was a Japanese composer. Biography He was born in Tokyo. Yashiro entered the Tokyo Music School (presently the Tokyo National University of Fine Arts and Music) in 1945, where he studied composition
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 0x1aa3547be83143d7572b0c251934c9f3bc0a9472e379afe68ee1dc2b7f8d7570. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/49641747-cf65-4938-a39f-8e2ff8672790.json and https://artists.proofprofile.net/proofs/artist/49641747-cf65-4938-a39f-8e2ff8672790.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Landscapes. Takemitsu, Hosokowa & Nishimura
Yashiro: String Quartet: I. Adagio ma non troppo
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 0x6e95b9e41a92e776e1c4f1dbe4f860a4ab11dfd1680823f866159836aa83ebd3. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/DEA809945201.
Nishimura: String Quartet No. 2 "Pulses of Light": Pt. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ecaa7bb6dc403a1a1eec97b158ea1463236c5587f6065361465d87485efbc4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEA809945301.
Hosokawa: Landscape I, for String Quartet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6246bf9a69f2d3e37524fb1014ef04b6eca23cdacd9b214033578d3cd8861f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEA809945400.
Yashiro: String Quartet: II. Prestissimo, un poco misterioso ma scherzando
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a9577e356cda48f18b6ae72dc1b5a37fc257ec5def4c15c2ae347667a2b19b. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/DEA809945202.
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
Yashiro: String Quartet: III. Andante espressivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0dea63fcb6332b5839ec4e88922d28b29654cc74a5fc369764b82f073e01a2. Chain 2 (Bitcoin): anchored in block 960230 (2026-07-30T08:32:18Z), 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/DEA809945203.
Yashiro: String Quartet: IV. Allegro giocoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249014ff191195858a7417e92d34c635e702ae4afa3f5cbfdf21550dd66cf6c0. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/DEA809945204.
Satie, Debussy & Others: Works for Piano 4-Hands
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ef53780c0a7b8c08c1a59d94eaf9cf51c73af6840f5422e468d362809788b4. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/JPP591253158.