Siimes is a surname. Notable people with the surname include: Pentti Siimes (1929–2016), Finnish actor Suvi-Anne Siimes (born 1963), Finnish 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8df189f48fff26520d6bed9f862884609952a6948e4e3130fed71e731beca0d. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f7af3169-74ab-4b46-9a78-c12db160cfd2.json and https://artists.proofprofile.net/proofs/artist/f7af3169-74ab-4b46-9a78-c12db160cfd2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).