Brusio (; ) is a municipality in the Bernina Region in the canton of Grisons in Switzerland. History Brusio is first mentioned in 1106 as Bruse. It was first mentioned as Brusio in 1212. Previously i
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 0x00d7bbcc015502ecbcf2ff69ff9f5c305c21923aed54c31d914d9f14e54c461d. 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/8d4346a4-5e05-4096-a349-4ef739948b94.json and https://artists.proofprofile.net/proofs/artist/8d4346a4-5e05-4096-a349-4ef739948b94.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).