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 0x73fd08d7a4beae0193e9a69ecfb7738b15e8fe9c39bdf0b8ab08672c4dd00eb5. Chain 2 (Bitcoin): anchored in block 954043 (2026-06-17T04:15:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3deed0fb-f1c9-4dbb-9d8e-3502ec3b3d51.json and https://artists.proofprofile.net/proofs/artist/3deed0fb-f1c9-4dbb-9d8e-3502ec3b3d51.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
ヴァイオリンのためのオリジナル曲
ヴァイオリンとピアノのためのソナチネ ト長調 作品100
ヴァイオリン小品集１～埴生の宿変奏曲～
ヴァイオリン・ソナタ第3番 ニ短調 作品108
ヴィヴァルディ 協奏曲「春」 マイナスワン
ヴァイオリン小品集２～モーツァルト集１～
ヴィヴァルディ 協奏曲「秋」 マイナスワン
ヴィヴァルディ 協奏曲「冬」 マイナスワン
ヴィヴァルディ 協奏曲「夏」 マイナスワン
チャイコフスキー：3つの小品 Op.42 「懐かしい土地の思い出」
ドヴォルザーク：ロマンティックな小品 作品75
ヴァイオリン小品集３～田舎のメロディ～
CHIM CHIM CHER EE for Violin Solo and Piano Quintet
バッハ: 無伴奏ヴァイオリンのためのパルティータ 第3番「ガヴォット」
朝のクラシック -爽やかな目覚めのためのクラシック名曲選-
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 0x0aa1d0712dc46958a053f3e6287a5a416643162867c6d9b2134716d00ab24694. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPW792139726.
ベートーヴェン: 6つのメヌエット 第2番
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ff8fe9534e638934941995b65d8e55c125a3a85033036690c23226629b158d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPW792139707.