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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5427780037fc0b5ad54ca646d4c638c5c5bbf6284c1608d0669e1f6e5a9fd83c. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/78869b96-8bb5-48e7-bc37-0242cfb4397f.json and https://artists.proofprofile.net/proofs/artist/78869b96-8bb5-48e7-bc37-0242cfb4397f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
私を呼んだ 夏の空のような (feat. 兼松衆, 須原杏, 関口将史)
私を呼んだ 夏の空のような - feat. 兼松衆, 須原杏, 関口将史
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235a945750ad257e9a119e81d8cf6b53874d35b8379a6441dd5ce69a73bb2c9c. 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/JPG102301037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ce0e58dbdf76321e35d8a5b5e5ac4d3781f2449139dbb7aadeddbce4edabed. 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/JPG102300696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d53c02d7d91414ef4224d5082d3e291d6cd350b47029736e05b027d6523043. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/JPKI02118181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70582c860e8be059cf3a1d422fa1b7fc048fc10e8a77c856f1f15f762cdeb9e2. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/JPS801962704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x198a1ba11891c03de5c711fd2708173a0eb0c26c648989baa72b06e949dc3058. 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/JPS801962705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd7d736e25ec1da2bf13b1e95e35af6a3491a2609b6869170277da91f25ff57. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/JPS801962706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e429488127bd09606e0f1a23e24ac63f4373f362f93cfc1e51e8f73c587235. 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/JPS801962708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb9edfdf4db4468da894014761e344d7733237386a88e81224ed32eb03b5efb6. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/JPS801962709.