The Ceno is a tributary of the river Taro, flowing entirely within the Province of Parma, northern Italy. It joins the Taro on its left bank at Fornovo. Like the Taro, the Ceno has its source on M
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e7925f179e4219a7b775846c4d52284cc176e052e6ff913123d0bd54fdfa1d. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/848bfe5c-f2c5-45f7-bc5e-438019a257d5.json and https://artists.proofprofile.net/proofs/artist/848bfe5c-f2c5-45f7-bc5e-438019a257d5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).