Vlassis Bonatsos () (30 November 1949 – 14 October 2004) was a popular Greek entertainer and singer. Biography His father was a judicial officer and his mother was a piano teacher. Vlassis started
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 0x8a6f2e987004ee6f25e45799efa7e3239a2ce7cb471b8ec934f8f572524f1f15. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dd19d02d-1c05-4f31-b158-13ff3f9635a3.json and https://artists.proofprofile.net/proofs/artist/dd19d02d-1c05-4f31-b158-13ff3f9635a3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).