Florence Rose
type: MusicGroup
description: Florence Rose (June 20, 1903 – April 26, 1969) was an American birth control activist, perhaps best known for serving as the secretary of Margaret Sanger for more than a decade. Early life and educat
popularity: 11
followers: 2270
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x4540c4b6c18f9aa13da362060b3fa4c66c175fe3e4bb58326921339aa35fdadc
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953746
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953746
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a52f3a3b-9885-4f87-a672-2f4d6136a22f.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a52f3a3b-9885-4f87-a672-2f4d6136a22f.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/a52f3a3b-9885-4f87-a672-2f4d6136a22f
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T05:25:34Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x4540c4b6c18f9aa13da362060b3fa4c66c175fe3e4bb58326921339aa35fdadc","name":"Florence Rose","registered_at":"2026-06-14T21:50:02Z","symbol":"NIM0586945","token_address":"0xfad9d227d60b82e8e7150fe87ac8f472901fed43","type":"artist","uuid":"a52f3a3b-9885-4f87-a672-2f4d6136a22f"}
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
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  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4540c4b6c18f9aa13da362060b3fa4c66c175fe3e4bb58326921339aa35fdadc. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a52f3a3b-9885-4f87-a672-2f4d6136a22f.json and https://artists.proofprofile.net/proofs/artist/a52f3a3b-9885-4f87-a672-2f4d6136a22f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T05:25:34Z
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