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 0x3ab86f6dfe1684ee4b76161c3da7610332ff1f3aadbe96bfe25c194937b9aa5e. 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/52846778-33ae-413f-89d2-50d1254b7f5e.json and https://artists.proofprofile.net/proofs/artist/52846778-33ae-413f-89d2-50d1254b7f5e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
ピアノよ歌え 第７集～あれも青春、これも青春
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 0x27b64f38d4cbfd655e8e6e3b0b45509ba566344517ac9f7060add7961181e3bd. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/JPTO00401748.
小原孝のピアノ詩集～また逢う日まで(阿久悠作品集)
小原孝のピアノ詩集～愛の讃歌(岩谷時子作品集)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c1a629b6ff4d8946e2cd5a43e148ca581e43ea021883dab4764d3a06ee7521. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/JPKI01115973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1185eb050ed8ceac85017aaaf757cdc5f91af80e3a83d8307d986ac9ff53f710. 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/JPKI01116005.
弾き語りフォーユーPresents ～ランチでピアノ2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c9536442a75e026c200531cd15d4bcb77ed8fc68024e60efdb0eb45c4122b8. 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/JPKI01411485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeceb901a5d6bf220338b47434de3906ae67ef144e4642508059b8ff09047c87a. 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/JPKI01411489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd85df2b20cb6ccfc3c99e76a8b9a2680c2869b18a70fdf23431c72257c487b5f. 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/JPKI01411494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887b45ea3e6351aa3008284370b54aeb1fe9808076ced67165ae42bacb2db124. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/JPKI01411499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc8a6cc9d25059373b9c65df533aafb6c79b6120671b3933b18bc8d842c7334c. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/JPKI01411500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45049e0281faa8c1618d0e0e40ad04771273378f022225969334b063bfc7e26. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/JPKI01411501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb13d996a52d935868ed18c2a699c09af80087a399fd50b1eefa70cdc4f48b6. 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/JPKI01411545.
弾き語りフォーユーPresents～アルハンブラの想い出
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ecbb9276e22c740b85493cfb6b13cb3dc75192299e67b7baf8985bf62650da. 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/JPKI01512340.
弾き語りフォーユーPresents～ランチでピアノ3
ピアノ名曲フォーユー～日本を奏でる～
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x594f143d1ed35c826ed03a266f5d171fa5f3491faf27089b6d380a50c0915f9a. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/JPKI01810958.
ピアノ名曲フォーユー～あなたが大好き～
小原孝のピアノ・カフェテラス～やすらぎの時間をご一緒に～
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4055fe3594f73b544d386028eb9f1b85a7a53d3bfc6531ba910cb1cf2ffd9edb. 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/JPKI02012626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb80870095b0e70d848c6d030c790fb337223542c17db00adf4e6e38efa2b79. 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/JPKI02415799.