The Secret French Postcards
type: MusicGroup
genre: cold wave
genre: darkwave
genre: deathrock
genre: post-punk
popularity: 9
followers: 2627
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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additional property: OTSVerificationAPI
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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 0x2534dcfe0d5f3995874f02b8d9286f67e0ed7a25b6d3187206965c0063e88d27. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d7ae0271-0bee-49a6-b87a-9c2635dea0e4.json and https://artists.proofprofile.net/proofs/artist/d7ae0271-0bee-49a6-b87a-9c2635dea0e4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T07:29:20Z
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album: The Toy
  type: MusicAlbum
  date published: 2017
album: Fingers
  type: MusicAlbum
  date published: 2017
album: Shadow
  type: MusicAlbum
  date published: 2018
album: Blown to Bits
  type: MusicAlbum
  date published: 2018
album: LES ÉDITIONS OSTRA
  type: MusicAlbum
  date published: 2018-04-25
album: Awake EP
  type: MusicAlbum
  date published: 2019-01-31
album: Contradictions
  type: MusicAlbum
  date published: 2019-03-01
album: Out of You
  type: MusicAlbum
  date published: 2020-04-10
  track: Out of You
    type: MusicRecording
    duration: PT4M4S
    duration ms: 244000
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    by artist: The Secret French Postcards
    in album: Out of You
      type: MusicAlbum
      date published: 2020-04-10
    genre: cold wave
    genre: darkwave
    genre: deathrock
    genre: post-punk
    isrc code: USDY42039842
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    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-18T12:14:37Z
    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
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      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5050be40dff59ceaa20071589438f681005bdbf455e7b7b752e52e8eb6605cc. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USDY42039842.
      date published: 2026-07-18T12:14:37Z
    audio: Out of You
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 120.025
      additional property: Musical Key
        type: PropertyValue
        value: 0
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 3
      additional property: Danceability
        type: PropertyValue
        value: 0.518
      additional property: Energy
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        value: 0.888
      additional property: Speechiness
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      additional property: Acousticness
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      additional property: Instrumentalness
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        value: 0.689
      additional property: Liveness
        type: PropertyValue
        value: 0.318
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.431
      additional property: Loudness (dB)
        type: PropertyValue
        value: -2.744
      additional property: Key Name
        type: PropertyValue
        value: C
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: Colours
  type: MusicAlbum
  date published: 2020-12-11
album: Colours (Ultra Sunn Remix)
  type: MusicAlbum
  date published: 2021-07-06
  track: Colours (Ultra Sunn Remix)
    type: MusicRecording
    duration: PT5M7S
    duration ms: 307500
    explicit: false
    by artist: The Secret French Postcards
    in album: Colours (Ultra Sunn Remix)
      type: MusicAlbum
      date published: 2021-07-06
    genre: cold wave
    genre: darkwave
    genre: deathrock
    genre: post-punk
    isrc code: QMBZ92199171
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    additional property: OTSTimestamp
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      value: 2026-07-21T12:57:00Z
    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 0xd5e2c3081ea97530728a9234268e04665544a80d4f660ae4cf63b260a3c852d0. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:57:00Z), 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/QMBZ92199171.
      date published: 2026-07-21T12:57:00Z
    audio: Colours (Ultra Sunn Remix)
album: Dreaming at Last
album: Sides
album: Life Got Claws

Colours (Ultra Sunn Remix)
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additional property: Tempo (BPM)
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  value: 128.04
additional property: Musical Key
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additional property: Mode (Major/Minor)
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additional property: Time Signature
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additional property: Danceability
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  value: 0.578
additional property: Energy
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additional property: Speechiness
  type: PropertyValue
  value: 0.052
additional property: Acousticness
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additional property: Instrumentalness
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additional property: Liveness
  type: PropertyValue
  value: 0.093
additional property: Valence (Positivity)
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additional property: Loudness (dB)
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additional property: Mode Name
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Dreaming at Last
type: MusicAlbum
date published: 2022-07-08

Sides
type: MusicAlbum
date published: 2022-09-02

Life Got Claws
type: MusicAlbum
date published: 2022-11-11