Michel Portal
type: MusicGroup
genre: avant-garde
description: Michel Portal (27 November 1935 – 12 February 2026) was a French composer, saxophonist and clarinetist. He played both jazz and classical music and is considered to be "one of the architects of modern
popularity: 2
followers: 40
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xfe9483ec35edebe51ecdfe2a03156c220878998865e9ca4a697e199f00d5bc76
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954342
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954342
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/91cb8b35-6937-4bec-ab0b-5d464a8e3967.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/91cb8b35-6937-4bec-ab0b-5d464a8e3967.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/91cb8b35-6937-4bec-ab0b-5d464a8e3967
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-19T03:22:39Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xfe9483ec35edebe51ecdfe2a03156c220878998865e9ca4a697e199f00d5bc76","name":"Michel Portal","registered_at":"2026-06-17T16:33:36Z","symbol":"NIM1454023","token_address":"0xfce0e89e89126d6cc2f4dfd8b45f37b935db6b75","type":"artist","uuid":"91cb8b35-6937-4bec-ab0b-5d464a8e3967"}
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 0xfe9483ec35edebe51ecdfe2a03156c220878998865e9ca4a697e199f00d5bc76. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/91cb8b35-6937-4bec-ab0b-5d464a8e3967.json and https://artists.proofprofile.net/proofs/artist/91cb8b35-6937-4bec-ab0b-5d464a8e3967.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-19T03:22:39Z
  text: {"copyright_id":"0xfe9483ec35edebe51ecdfe2a03156c220878998865e9ca4a697e199f00d5bc76","name":"Michel Portal","registered_at":"2026-06-17T16:33:36Z","symbol":"NIM1454023","token_address":"0xfce0e89e89126d6cc2f4dfd8b45f37b935db6b75","type":"artist","uuid":"91cb8b35-6937-4bec-ab0b-5d464a8e3967"}
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