Kuula is a surname. Notable people with the surname include: Alma Kuula (1884–1941), Finnish singer Heikki Kuula (born 1983), Finnish rapper, record producer, and graphic designer Toivo Kuula (1883–19
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 0x21d35b99b5a6af3983bc4c38dbb06284ad6523f93836111c5024d17e687c255a. Chain 2 (Bitcoin): anchored in block 954659 (2026-06-21T06:14:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dcbea3eb-83d3-4e48-acfe-1d1d3f010ea6.json and https://artists.proofprofile.net/proofs/artist/dcbea3eb-83d3-4e48-acfe-1d1d3f010ea6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Toivo Kuula: Complete Works for Mixed & Female Choruses a cappella