Stef
type: MusicGroup
description: STEF (formerly STEF-TFE) is a European specialist in cold logistics for temperature-sensitive and agro-food products. STEF is active in 7 European countries: Belgium, Spain, France, Italy, the Nethe
popularity: 2
followers: 28
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x6062d29b3d02c8861d49bac78745e539379c5a2f1adcb55d0852df8d147d302f
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954346
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954346
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/991b4939-351d-4f53-bcdd-82e7139bf49c.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/991b4939-351d-4f53-bcdd-82e7139bf49c.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/991b4939-351d-4f53-bcdd-82e7139bf49c
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-19T03:51:26Z
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 0x6062d29b3d02c8861d49bac78745e539379c5a2f1adcb55d0852df8d147d302f. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/991b4939-351d-4f53-bcdd-82e7139bf49c.json and https://artists.proofprofile.net/proofs/artist/991b4939-351d-4f53-bcdd-82e7139bf49c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-19T03:51:26Z
album: Taksidia
  type: MusicAlbum
  date published: 2023-12-22
album: Nea Arxi
  type: MusicAlbum
  date published: 2024-01-18
album: -224-
  type: MusicAlbum
  date published: 2025-01-03
album: Anapolo
  type: MusicAlbum
  date published: 2025-02-04