Don Walker
type: MusicGroup
description: Don or Donald Walker may refer to: Don Walker (musician) (born 1951), Australian musician Don Walker (orchestrator) (1907–1989), American orchestrator Don Walker (diplomat), on List of ambassadors of
popularity: 24
followers: 481
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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additional property: OTSHash
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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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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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x285371921f4178e1bebf66fe4c1e41555eb6444306d6af3b4b7add9e8131b2ca. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/310fc688-a239-4fae-9754-686e84068943.json and https://artists.proofprofile.net/proofs/artist/310fc688-a239-4fae-9754-686e84068943.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T19:24:56Z
  text: {"copyright_id":"0x285371921f4178e1bebf66fe4c1e41555eb6444306d6af3b4b7add9e8131b2ca","name":"Don Walker","registered_at":"2026-06-11T15:32:43Z","symbol":"NIM0064515","token_address":"0x27b703443c7dd7ad21976773983e1ee6b80bcd6b","type":"artist","uuid":"310fc688-a239-4fae-9754-686e84068943"}
album: Cutting Back
  type: MusicAlbum
  date published: 2006-07-08
track: On The Town: 2. New York, New York - Live
  type: MusicRecording
  duration: PT4M0S
  duration ms: 240173
  explicit: false
  by artist: Don Walker
  by artist: Thomas Hampson
  by artist: Kurt Ollmann
  by artist: David Garrison
  by artist: London Symphony Orchestra
  by artist: Michael Tilson Thomas
  in album: Bernstein: On The Town
    type: MusicAlbum
    date published: 2013-01-01
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  additional property: OTSVerificationAPI
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    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF059230404
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-08T03:20:19Z
  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 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 0xd9f653e07d1ba8b26d79acebef87a72b5a9fe711209f544447af7fdd6e76ca55. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEF059230404.
    date published: 2026-07-08T03:20:19Z
  audio: On The Town: 2. New York, New York - Live
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    additional property: Danceability
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    additional property: Acousticness
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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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