A Feast For Crows
type: MusicGroup
genre: deathcore
genre: melodic death metal
genre: metalcore
description: A Feast for Crows is the fourth of seven planned novels in the epic fantasy series A Song of Ice and Fire by American author George R. R. Martin. The novel was first published in the United Kingdom o
popularity: 4
followers: 742
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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  value: https://explorer.copyrightchains.com/tx/0x407a7a1fb413345dd7706f63849ed8e17d38f584ee497e8fe34b0c772fdf8195
additional property: OTSHash
additional property: OTSBitcoinBlock
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  value: 954058
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954058
additional property: OTSProofURL
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  value: https://artists.proofprofile.net/proofs/artist/43c612fb-8549-4adc-a3d2-2f27657e2dae.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/43c612fb-8549-4adc-a3d2-2f27657e2dae.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/43c612fb-8549-4adc-a3d2-2f27657e2dae
additional property: OTSTimestamp
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  value: 2026-06-17T06:34:31Z
additional property: OTSCanonicalRecord
  type: PropertyValue
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additional property: OTSVerifyInstructions
  type: PropertyValue
  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
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x407a7a1fb413345dd7706f63849ed8e17d38f584ee497e8fe34b0c772fdf8195. Chain 2 (Bitcoin): anchored in block 954058 (2026-06-17T06:34:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/43c612fb-8549-4adc-a3d2-2f27657e2dae.json and https://artists.proofprofile.net/proofs/artist/43c612fb-8549-4adc-a3d2-2f27657e2dae.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T06:34:31Z
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album: Let the Feast Begin
  type: MusicAlbum
  date published: 2018-05-11
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  type: MusicAlbum
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