"Kooda" (stylized in all caps) is a song by American rapper 6ix9ine for his third EP Day69 (2018). It was released commercially on December 3, 2017, for digital download and streaming, through ScumGan
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 0x5f3397893342694d969241f1ea349267f0be85cb04eb6155fb7076cc53b33e28. Chain 2 (Bitcoin): anchored in block 953907 (2026-06-16T07:39:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/162748aa-6700-4cc2-a561-c11e39fb8f95.json and https://artists.proofprofile.net/proofs/artist/162748aa-6700-4cc2-a561-c11e39fb8f95.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).