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 0x13358fe480856ea93d08c78799c99f31568baea2a0bef3cb09d496977fdff265. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fd6832b4-ffbe-4d84-96b5-0c967ff5d3ee.json and https://artists.proofprofile.net/proofs/artist/fd6832b4-ffbe-4d84-96b5-0c967ff5d3ee.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
ツキウタ。シリーズ5月皐月葵「カルミアと五月雨」
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589b007de59803f346bb6ea43654e19e94681f3906394170bb7cf757c3f6d6b1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPR501925525.
ツキウタ。デュエットシリーズ(年中組2)皐月 葵&卯月 新「月と、星と、まぼろしと」
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3060d6c5e84028e48a81319a74241251e4bacb53a9e5ec67006c15fe59abe6b. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPR501925688.
ツキウタ。シリーズ 皐月 葵「ハルカゼとヒバリ」
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b14db01a3c49f9eb894b9e462a86f02754f7ecae110a5a4e5d348921f6f892. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPD641501012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec5fb0fb7663dd449312d0a7d25af41d803f97a2e5cd2959ca1844a4696cc7bc. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPD641501013.
ツキウタ。キャラクターCD・4thシーズン6 皐月 葵「リーンカーネーション」
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b484fc79c9d7a76f2b89d56249048fac37da63636ff4047e7596e49a9e8fc83. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPR501925882.
「ツキウタ。」キャラクターCD・5thシーズン6 皐月 葵＆長月 夜「梔子の花」
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee87e97a0087aefd66d97d891456659e7090a80a0a2ed804c09f8db5e5889d76. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPR502301619.