Donald Swann
type: MusicGroup
genre: comedy
description: Donald Ibrahim Swann (30 September 1923 – 23 March 1994) was a British composer, musician, singer and entertainer. He was one half of Flanders and Swann, writing and performing comic songs with Michae
popularity: 5
followers: 297
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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 0xf920047997292976661bd9063f36db9bd03ef088c382fc6546fa3fe620df7a64. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/63e8a1f3-3504-482a-b5cb-3f9a4cf44d13.json and https://artists.proofprofile.net/proofs/artist/63e8a1f3-3504-482a-b5cb-3f9a4cf44d13.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
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album: At The Drop Of Another Hat
  type: MusicAlbum
  date published: 2000-01-01
album: The Isles of Greece
  type: MusicAlbum
  date published: 2013-04-01
album: Donald Swann: Songs
  type: MusicAlbum
  date published: 2017-06-30
track: The Hippopotamus Song
track: Slow Train - Arr. Gordon Langford
track: Greensleeves

The Hippopotamus Song
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duration: PT3M39S
duration ms: 219773
explicit: false
by artist: Michael Flanders
by artist: Donald Swann
by artist: Bryn Terfel
by artist: Czech Philharmonic
by artist: Paul Bateman
in album: Dreams and Songs
  type: MusicAlbum
  date published: 2018-10-19
isrc code: DEN961800850
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additional property: OTSTimestamp
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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
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-02T05:09:12Z
audio: The Hippopotamus Song
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  additional property: Time Signature
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  additional property: Danceability
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  additional property: Energy
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  additional property: Acousticness
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  additional property: Instrumentalness
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
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  additional property: Mode Name
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Slow Train - Arr. Gordon Langford
type: MusicRecording
duration: PT3M37S
duration ms: 217146
explicit: false
by artist: Donald Swann
by artist: Gordon Langford
by artist: The King's Singers
in album: The Library Vol. 2
  type: MusicAlbum
  date published: 2020-10-02
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T02:19:15Z
audio: Slow Train - Arr. Gordon Langford
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    value: A
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    type: PropertyValue
    value: Major
isrc code: GBLLH2063505
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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 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

Greensleeves
type: MusicRecording
duration: PT3M6S
duration ms: 186070
explicit: false
by artist: Jazzband Jukebox
by artist: Donald Swann
in album: Dinner Music
  type: MusicAlbum
  date published: 2016-10-05
subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d009268290650d13854bb108ae071564cc9cf744b741b422b95064ee88fd17c. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBLFP1634807.
  date published: 2026-07-30T17:23:26Z
audio: Greensleeves
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  additional property: Danceability
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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 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