Marian Petrescu
type: MusicGroup
description: thumb|Marian Petrescu at Cosmopolite (2018) Marian Petrescu (born 1970, Bucharest, Romania) is a Romanian jazz pianist. Playing since the age of 4, he has been on the jazz scene since the age of 15 af
popularity: 10
followers: 861
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x0c808e4e496f37f318c9aa8d2df9a8982e3953955fc60a6fc9b4dc25adf9ba77
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954066
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954066
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/74367e84-3345-4759-8ddc-95e831e06afc.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/74367e84-3345-4759-8ddc-95e831e06afc.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/74367e84-3345-4759-8ddc-95e831e06afc
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:11:48Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x0c808e4e496f37f318c9aa8d2df9a8982e3953955fc60a6fc9b4dc25adf9ba77","name":"Marian Petrescu","registered_at":"2026-06-17T06:05:18Z","symbol":"NIM1304243","token_address":"0xfe89d4c871f7e2a62bd50dcd102f751826123fc6","type":"artist","uuid":"74367e84-3345-4759-8ddc-95e831e06afc"}
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 0x0c808e4e496f37f318c9aa8d2df9a8982e3953955fc60a6fc9b4dc25adf9ba77. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/74367e84-3345-4759-8ddc-95e831e06afc.json and https://artists.proofprofile.net/proofs/artist/74367e84-3345-4759-8ddc-95e831e06afc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0x0c808e4e496f37f318c9aa8d2df9a8982e3953955fc60a6fc9b4dc25adf9ba77","name":"Marian Petrescu","registered_at":"2026-06-17T06:05:18Z","symbol":"NIM1304243","token_address":"0xfe89d4c871f7e2a62bd50dcd102f751826123fc6","type":"artist","uuid":"74367e84-3345-4759-8ddc-95e831e06afc"}
album: Pianist
  type: MusicAlbum
  date published: 1986
album: Body and Soul
  type: MusicAlbum
  date published: 2006-07-30
album: Thrivin' (Live at Jazz Standard)
  type: MusicAlbum
  date published: 2010-05-11
album: Live At Jazzhus Montmartre, Kopenhagen
  type: MusicAlbum
  date published: 2022-06-03