Maciej Fortuna
type: MusicGroup
genre: avant-garde
genre: chamber music
description: Maciej Fortuna is a Polish jazz trumpet player, composer and musical educator. He runs the Fortuna Music record label. Jerzy Milian dedicated his composition "Music For Mr. Fortuna" to Maciej Fortuna.
popularity: 2
followers: 257
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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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
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646d238650c2370097b9e81183be12094eb09a5cc1baeab91bb75cc611a50296. Chain 2 (Bitcoin): anchored in block 954014 (2026-06-16T22:46:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/31ff0658-bbee-4117-98aa-a1000d12fe58.json and https://artists.proofprofile.net/proofs/artist/31ff0658-bbee-4117-98aa-a1000d12fe58.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T22:46:20Z
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album: Tropy
  type: MusicAlbum
  date published: 2013-11-08
album: Maciejewski Variations
  type: MusicAlbum
  date published: 2015-06-02