Tootsi is a borough () in Põhja-Pärnumaa Parish, Pärnu County, in southwestern Estonia. Before the administrative reform in 2017, Tootsi had a municipality status of its own as Tootsi Parish () within
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 0x9b6e707e2704f2edb8d030f6fe44c3b0f63621af4bdf0c404da6db08380029f8. 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/70a38d90-a585-41d5-9e31-5b6df5b49f21.json and https://artists.proofprofile.net/proofs/artist/70a38d90-a585-41d5-9e31-5b6df5b49f21.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).