Cy Walter
type: MusicGroup
description: Cyril Frank Walter (September 16, 1915 – August 18, 1968) was an American café society pianist based in New York City for four decades. Dubbed the "Art Tatum of Park Avenue," he was praised for his ex
popularity: 4
followers: 88
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xeafe47cde665c13fd57476c05b87aec132589a1f74bacc74b9b7a5b0f092dbc2
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953997
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953997
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/269a8ecb-b087-46f4-860e-e0f796ae2e02.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/269a8ecb-b087-46f4-860e-e0f796ae2e02.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/269a8ecb-b087-46f4-860e-e0f796ae2e02
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T20:07:57Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xeafe47cde665c13fd57476c05b87aec132589a1f74bacc74b9b7a5b0f092dbc2","name":"Cy Walter","registered_at":"2026-06-16T02:54:57Z","symbol":"NIM0915157","token_address":"0x2aff1fade626138fdfca1bef2a1f7f0060999c31","type":"artist","uuid":"269a8ecb-b087-46f4-860e-e0f796ae2e02"}
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeafe47cde665c13fd57476c05b87aec132589a1f74bacc74b9b7a5b0f092dbc2. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/269a8ecb-b087-46f4-860e-e0f796ae2e02.json and https://artists.proofprofile.net/proofs/artist/269a8ecb-b087-46f4-860e-e0f796ae2e02.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T20:07:57Z
  text: {"copyright_id":"0xeafe47cde665c13fd57476c05b87aec132589a1f74bacc74b9b7a5b0f092dbc2","name":"Cy Walter","registered_at":"2026-06-16T02:54:57Z","symbol":"NIM0915157","token_address":"0x2aff1fade626138fdfca1bef2a1f7f0060999c31","type":"artist","uuid":"269a8ecb-b087-46f4-860e-e0f796ae2e02"}
album: Tea for Two (The Music of Vincent Youmans 1931 - 1951)
  type: MusicAlbum
  date published: 2015-01-01
album: How Deep Is the Ocean
  type: MusicAlbum
  date published: 2015-01-01
album: Rodgers Revisited
  type: MusicAlbum
  date published: 2009-01-01
album: Hits From The Great Astaire-Rogers Films
  type: MusicAlbum
  date published: 1960-01-22
album: Manhattan
  type: MusicAlbum
  date published: 1955-03-21
album: Holiday For Keys
  type: MusicAlbum
  date published: 1952-02-29
album: Piano Moods
  type: MusicAlbum
  date published: 1951
album: Maggy Fisher's Piano Playhouse
  type: MusicAlbum
  date published: 2024-11-15