Mark Shearer
type: MusicGroup
description: Mark S. Shearer (born August 11, 1952) is an American politician who served as a member of both chambers of the Iowa General Assembly Early life and education Born in Burlington, Iowa, Shearer was
popularity: 9
followers: 110
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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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  date published: 2026-06-16T13:28:01Z
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album: Through the Window
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  date published: 2010-05-15
album: Upon Reflection (Remastered)
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  date published: 2019-03-01
  track: Looking Back
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    by artist: Mark Shearer
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      date published: 2019-03-01
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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
    subject of: OpenTimestamps Proof of Existence
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      date published: 2026-07-05T10:59:37Z
    audio: Looking Back
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  track: Good Cup O'Joe
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    by artist: Mark Shearer
    in album: Upon Reflection (Remastered)
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      date published: 2019-03-01
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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
    subject of: OpenTimestamps Proof of Existence
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      date published: 2026-07-05T18:48:28Z
    audio: Good Cup O'Joe
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album: God Rest Ye Merry Bells
album: Silent Night Holy Night

Valence (Positivity)
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value: 0.195

Loudness (dB)
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value: -15.092

Key Name
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value: G

Mode Name
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value: Minor

God Rest Ye Merry Bells
type: MusicAlbum
date published: 2024-11-17

Silent Night Holy Night
type: MusicAlbum
date published: 2025-11-01