thumb|200px|right|Keitaro Harada, Conductor Keitaro Harada (, born February 26, 1985) is a Japanese conductor and music and artistic director of Savannah Philharmonic, Permanent Conductor of the Tokyo
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 0x95726ad3d1973b0759570f6d0eb09851cecb384a832d5096c36f8b987eb7f5eb. Chain 2 (Bitcoin): anchored in block 953616 (2026-06-14T08:58:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/18166fbc-0072-4e85-b1ee-ff51272e135a.json and https://artists.proofprofile.net/proofs/artist/18166fbc-0072-4e85-b1ee-ff51272e135a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Takashi Yoshimatsu: Symphony No. 3 / Tarkus
Kamui-Chikap Symphony Op. 40 / Chikap Op. 14a
上原彩子 チャイコフスキー&ラフマニノフ2大ピアノ協奏曲ライヴ
Aconcagua: Piazzolla, Falla, Ginastera & Guarnieri
Danzón: Copland, Bernstein, Walker, Piazzolla & Márquez
Takashi Yoshimatsu: Cello Concerto, Op. 91 "Centaurus Unit" / 4 Little Dream Songs
Cello Concerto, Op. 91 "Centaurus Unit": I. Allegro
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 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 0x88670cbb49a717c5773978338751940dc2de7e8cfbe8f3f93bab811cfe2b91d6. 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/JPCO02400990.
東京交響楽団 Live from Muza!'' モーツァルト・マチネ 第 40回