Kalle Mattson (born Kalle Mattson Wainio, September 21, 1990, in Sault Ste. Marie, Ontario) is a Canadian singer-songwriter based in Ottawa, Ontario. He has performed both as a solo artist and with hi
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 0x0aedd0a08188a82e29ec0f382674bca40a8ef80d25a39a1ce2ae4b66104ed698. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/55c6ea9d-01d9-4816-8333-28e77e70812d.json and https://artists.proofprofile.net/proofs/artist/55c6ea9d-01d9-4816-8333-28e77e70812d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).