Ioannis or Ioannes (), shortened to Giannis or Yannis (Γιάννης) is a Greek given name cognate with Johannes and John, ultimately from Hebrew Yohanan. Notable people with the name include: Ioannis I, T
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacab026cc68d20ad4fcb3af77d4c3b16fcdf214321c720ec625012ad01b8a1dc. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a98d3dbb-77d2-45e9-933c-aae45082aab4.json and https://artists.proofprofile.net/proofs/artist/a98d3dbb-77d2-45e9-933c-aae45082aab4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).