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 0x3a9c40488af9edbefc0e37a2eb4d6b0a02cedf791c972ed364cc1f6028b3bda6. Chain 2 (Bitcoin): anchored in block 953794 (2026-06-15T13:43:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e127aa61-15ac-4af1-bfd7-dd4210fe6f92.json and https://artists.proofprofile.net/proofs/artist/e127aa61-15ac-4af1-bfd7-dd4210fe6f92.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
1:正直（ブルグミュラー：25の練習曲 作品100）
ブルグミュラー 25の練習曲 作品100番／グルリット 初歩者のための小練習曲集
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 0x8aa9f1fdf4d9510e58d89a9d7c52e45d45f8246dfe910139381a33b3666bfa60. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPVI07308270 — a six-check JSON result.
2:アラベスク（ブルグミュラー：25の練習曲 作品100）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99947b5bd7b6f8d1e74625d2f21f8e98d6a9bef0e59f94f5fa4948b97b629404. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPVI07207180 — a six-check JSON result.
3:牧歌（ブルグミュラー：25の練習曲 作品100）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf647d67b9da9560040e1d767ef771d82a337321ef83dc85caaa98673e5393ef9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPVI07308280 — a six-check JSON result.
4:子供たちのつどい（ブルグミュラー：25の練習曲 作品100）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10490ed24def79d361b87174ca98478393c62ca0db39267627c5f656262a2cc. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPVI07308290 — a six-check JSON result.
5:無邪気（ブルグミュラー：25の練習曲 作品100）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6595e2e7b5ab1c26ebeb3f3fb765b48aa52fbfdd5baed4f06b2a619db96e972. Chain 2 (Bitcoin): anchored in block 960155 (2026-07-29T22:13:32Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPVI07308300 — a six-check JSON result.
6:前進（ブルグミュラー：25の練習曲 作品100）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2f0fcd6a7693eb768dd5cd7cfe011a0a4fb143c14644455f9840e22fa748d4. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPVI07308310 — a six-check JSON result.
7:きれいな流れ（ブルグミュラー：25の練習曲 作品100）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda10401cd6c31e6666b17fdeff161968f3adf06b203d91745903a3b91cfe6c84. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPVI07308320 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb930a2b063422679c18746c05cfcd0d3da2c5ae15e47b9d002783c4219583c46. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPVI07308340 — a six-check JSON result.
10:やさしい花（ブルグミュラー：25の練習曲 作品100）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895b92a4c3d0e566b980a0ab257194807d58217e96774201f6777f0e227bb273. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPVI07308350 — a six-check JSON result.
11:せきれい（ブルグミュラー：25の練習曲 作品100）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11927e24c0e03466a3b3fa7865694f997454134b8ce2ac65a47ece67569b93b9. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPVI07308360 — a six-check JSON result.
12:別れ（ブルグミュラー：25の練習曲 作品100）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf08594fa5f0c32c3f9195533a68e3d39e12eed80d738548a4a032812769de35a. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPVI07207190 — a six-check JSON result.
14:スティリアンヌ（ブルグミュラー：25の練習曲 作品100）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58bef755ce19ca816e1f201476201207c78eaee318176f91c6f4bc202ba4923. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPVI07207210 — a six-check JSON result.
15:バラード（ブルグミュラー：25の練習曲 作品100）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b1115656b1f7a03a0390508c84c062acf5a06c7dc5b5a38acd12ff682190d7. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPVI07207220 — a six-check JSON result.
16:あまいなげき（ブルグミュラー：25の練習曲 作品100）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e344cdd018e8fda82e4e55817adfcd2b7268c4b4dbc3012cf364a22e461a793. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPVI07308370 — a six-check JSON result.
19:アヴェ・マリア（ブルグミュラー：25の練習曲 作品100）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef5752162734a9e78e9b65bce10260bae53cd0c223e9f805126430c81c7b5a3. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPVI07308400 — a six-check JSON result.
20:タランテラ（ブルグミュラー：25の練習曲 作品100）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3f2e278c8c93096d67f2ae34129f1e561e8c878efdea433104f0340cb806e4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPVI07308410 — a six-check JSON result.