Yunna may refer to: Yunna Morits (born 1937), Russian poet, poetry translator, and activist Ella Koon (born 1979), full name Ella Koon Yun-na, Hong Kong Cantopop singer and actress Yunna, a featur
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 0xfb6a26f68633ced5ed6757838a6cd9707587bedf52adb5195604614468a7d1eb. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/824f1c15-974b-4b44-bef4-f7170235ce34.json and https://artists.proofprofile.net/proofs/artist/824f1c15-974b-4b44-bef4-f7170235ce34.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).