Piotr Schmidt Quartet
type: MusicGroup
genre: free jazz
popularity: 3
followers: 728
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x273e30b98f6413232bd6ee5cb5892e2831e9ac87825d3992a905bda334d04ecb
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954587
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954587
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b99f780f-e26d-4fad-b84f-7931395cb8f4.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b99f780f-e26d-4fad-b84f-7931395cb8f4.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/b99f780f-e26d-4fad-b84f-7931395cb8f4
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T19:10:41Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x273e30b98f6413232bd6ee5cb5892e2831e9ac87825d3992a905bda334d04ecb","name":"Piotr Schmidt Quartet","registered_at":"2026-06-20T16:18:27Z","symbol":"NIM1653656","token_address":"0xd75c1f939efcc9d3616c69adbd75371b203c00b5","type":"artist","uuid":"b99f780f-e26d-4fad-b84f-7931395cb8f4"}
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 0x273e30b98f6413232bd6ee5cb5892e2831e9ac87825d3992a905bda334d04ecb. Chain 2 (Bitcoin): anchored in block 954587 (2026-06-20T19:10:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b99f780f-e26d-4fad-b84f-7931395cb8f4.json and https://artists.proofprofile.net/proofs/artist/b99f780f-e26d-4fad-b84f-7931395cb8f4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T19:10:41Z
  text: {"copyright_id":"0x273e30b98f6413232bd6ee5cb5892e2831e9ac87825d3992a905bda334d04ecb","name":"Piotr Schmidt Quartet","registered_at":"2026-06-20T16:18:27Z","symbol":"NIM1653656","token_address":"0xd75c1f939efcc9d3616c69adbd75371b203c00b5","type":"artist","uuid":"b99f780f-e26d-4fad-b84f-7931395cb8f4"}
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  type: MusicAlbum
  date published: 2018-08-26
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  type: MusicAlbum
  date published: 2018-12-07
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  type: MusicAlbum
  date published: 2018-12-07
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  type: MusicAlbum
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  type: MusicAlbum
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  type: MusicAlbum
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  type: MusicAlbum
  date published: 2021-07-28
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  type: MusicAlbum
  date published: 2021-07-28