Double Down
type: MusicGroup
genre: big band
genre: swing music
description: Double down is a betting technique in blackjack. Double Down or Doubling Down may refer to: Double Down: Game Change 2012, a 2013 book about the 2012 United States Presidential election Double Dow
popularity: 4
followers: 176
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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additional property: OTSBitcoinBlock
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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 0x79829f571bd9df85983ea2cec8ffcd404f3f079d8e60b4fd22fc48e338004535. Chain 2 (Bitcoin): anchored in block 954513 (2026-06-20T06:31:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9f95e162-66d0-4347-9ccd-87744f2e600b.json and https://artists.proofprofile.net/proofs/artist/9f95e162-66d0-4347-9ccd-87744f2e600b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T06:31:18Z
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album: Hit Me!
  type: MusicAlbum
  date published: 2005-01-01
album: All In
  type: MusicAlbum
  date published: 2007-01-01
album: Still Motion
  type: MusicAlbum
  date published: 2007-04-30
album: Polarity
  type: MusicAlbum
  date published: 2009-03-05
album: Make Your Move.
  type: MusicAlbum
  date published: 2014-07-13
  track: Maneater
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    duration ms: 215093
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    by artist: Double Down
    in album: Make Your Move.
      type: MusicAlbum
      date published: 2014-07-13
    genre: big band
    genre: swing music
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    additional property: OTSVerificationAPI
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    additional property: OTSTimestamp
      type: PropertyValue
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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 0x6063952acbf02931c18fbe7ce626ff329e9b2a8b396512cd84f8ba15f568f08b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QM93M1400019.
      date published: 2026-07-19T07:14:39Z
    audio: Maneater
      type: AudioObject
      additional property: Tempo (BPM)
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      additional property: Mode (Major/Minor)
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      additional property: Danceability
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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
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      additional property: Mode Name
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