Steven Kroll
type: MusicGroup
description: Steven Lawrence Kroll (August 11, 1941 – March 8, 2011) was an American children's book author. He wrote 96 books, including Is Milton Missing? (1975), The Biggest Pumpkin Ever (1984), Sweet America
popularity: 2
followers: 384
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additional property: CopyrightChainExplorerURL
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSRecordURL
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  value: https://artists.proofprofile.net/proofs/artist/f8e4b31c-0811-4d34-a41b-8a7038299da2.json
additional property: OTSVerificationAPI
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  value: 2026-06-21T18:08:38Z
additional property: OTSCanonicalRecord
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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 0xf807484b3d216a576647d153e981c92c2333cad1dfb9ff21fdbf116d75d0da10. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f8e4b31c-0811-4d34-a41b-8a7038299da2.json and https://artists.proofprofile.net/proofs/artist/f8e4b31c-0811-4d34-a41b-8a7038299da2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T18:08:38Z
  text: {"copyright_id":"0xf807484b3d216a576647d153e981c92c2333cad1dfb9ff21fdbf116d75d0da10","name":"Steven Kroll","registered_at":"2026-06-21T16:15:55Z","symbol":"NIM1971355","token_address":"0xe3d8ba12b297453112f0f13e0aa1bf8e1b0a340b","type":"artist","uuid":"f8e4b31c-0811-4d34-a41b-8a7038299da2"}
album: The Biggest Snowman Ever (Unabridged)
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  date published: 2005
  track: The Biggest Snowman Ever - Unabridged
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    duration ms: 452533
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    by artist: Steven Kroll
    in album: The Biggest Snowman Ever (Unabridged)
      type: MusicAlbum
      date published: 2005
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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
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x191403533ec1c0c5575ab4612623e7425b99407680dd7c14f030e4303c6f2582. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/DEUE22057342.
      date published: 2026-07-06T02:10:22Z
    audio: The Biggest Snowman Ever - Unabridged
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      additional property: Loudness (dB)
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