Salla, known as Kuolajärvi until 1936, is a municipality of Finland, located in Lapland. The municipality has a population of () and covers an area of of which is water. The population density is .
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 0x52a9c7214002ec5d3b0ead78efdc98d8fe72d89c4408e61ec5dfa3a4d54450d6. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/64fa1967-e738-400d-bfd6-1a6ed3f9527e.json and https://artists.proofprofile.net/proofs/artist/64fa1967-e738-400d-bfd6-1a6ed3f9527e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).