Sam Francis
type: MusicGroup
description: Samuel Lewis Francis (June 25, 1923 – November 4, 1994) was an American painter and printmaker. Early life Sam Francis was born in San Mateo, California,Samuel L. Francis Foundation Foundation websit
popularity: 4
followers: 7
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x7973aa4ef47b6462345d2add710c6eed736848c5c4941700eb625df51e199cdf
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954342
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954342
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/8d89007b-7bbf-4ab0-ac20-f87d56e3fdd9.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/8d89007b-7bbf-4ab0-ac20-f87d56e3fdd9.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/8d89007b-7bbf-4ab0-ac20-f87d56e3fdd9
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-19T03:22:39Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x7973aa4ef47b6462345d2add710c6eed736848c5c4941700eb625df51e199cdf","name":"Sam Francis","registered_at":"2026-06-17T15:24:45Z","symbol":"NIM1437569","token_address":"0x1b3152fe952ea77c49b3e0d0a26c98fc5e1f4edc","type":"artist","uuid":"8d89007b-7bbf-4ab0-ac20-f87d56e3fdd9"}
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7973aa4ef47b6462345d2add710c6eed736848c5c4941700eb625df51e199cdf. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8d89007b-7bbf-4ab0-ac20-f87d56e3fdd9.json and https://artists.proofprofile.net/proofs/artist/8d89007b-7bbf-4ab0-ac20-f87d56e3fdd9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-19T03:22:39Z
  text: {"copyright_id":"0x7973aa4ef47b6462345d2add710c6eed736848c5c4941700eb625df51e199cdf","name":"Sam Francis","registered_at":"2026-06-17T15:24:45Z","symbol":"NIM1437569","token_address":"0x1b3152fe952ea77c49b3e0d0a26c98fc5e1f4edc","type":"artist","uuid":"8d89007b-7bbf-4ab0-ac20-f87d56e3fdd9"}
album: Pure Masonic Zeal!
  type: MusicAlbum
  date published: 2009-12-01