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 0xa8cb5662dbdc7e8a024b29088d4f511e2311790b28b172caace54614ab3dfae4. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c2d8ae9d-0608-4e4e-ae17-eefa8b7a762d.json and https://artists.proofprofile.net/proofs/artist/c2d8ae9d-0608-4e4e-ae17-eefa8b7a762d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
カリヨン / 幸田浩子 〜愛と祈りを歌う
あなたの優しい声が 〜イタリア&フランス・オペラ・アリア集
ワルツの夢 〜幸田浩子・イン・ウィーン
幸田浩子 マイ・ベスト・セレクション
優歌 (ゆうか) ～そばにいるうた、よりそううた
ARIA 花から花へ 〜オペラ・アリア名曲集
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 0xca19a369bcff58e8ba476340edabc2fd19f6278d191bae1d744d504a477f9943. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/JPCO01933070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e6de507dc05ad29855f8e2cd11bf4344d5b4e79e300a4d8219c41d43c390f2. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/JPCO01933110.
Klassik die man kennen muss! Die größten Werke der Klassischen Musik
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d31d2dc755c6611a4c54c31f760d9d77647646240ab06219a1cc3bb64eabba. 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/DEP621800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c99469e401f2fa96152fa3a2cd8e8c125ee09159cbb97ed0e325593c61557a. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/JPCO00731140.
麗しの女神声 〜立てば芍薬座れば牡丹歩く姿は百合の花
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a7ecc54f9faebe9e2445c74460f2e798783db672a07f2754af399f93a97a66. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/JPCO01305160.