Soru may refer to: Renato Soru, an Italian internet entrepreneur Sõru, village in Hiiumaa Parish, Hiiu County, Estonia Soru, Azerbaijan, municipality in Lerik District, Azerbaijan Soru, Nepal, rur
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 0x6bf2547c0432dafc2a0d1e5b00d01f204a23a2969a3a79ee55c2ddd03e7cf3eb. Chain 2 (Bitcoin): anchored in block 953871 (2026-06-16T01:46:03Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0733ea22-77f1-469e-8c9c-4f1c0fdc7da3.json and https://artists.proofprofile.net/proofs/artist/0733ea22-77f1-469e-8c9c-4f1c0fdc7da3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).