Marchi
type: MusicGroup
description: Marchi is an Italian surname. According to one source, Marchi is a Spanish cognate of the English Mark, as derived from St. Mark the Evangelist. Notable people with this surname include: Alessandro
popularity: 3
followers: 84
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x82ed6b56f4e13f117d2f32312e497236b2f2a2833aa0f2f78b32064dd773adb9
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953954
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953954
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/251f376b-d8bc-4592-a4c0-81a14a04c82c.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/251f376b-d8bc-4592-a4c0-81a14a04c82c.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/251f376b-d8bc-4592-a4c0-81a14a04c82c
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T14:18:37Z
additional property: OTSCanonicalRecord
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 0x82ed6b56f4e13f117d2f32312e497236b2f2a2833aa0f2f78b32064dd773adb9. Chain 2 (Bitcoin): anchored in block 954014 (2026-06-16T22:46:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/251f376b-d8bc-4592-a4c0-81a14a04c82c.json and https://artists.proofprofile.net/proofs/artist/251f376b-d8bc-4592-a4c0-81a14a04c82c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T22:46:20Z
album: Let's march!
  type: MusicAlbum
  date published: 2019-08-14
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