album: One Nation Under Trance
  type: MusicAlbum
  date published: 2006-05-05
album: One Nation Under Trance
  type: MusicAlbum
  date published: 2006-07-01
album: Voice of Reason
  type: MusicAlbum
  date published: 2008-06-04
album: Quadra Works
  type: MusicAlbum
  date published: 2012-11-30
album: Trance Science
  type: MusicAlbum
  date published: 2019-06-28
album: Natural mechanics
  type: MusicAlbum
  date published: 2025-06-23