EFX
type: MusicGroup
description: EFX may refer to: EFX (show), a Las Vegas show EFX (album), an album of the show Enerflex Systems, a Canadian company listed as EFX on the Toronto Stock Exchange Equifax, a U.S. consumer credit re
popularity: 14
followers: 176
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x19d61a322a14ec648b1fcdaba75c04835a5c698c615c2fd725c9efa8be43822b
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953778
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953778
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/aa6419b8-f610-49e9-9d5a-70993a40c24b.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/aa6419b8-f610-49e9-9d5a-70993a40c24b.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/aa6419b8-f610-49e9-9d5a-70993a40c24b
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T11:57:35Z
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 0x19d61a322a14ec648b1fcdaba75c04835a5c698c615c2fd725c9efa8be43822b. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aa6419b8-f610-49e9-9d5a-70993a40c24b.json and https://artists.proofprofile.net/proofs/artist/aa6419b8-f610-49e9-9d5a-70993a40c24b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T11:57:35Z
album: 200 Sound Effects (The Ultimate Library: Sounds & Jingle)
  type: MusicAlbum
  date published: 2012-09-09
album: Sound Effects, Vol. 4 (Heartbeat, Seagulls, Telephone, Hammer, Insects and More...)
  type: MusicAlbum
  date published: 2013-01-01
album: Sound Effects, Vol. 1 (Water, Police, Radio, Tennis, Motor Bike and More)
  type: MusicAlbum
  date published: 2013-01-01
album: EFX - Sound Effects, Vol. 3 (Footsteps, Sneeze, Laugh, Birds, Screams and More)
  type: MusicAlbum
  date published: 2013-09-18
album: Sound Effects, Vol. 2 (Applause, Cartoons, Cry, Boing!)
  type: MusicAlbum
  date published: 2013-09-18
album: Jericho Riddim
  type: MusicAlbum
  date published: 2016-10-20
album: Zulu EP
  type: MusicAlbum
  date published: 2016-10-24
album: Zulu Remixes
  type: MusicAlbum
  date published: 2017-03-13
album: Drum & Bass in Roots & Culture
  type: MusicAlbum
  date published: 2020-08-14