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 0x223111bbd0499828f112910993e8437e96a5623a77fc5663f008f57db5883c89. 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/3c3852ff-f47b-48b0-9681-c30b60e6a92e.json and https://artists.proofprofile.net/proofs/artist/3c3852ff-f47b-48b0-9681-c30b60e6a92e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
きらきらピアノ こどものポピュラーメロディーズ２
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 0x0c2853c5b99a6964c3cdd8ebfc75dd65b14f1ac1be8aa0c3b84e55c082e06689. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/JPVI01234520.
きらきらピアノ こどものポピュラーメロディーズ１
きらきらピアノ こどものピアノ名曲集１
家路～交響曲 第９番「新世界から」第２楽章より～
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b7b180d2cae123ceaeeaf4acc9ee64443dab51a8e00bbfc711c1233e44aa63. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPVI01232890.
きらきらピアノ こどものピアノ名曲集３
きらきらピアノ こどものピアノ名曲集５
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d0e32defad07cd90e66ce9148ad427c8422a52b053146cb9ad0b6b1793de7e. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/JPVI01233810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5de825c82f84ecdd1936cb380a29cdda97fe1b8565d05e9b226ce8751615a0. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/JPVI01233840.
きらきらピアノ こどものピアノ名曲集４
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809ead22e7d56bb6158d4c970b0c73ba8b88939498364f11c8197302be26658c. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/JPVI01233630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0755425b608b582ba7f0a0ccfb0c6fd5cf70c581317ee095a2d1f09bd5444cc4. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/JPVI01233740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d5d6b3286c45f532d655b8998c5a1670a92f693f8d9be45d8f9fa811951987. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/JPVI01233770.
きらきらピアノ こどものピアノ名曲集２
きらきらピアノ こどものポピュラーメロディーズ３
Ongaku Kenkou Yuuryouji 2 Sawayaka Egao no Ongaku -Selection-
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82349752cafccbf98335ac7650fba73e3b9fe5ebf9324a48c4ce2edb5c4dd559. 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/JPVI01233650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb47cd229132df99f06fb793971cf5ea7259b0c252652d7b1ea5ee9510da30110. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPVI01233830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd98e0692eb6d60f983b4cf6d329bea08469ec0f2c535ae4a81adcb8b46f82f69. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/JPVI01233750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d5d6b3286c45f532d655b8998c5a1670a92f693f8d9be45d8f9fa811951987. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/JPVI01233770.
アメイジング・グレイス（作曲者不詳、轟千尋 編）
もしもピアノが弾けたなら・・・ 弾いてみたい名曲 35
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bebb0a9d51df47dfbf48d28922616ea5ac5a106e0a320be2437a29387e1b2b4. 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/JPVI01234810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5de825c82f84ecdd1936cb380a29cdda97fe1b8565d05e9b226ce8751615a0. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPVI01233840.
Ongaku Kenkou Yuuryouji 6 Oyasumi Melody -Selection-
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbcd7cc23a030c26c74427431a18239b447c5c23caf3e9cf3005e392abdb2fcc. 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/JPVI01233860.
Ongaku Kenkou Yuuryouji 1 Sawayaka Mezame no Ongaku -Selection-
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43c145d528ee80141b954f3b874b9f161a8d74ec177be72e31def93ae74ec2e. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/JPVI01233850.