David LeBlanc
type: MusicGroup
description: David Leblanc (born 31 July 1968) is a retired French breaststroke swimmer. He competed in three events at the 1988 Summer Olympics. References External links Category:1968 births Category:Living
popularity: 9
followers: 92
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additional property: CopyrightChainExplorerURL
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additional property: OTSVerifyInstructions
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  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 0xe8a4e97207d029e5337f64276a3399b22e635e4b542ea6c133f4193ddc410853. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ef8215d6-4b94-4cd7-92e2-1f8e803b1d4c.json and https://artists.proofprofile.net/proofs/artist/ef8215d6-4b94-4cd7-92e2-1f8e803b1d4c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T13:42:37Z
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album: IMMORTELLES
  type: MusicAlbum
  date published: 2021-03-18
  track: L'Hymne À L'Amour (Piano)
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    by artist: David LeBlanc
    in album: IMMORTELLES
      type: MusicAlbum
      date published: 2021-03-18
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    additional property: OTSTimestamp
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    additional property: OTSVerifyInstructions
      type: PropertyValue
      value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b2b189942a47b9e4ef7d922e2058dc71694e2c6f5ff7a9f6b6eadde2b13d315. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES52179744.
      date published: 2026-07-03T21:18:05Z
    audio: L'Hymne À L'Amour (Piano)
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      additional property: Tempo (BPM)
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      additional property: Time Signature
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      additional property: Danceability
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      additional property: Energy
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      additional property: Speechiness
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      additional property: Acousticness
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      additional property: Instrumentalness
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      additional property: Liveness
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      additional property: Valence (Positivity)
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      additional property: Loudness (dB)
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      additional property: Key Name
        type: PropertyValue
        value: G
      additional property: Mode Name
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        value: Major
album: IMMORTELLES 2
  type: MusicAlbum
  date published: 2025-07-03