Serena may refer to: Arts and entertainment Serena (genre), a 13th-century Occitan poetic genre Serena (1962 film), a British crime thriller Serena (2014 film), an American drama film starring Jen
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 0x1d0e3ab3ebac70184161e0443c96c67ace8699f5a91d927cc2b143a7ad381483. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ec335326-3cf7-44ce-a943-cbcd5e583402.json and https://artists.proofprofile.net/proofs/artist/ec335326-3cf7-44ce-a943-cbcd5e583402.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).