Yezda Urfa was an American progressive rock band founded in the fall of 1973. The band recorded two albums before breaking up in the spring of 1981. The band's music is currently distributed by Syn-Ph
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 0x67d1e6b953e2a4cb4bf43ad0d697aa2f5c6ca5e6beaedcf66b3eb9a425ab3ad8. 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/5e493f72-7a29-4d85-b26a-9df5262d6c89.json and https://artists.proofprofile.net/proofs/artist/5e493f72-7a29-4d85-b26a-9df5262d6c89.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).