Mats Persson may refer to: Mats Persson (consultant), advisor of UK prime minister David Cameron on EU affairs Mats Persson (politician), Swedish politician
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 0xdc7fd07b85587536a9031fec69aa4a36089032de076b68f1641428bbc75d0025. Chain 2 (Bitcoin): anchored in block 953928 (2026-06-16T10:21:55Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1d0e3123-b7bf-47f3-9d6f-4d56a5c8f431.json and https://artists.proofprofile.net/proofs/artist/1d0e3123-b7bf-47f3-9d6f-4d56a5c8f431.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Touch - Contemporary Swedish Music for Two Pianos
Strings and Hammers for Fingers and Nails