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 0xf3293c1308abb65d8946cb64a5eb0a82b1162cc58ab2a1128a3f367bc27d3bd5. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3acfa089-5610-44a0-88bc-0611fa68b476.json and https://artists.proofprofile.net/proofs/artist/3acfa089-5610-44a0-88bc-0611fa68b476.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
RETURN OF THE DJ TATSUYA 69 MAIN TITLE 7
RETURN OF THE DJ TATSUYA 69 MAIN TITLE 7 (Remix)
RETURN OF THE DJ TATSUYA 69 MAIN TITLE 12
RETURN OF THE DJ TATSUYA 69 MAIN TITLE 8
RETURN OF THE DJ TATSUYA 69 MAIN TITLE 2
RETURN OF THE DJ TATSUYA 69 MAIN TITLE 13
RETURN OF THE DJ TATSUYA 69 MAIN TITLE 0
RETURN OF THE DJ TATSUYA 69 MAIN TITLE 4
RETURN OF THE DJ TATSUYA 69 MAIN TITLE 2 (69 Summer Remix)
RETURN OF THE DJ TATSUYA 69 MAIN TITLE 2023
END OF HOLIDAY (Dj Tatsuya 69 Sleepless Night Day 2 Remix)
END OF HOLIDAY (Dj Tatsuya 69 Sleepless Night Remix)
RETURN OF THE DJ TATSUYA 69 (2023 6'n'9 Remix)
Hanamizuki (feat. Yo Hitoto) [Cover] [Reverse]
Hanamizuki (feat. Yo Hitoto) [Cover] [69 Remix]
Hanamizuki (feat. Yo Hitoto) [Cover] [69 Remix 2]
Hanamizuki (feat. Yo Hitoto) [Cover] [69 HOUSE REMIX]
ハナミズキ (feat. 一青窈) [Cover] [69 HOUSE REMIX]
Hanamizuki (feat. Yo Hitoto) [Cover] [69 Trap Remix]
Hanamizuki (feat. Yo Hitoto) [Cover] [69 Techno Remix]
69 Halloween 2022 (Tatsuya Uehara Remix)
可愛くてごめん (feat. HoneyWorks & かぴ) [69 Remix]
Kawaikutegomen (feat. HoneyWorks & capi) [69 Remix]
Kawaikutegomen (feat. HoneyWorks & capi) [69 Remix 2]
Kawaikutegomen (feat. HoneyWorks & capi) [Reverse 2024]
Kawaikutegomen (feat. HoneyWorks & capi) [69 Remix 3]
BEAT 69 5 (Tatsuya Uehara & Dj Spot g Remix)
Kawaikutegomen (feat. HoneyWorks & capi) [69 Remix 4]