Martha Cheney
type: MusicGroup
genre: children's music
description: Martha Cheney (born 1953) is the author of several titles in the Gifted & Talented book series, which sold more than one million copies. She currently resides in Huson, Montana. She was also a contri
popularity: 16
followers: 64
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xb25004b14e667792e475dfba11b39a9025d8474df984d5d93b2eccb47447759d
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/a4bf495c-7373-40da-a097-eac098af8316.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a4bf495c-7373-40da-a097-eac098af8316.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/a4bf495c-7373-40da-a097-eac098af8316
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T05:25:34Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xb25004b14e667792e475dfba11b39a9025d8474df984d5d93b2eccb47447759d","name":"Martha Cheney","registered_at":"2026-06-14T21:53:50Z","symbol":"NIM0587856","token_address":"0xb697b37b9ef866dfd5242a3229ce2398c7645ade","type":"artist","uuid":"a4bf495c-7373-40da-a097-eac098af8316"}
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 0xb25004b14e667792e475dfba11b39a9025d8474df984d5d93b2eccb47447759d. 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/a4bf495c-7373-40da-a097-eac098af8316.json and https://artists.proofprofile.net/proofs/artist/a4bf495c-7373-40da-a097-eac098af8316.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-15T05:25:34Z
  text: {"copyright_id":"0xb25004b14e667792e475dfba11b39a9025d8474df984d5d93b2eccb47447759d","name":"Martha Cheney","registered_at":"2026-06-14T21:53:50Z","symbol":"NIM0587856","token_address":"0xb697b37b9ef866dfd5242a3229ce2398c7645ade","type":"artist","uuid":"a4bf495c-7373-40da-a097-eac098af8316"}