Sobrio is a former municipality in the district of Leventina in the canton of Ticino in Switzerland. On 10 April 2016 it merged into the municipality of Faido.Amtliches Gemeindeverzeichnis der Schwei
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 0x0bd0497e035c92843a98940cbb7109d30313bdc3361fdc34119621f062821e80. Chain 2 (Bitcoin): anchored in block 953943 (2026-06-16T11:59:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2054a362-4463-4cf0-8e98-5ba15b5defa4.json and https://artists.proofprofile.net/proofs/artist/2054a362-4463-4cf0-8e98-5ba15b5defa4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).