Michael Madsen
type: MusicGroup
description: Michael Søren Madsen (September 25, 1957 – July 3, 2025) was an American actor. He was widely known for starring in Quentin Tarantino's films such as Reservoir Dogs (1992), Kill Bill: Volume 2 (2004),
popularity: 4
followers: 6
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x5b0c6eb0a913e00316b3e2d6714f5e4f6370f103c68f786db7c91dcd8ca5a8f4
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954728
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954728
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/fbd9fba3-e0e6-487e-be6e-5d60b2b33590.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/fbd9fba3-e0e6-487e-be6e-5d60b2b33590.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/fbd9fba3-e0e6-487e-be6e-5d60b2b33590
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T18:08:38Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x5b0c6eb0a913e00316b3e2d6714f5e4f6370f103c68f786db7c91dcd8ca5a8f4","name":"Michael Madsen","registered_at":"2026-06-21T17:03:41Z","symbol":"NIM1981835","token_address":"0x3d3e69c68720039c02a34f032f9359600f3b59bd","type":"artist","uuid":"fbd9fba3-e0e6-487e-be6e-5d60b2b33590"}
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
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b0c6eb0a913e00316b3e2d6714f5e4f6370f103c68f786db7c91dcd8ca5a8f4. 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/fbd9fba3-e0e6-487e-be6e-5d60b2b33590.json and https://artists.proofprofile.net/proofs/artist/fbd9fba3-e0e6-487e-be6e-5d60b2b33590.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T18:08:38Z
  text: {"copyright_id":"0x5b0c6eb0a913e00316b3e2d6714f5e4f6370f103c68f786db7c91dcd8ca5a8f4","name":"Michael Madsen","registered_at":"2026-06-21T17:03:41Z","symbol":"NIM1981835","token_address":"0x3d3e69c68720039c02a34f032f9359600f3b59bd","type":"artist","uuid":"fbd9fba3-e0e6-487e-be6e-5d60b2b33590"}