Roberto Piumini (born 14 March 1947) is an Italian writer, known particularly for his children's stories. Born in the town of Edolo in Lombardy, Piumini graduated with a degree in pedagogy from the U
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 0xead72b2ffe04842799ef21fdd46ada31b5889725c203d95505100b1f682f9047. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9b17e4e5-1cd5-455f-8ea5-2e4a26a06697.json and https://artists.proofprofile.net/proofs/artist/9b17e4e5-1cd5-455f-8ea5-2e4a26a06697.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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