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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ef4ee6bc347222d6a451cd71a933d9ef835d88788bc2a971723b6b41d420fb. Chain 2 (Bitcoin): anchored in block 954500 (2026-06-20T04:47:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9cc28867-75e5-4cb1-843b-cb701492a352.json and https://artists.proofprofile.net/proofs/artist/9cc28867-75e5-4cb1-843b-cb701492a352.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Fest-noz e Rostrenn, Kergrist ha Melrand (Live)
Fest-deiz e Rostrenn, Kergrist ha Melrand (Live)