265px|thumb|Presentation of «Latcho» right|265px|thumb|Zaxidfest-2013 right|265px|thumb|Presentation EP «Percha» Trystavisim () – is a Ukrainian rock band from Uzhhorod, Zakarpattia, Ukraine. Descr
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 0x9d6013a3f8c6e57ac561ab48c3f202fed674346c14165869a3aa75fe7b830630. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e7684c1e-8e20-4223-b269-a1c41a68b0c2.json and https://artists.proofprofile.net/proofs/artist/e7684c1e-8e20-4223-b269-a1c41a68b0c2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).