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 0x4d7377e64e1ff4c62cd9af18f4443cded0dc2b388e29b93aea8fcf61f1f51e36. 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/490ee323-c2c4-43d8-baca-b20969cd58ad.json and https://artists.proofprofile.net/proofs/artist/490ee323-c2c4-43d8-baca-b20969cd58ad.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
白鳥／夢のあとに◎珠玉のチェロ名曲集
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 0xc98b690ed0c3bcef4a40e85ebaae9588cc69439395166e41d1933098aadeaf76. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/JPVI08809310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3609a7dac249ab05522823a5ced601b2ec06af0f30080b5f2918d6e02325319d. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/JPVI08810630.
ハンガリー狂詩曲(ポッパー)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc75a7f7c6a73041a3eeb6fca3c3227d4f47a8039ade0cf0cf81f5b9fca4c9ca5. 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/JPVI08811170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fcccc6a7bf28d905584530f9dd15ed9e07ae5c9f076ba50bd10cb288c5938e6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/JPVI08808860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462684003b705f414fd74a761640f303dc6b5f3fc72ed95f5ab0ecbadb2ae9d6. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/JPVI08810620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9333c4cf180b02c04a06373429f22172c2cd6dec5e877fb636cffebe53cac771. 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/JPVI08811210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946046a97b54022cfba7b86ab018501ca4dc8fc83fd2fa6498dcf1158ab4d1c1. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/JPVI08811220.
序奏と華麗なるポロネーズ Op.3(ショパン)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8698da5eb9acb03d41ad89cc00d4a5d6922353bc70d820aa6caa370ffc324f0c. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/JPVI08811230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8308b315e00f90e46d8e5c68ead8c9ee97491f8db7a2f0ea075334e338a933. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/JPVI08810640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe81d829d61918365b43e67f9aea56e93a9ac4029314f48973faf7cb92813d92. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/JPVI09628870.
シューマン＆ドヴォルザーク：チェロ協奏曲
長谷川 陽子◎バーバー＆エルガー：チェロ協奏曲 他
カッチーニのアヴェ・マリア（ヴァヴィロフ／朝川 朋之編）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d40cc9cdf69e248a52e84b272e8793764a713144c0be2a0d4c832fec3a38ab2. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/JPVI01016100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51da9833ecf45a825b50a7b11bf9f077ac80f8f004680cfd8916e53f125aeb9. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/JPVI01016170.
アンダンテ・カンタービレ(チャイコフスキー)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d3717dea91b375d3373478d088f9456243ccca8b62008eea8c2caa0b01a5c3. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/JPVI00132780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3003a710dc2f2b1133eaee5f11a6324b7d7a2388cd732c6d1fe44a072be746e. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/JPVI01229420.