MATT & SEM
type: MusicGroup
genre: schlager
genre: schlagerparty
popularity: 24
followers: 238
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x247b3c592841e6dec9ab310cf0859b23d4a231f80e0020ac702c792d40b2cf16
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953407
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953407
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/cce16dd5-ff52-4e06-836a-aec721561a45.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/cce16dd5-ff52-4e06-836a-aec721561a45.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/cce16dd5-ff52-4e06-836a-aec721561a45
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x247b3c592841e6dec9ab310cf0859b23d4a231f80e0020ac702c792d40b2cf16","name":"MATT & SEM","registered_at":"2026-06-12T09:58:19Z","symbol":"NIM0263103","token_address":"0x7125c7a645f35bcd56e9a85bd763a279562d6c12","type":"artist","uuid":"cce16dd5-ff52-4e06-836a-aec721561a45"}
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 0x247b3c592841e6dec9ab310cf0859b23d4a231f80e0020ac702c792d40b2cf16. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cce16dd5-ff52-4e06-836a-aec721561a45.json and https://artists.proofprofile.net/proofs/artist/cce16dd5-ff52-4e06-836a-aec721561a45.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T19:28:13Z
  text: {"copyright_id":"0x247b3c592841e6dec9ab310cf0859b23d4a231f80e0020ac702c792d40b2cf16","name":"MATT & SEM","registered_at":"2026-06-12T09:58:19Z","symbol":"NIM0263103","token_address":"0x7125c7a645f35bcd56e9a85bd763a279562d6c12","type":"artist","uuid":"cce16dd5-ff52-4e06-836a-aec721561a45"}
album: Deinetwegen
  type: MusicAlbum
  date published: 2025-06-20