Mastemey
type: MusicGroup
popularity: 2
followers: 139
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x16ac15d6a7885b3acf5c5fd815bf5d3606d23a78d43530516b9b99d1235ad9f1
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954728
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954728
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f8e7b7ef-7d4c-4fb1-a05a-de0ba9afdb0d.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f8e7b7ef-7d4c-4fb1-a05a-de0ba9afdb0d.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/f8e7b7ef-7d4c-4fb1-a05a-de0ba9afdb0d
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T18:08:38Z
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 0x16ac15d6a7885b3acf5c5fd815bf5d3606d23a78d43530516b9b99d1235ad9f1. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f8e7b7ef-7d4c-4fb1-a05a-de0ba9afdb0d.json and https://artists.proofprofile.net/proofs/artist/f8e7b7ef-7d4c-4fb1-a05a-de0ba9afdb0d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T18:08:38Z
album: Vol. I
  type: MusicAlbum
  date published: 2017-09-13
album: Wątła wola
  type: MusicAlbum
  date published: 2019-01-29
album: Nasz upadły
  type: MusicAlbum
  date published: 2019-03-01
album: Osoba Pogardy
  type: MusicAlbum
  date published: 2019-03-01
album: Podróż jedenasta
  type: MusicAlbum
  date published: 2019-03-16
album: Down in the dark
  type: MusicAlbum
  date published: 2021-04-07
album: Obraz Pozorny
  type: MusicAlbum
  date published: 2021-05-28
album: Live at Forum Hall
  type: MusicAlbum
  date published: 2021-08-05