Walter Pfeiffer
type: MusicGroup
description: Walter Pfeiffer (born in Beggingen in 1946) is a Swiss artist. Life and career Walter Pfeiffer was born in Beggingen (Switzerland), in 1946 and has been producing since the early 1970s. His portrait
popularity: 4
followers: 1
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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 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
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  date published: 2026-06-16T02:12:46Z
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track: Bach, JS: Concerto for Two Violins in D Minor, BWV 1043: I. Vivace
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  duration: PT4M16S
  duration ms: 256118
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  by artist: Johann Sebastian Bach
  by artist: Nikolaus Harnoncourt
  by artist: Alice Harnoncourt
  by artist: Walter Pfeiffer
  by artist: Concentus Musicus Wien
  in album: Wolfgang Amadeus Mozart & Co.
    type: MusicAlbum
    date published: 2025-04-15
  genre: classical
  genre: classical-piano
  genre: early-music
  genre: baroque
  genre: chamber-music
  genre: concerto
  isrc code: DEA806700101
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  additional property: OTSTimestamp
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  additional property: OTSVerifyInstructions
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    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 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
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    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe831875adf7b29424893de8304c889cdaff402bc19a5eee89ef3692170791d. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/DEA806700101.
    date published: 2026-07-30T19:11:09Z
  audio: Bach, JS: Concerto for Two Violins in D Minor, BWV 1043: I. Vivace
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    additional property: Key Name
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