Mamou (Pular: 𞤃𞤢𞥄𞤥𞤵𞤲) is a city and sub-prefecture in a valley of the Fouta Djallon area of Guinea. The population is 376,269 (2018 est). World Gazetteer , Retrieved on June 16, 2008 History It gre
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 0xbcee7299332f42607b139ef87fe97b0e3c9ad29248b7e0e857d44e7685fece51. Chain 2 (Bitcoin): anchored in block 954650 (2026-06-21T04:51:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d981ada0-d8aa-43d7-ae3f-d99311485cc1.json and https://artists.proofprofile.net/proofs/artist/d981ada0-d8aa-43d7-ae3f-d99311485cc1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).