Pubblico was an Italian daily newspaper briefly published in Italy between September and December 2012. History Pubblico was first published on 18 September 2012. The founders were Luca Telese who
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 0x2e826faa7853ec7a7d7f09da103317ee4c015569efa9dd77f2b6c8243a16607c. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cfbef3af-895b-4cd5-8595-e719b78071a6.json and https://artists.proofprofile.net/proofs/artist/cfbef3af-895b-4cd5-8595-e719b78071a6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).