Jay Leonhart
type: MusicGroup
genre: jazz
description: Jay Leonhart (born December 6, 1940) is an American double bassist, singer, and songwriter who has worked in jazz and popular music. He has performed with Judy Garland, Bucky Pizzarelli, Carly Simon,
popularity: 20
followers: 731
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSRecordURL
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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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 0x9c4bdf1a6a2bace2bdbc8f74e04119f564cc18f70a2e1ff1dcc97b426ffb543d. Chain 2 (Bitcoin): anchored in block 953687 (2026-06-14T20:19:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6a26ff14-6f0e-4326-bacd-6f709bb3be7e.json and https://artists.proofprofile.net/proofs/artist/6a26ff14-6f0e-4326-bacd-6f709bb3be7e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T20:19:15Z
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album: Salamander Pie
  type: MusicAlbum
  date published: 1983-06-01
album: There's Gonna Be Trouble
  type: MusicAlbum
  date published: 1984-01-01
album: There's Gonna Be Trouble
  type: MusicAlbum
  date published: 1984-01-01
album: The Double Cross
  type: MusicAlbum
  date published: 1988-01-01
album: Two Lane Highways
  type: MusicAlbum
  date published: 1992-01-01
album: Rodgers & Leonhart
  type: MusicAlbum
  date published: 2002-11-05
album: Cool
  type: MusicAlbum
  date published: 2004-11-16
album: Life Out On The Road
  type: MusicAlbum
  date published: 2005
album: Best of the Essential Years: Jay Leonhart
  type: MusicAlbum
  date published: 2012-06-08
album: Life Out On the Road
  type: MusicAlbum
  date published: 2015-09-01
album: The Bass Lesson
  type: MusicAlbum
  date published: 2015-11-06
album: Schadenfreude
  type: MusicAlbum
  date published: 2016-10-29
album: Don't You Wish (feat. Tomoko Ohno)
  type: MusicAlbum
  date published: 2017-11-06
album: Joy
  type: MusicAlbum
  date published: 2019-11-15
album: Joy
  type: MusicAlbum
  date published: 2019-11-15