Sandy Block
type: MusicGroup
genre: jazz blues
description: Sandy Block, also credited as Sid Block (January 16, 1917 – October 1985) was an American jazz bassist. Early life Block played violin as a child, and grew up in Cleveland and Brooklyn. He picked u
popularity: 17
followers: 41
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xe4ed2395e2c62bf5feda9e9a63d5afa67487428d27db470763450b6bd5bff981
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953625
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953625
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2328a51e-ba55-4383-accc-7ddc0d7162ab.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2328a51e-ba55-4383-accc-7ddc0d7162ab.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/2328a51e-ba55-4383-accc-7ddc0d7162ab
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T11:37:06Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xe4ed2395e2c62bf5feda9e9a63d5afa67487428d27db470763450b6bd5bff981","name":"Sandy Block","registered_at":"2026-06-14T08:06:36Z","symbol":"NIM0390571","token_address":"0x6f27dbb5d75cfd22e84f54fb85630c3e1b2812cc","type":"artist","uuid":"2328a51e-ba55-4383-accc-7ddc0d7162ab"}
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 0xe4ed2395e2c62bf5feda9e9a63d5afa67487428d27db470763450b6bd5bff981. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2328a51e-ba55-4383-accc-7ddc0d7162ab.json and https://artists.proofprofile.net/proofs/artist/2328a51e-ba55-4383-accc-7ddc0d7162ab.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T11:41:45Z
  text: {"copyright_id":"0xe4ed2395e2c62bf5feda9e9a63d5afa67487428d27db470763450b6bd5bff981","name":"Sandy Block","registered_at":"2026-06-14T08:06:36Z","symbol":"NIM0390571","token_address":"0x6f27dbb5d75cfd22e84f54fb85630c3e1b2812cc","type":"artist","uuid":"2328a51e-ba55-4383-accc-7ddc0d7162ab"}