thumb|Hawai'i mamo (Drepanis pacifica) thumb|Black mamo (Drepanis funerea) Mamo or woowoo is a common name for two species of extinct birds. Together with the extant ʻIʻiwi they make up the genus Dr
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 0x000da9357d3df8926b2ec830553b0d31c1e30a58b56d84778977df6c5399c71d. 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/4816f6f0-5691-415d-9f80-efd448a7e705.json and https://artists.proofprofile.net/proofs/artist/4816f6f0-5691-415d-9f80-efd448a7e705.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).