Masaki Ueda (; born 7 July 1949) is a Japanese R&B and soul singer and composer. Life and career Born in Kyoto, the son of a doctor, Ueda spent part of his childhood with his grandparents in Himej
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 0x77cc96594f2181da44f011d4d97b6c4f55ecf8221f5e2214d33e586eef7d95df. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bf7409d5-cff1-4289-97fa-dc88077eefa0.json and https://artists.proofprofile.net/proofs/artist/bf7409d5-cff1-4289-97fa-dc88077eefa0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x17412534ac83a64eb7e174dd32deef7cde4a692d6ea2728f8c3d65061f467937. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/JPSR08222120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18cc5b586bbd707fee37dba308b025e0d9795f2bd7b10b8efdf3e2be89e09c0b. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:57:24Z), 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/JPSR08222180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf49b17af6c9287bfc9aaaea6c0bf9bbd5f572c7f9c718dd505c9b1812acb7f5f. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/JPSR08219800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa052a6ed7ff19f6064b482a14de1e598ee6c47f16688b49e76b72e009635282c. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/JPSR08514550.
ユー・アー・ソー・ビューティフル
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c097620541d9266d6e291500c2c06db86561aeae155afc08d9608d78366a47e. 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/JPSR08337730.
上田正樹ライヴ プライベート・ファイル
悲しい色やね（オリジナルカラオケ）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf49b17af6c9287bfc9aaaea6c0bf9bbd5f572c7f9c718dd505c9b1812acb7f5f. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/JPSR08219800.
エッセンシャル・ベスト 上田正樹
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6bb8fb23e0e1e3e1eaee4b5fe743e9ec41e041e29107ca2ac4613739be85394. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JPVI00917930.