Slitu is a village in the former municipality of Eidsberg, Norway, now part of the municipality of Indre Østfold. Its population (2005) is 543, of which seven people lived within the border of the nei
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 0x8ff0f53ab95c9ed0abaf156854246981c241c455f595a3151ccdd9dc1d0a1ef5. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c3f8f35c-4b67-45a6-b364-87ba2c409e26.json and https://artists.proofprofile.net/proofs/artist/c3f8f35c-4b67-45a6-b364-87ba2c409e26.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).