Erja is a village situated in Haapsalu municipality, which is located in Lääne County, in western Estonia. Prior to the 2017 administrative reform of local governments, it was located in Ridala Parish
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 0x6146df7f79ed4ddd2826848fd5f5be45be25480c4794fb200dff386a4834ca7e. Chain 2 (Bitcoin): anchored in block 954039 (2026-06-17T03:00:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3e8aba20-94ff-48a1-be3e-96dabc66be6f.json and https://artists.proofprofile.net/proofs/artist/3e8aba20-94ff-48a1-be3e-96dabc66be6f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).