Kalin Twins
type: MusicGroup
genre: doo-wop
description: The Kalin Twins (born February 16, 1934), also known as Hal and Herbie, were an American pop singing, songwriting and recording duo, formed in 1958 by twin brothers Harold Kalin and Herbert Kalin. The
popularity: 27
followers: 5333
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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: 2026-06-12T19:24:56Z
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album: Forget Me Not (Mono Version)
  type: MusicAlbum
  date published: 1958-01-01
album: When (Mono Version)
  type: MusicAlbum
  date published: 1958-01-01
album: The Kalin Twins
  type: MusicAlbum
  date published: 1958-05-26
  track: Three O' Clock Thrill
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      date published: 1958-05-26
    genre: doo-wop
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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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      date published: 2026-07-15T17:59:52Z
    audio: Three O' Clock Thrill
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  track: Sweet Sugar Lips
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    subject of: OpenTimestamps Proof of Existence
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      date published: 2026-07-18T22:59:44Z
    audio: Sweet Sugar Lips
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album: Clickety Clack (Mono Version)
album: The Kalin Twins Again (Mono Version)
album: When
album: Forever Kalin Twins
album: The Remarkable Kalin Twins
album: Just Kalin Twins
album: The Classic Decades Presents - Kalin Twins
album: The Genius of Kalin Twins
album: When (1958 Original Vintage Record)
album: Truly Kalin Twins
album: The Sensational Kalin Twins
album: Doublettes
album: The Outstanding Kalin Twins
album: Monumental - Classic Artists - The Kalin Twins
album: I Will Always Love Kalin Twins
album: The Just Kalin Twins
album: 13 Dynamic Duets!
album: Kalin Twins: When……..18 Dynamic Duets!
album: The Best Of
album: Three O'clock Thrill
album: Greatest Hits
album: When... 18 Dynamic Duets!
album: Oh! My Godness - Rockin' with the Kalin Twins
album: Golden Selection (Remastered)
album: One More Time
album: Echoes of Summer - Kalin Twins' Harmonic Rhythms (Remastered)
album: Essential Classics, Vol. 302: Kalin Twins
track: Medley - Live
track: When - Live

Instrumentalness
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value: 0

Liveness
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value: 0.086

Valence (Positivity)
type: PropertyValue
value: 0.935

Loudness (dB)
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value: -11.027

Key Name
type: PropertyValue
value: G

Mode Name
type: PropertyValue
value: Major

Clickety Clack (Mono Version)
type: MusicAlbum
date published: 1959-01-01

The Kalin Twins Again (Mono Version)
type: MusicAlbum
date published: 1961-01-01

When
type: MusicAlbum
date published: 2001-09-20

When
type: MusicAlbum
date published: 2011-03-01

Forever Kalin Twins
type: MusicAlbum
date published: 2013

The Remarkable Kalin Twins
type: MusicAlbum
date published: 2013

Just Kalin Twins
type: MusicAlbum
date published: 2013

The Classic Decades Presents - Kalin Twins
type: MusicAlbum
date published: 2013-04-10

The Genius of Kalin Twins
type: MusicAlbum
date published: 2013-07-19

When (1958 Original Vintage Record)
type: MusicAlbum
date published: 2013-08-01

Truly Kalin Twins
type: MusicAlbum
date published: 2013-09-09

The Sensational Kalin Twins
type: MusicAlbum
date published: 2013-09-23

Doublettes
type: MusicAlbum
date published: 2013-09-30

The Outstanding Kalin Twins
type: MusicAlbum
date published: 2013-10-31

Monumental - Classic Artists - The Kalin Twins
type: MusicAlbum
date published: 2013-12-23

When
type: MusicAlbum
date published: 2014-04-25

I Will Always Love Kalin Twins
type: MusicAlbum
date published: 2014-06-27

The Just Kalin Twins
type: MusicAlbum
date published: 2014-07-17

13 Dynamic Duets!
type: MusicAlbum
date published: 2014-10-01

Kalin Twins: When……..18 Dynamic Duets!
type: MusicAlbum
date published: 2014-11-12

The Best Of
type: MusicAlbum
date published: 2015-01-16

Three O'clock Thrill
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date published: 2015-05-11

Greatest Hits
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date published: 2015-07-22
track: When
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    date published: 2015-07-22
  genre: doo-wop
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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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    date published: 2026-07-17T11:34:58Z
  audio: When
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When... 18 Dynamic Duets!
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date published: 2019-07-24
track: When
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    date published: 2019-07-24
  genre: doo-wop
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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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    date published: 2026-07-02T16:51:38Z
  audio: When
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Oh! My Godness - Rockin' with the Kalin Twins
type: MusicAlbum
date published: 2020-09-07

Golden Selection (Remastered)
type: MusicAlbum
date published: 2020-10-09

One More Time
type: MusicAlbum
date published: 2021-03-19

When
type: MusicAlbum
date published: 2023-05-08

Echoes of Summer - Kalin Twins' Harmonic Rhythms (Remastered)
type: MusicAlbum
date published: 2023-08-25

Essential Classics, Vol. 302: Kalin Twins
type: MusicAlbum
date published: 2024-06-19

Essential Classics, Vol. 302: Kalin Twins
type: MusicAlbum
date published: 2024-12-18

Medley - Live
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duration: PT8M49S
duration ms: 529533
explicit: false
by artist: Cliff Richard
by artist: Kalin Twins
by artist: The Dallas Boys
by artist: The Vernons Girls
by artist: Oh Boy! Band
in album: From a Distance - The Event
  type: MusicAlbum
  date published: 1990
genre: adult-standards
genre: rock-and-roll
isrc code: GBAYE9000445
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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. 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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  date published: 2026-07-07T14:50:41Z
audio: Medley - Live
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    value: -13.53
  additional property: Key Name
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    value: G
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When - Live
type: MusicRecording
duration: PT2M24S
duration ms: 144573
explicit: false
by artist: Kalin Twins
by artist: Oh Boy! Band
in album: From a Distance - The Event
  type: MusicAlbum
  date published: 1990
isrc code: GBAYE9000453
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYE9000453
additional property: OTSTimestamp
  type: PropertyValue
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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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984c9345ba4ad0aef5e60eab629d5757105cd44afeeb8f34b5233ca3ca8aa1ae. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBAYE9000453.
  date published: 2026-07-02T03:55:08Z
audio: When - Live
  type: AudioObject
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  additional property: Danceability
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  additional property: Energy
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  additional property: Speechiness
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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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    value: -16.319
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