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 0x23bff9534c19ca760429f870b819a056cfaf2aba395805f352741cecaf3bd915. Chain 2 (Bitcoin): anchored in block 953620 (2026-06-14T09:36:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1db7a93e-638c-478b-9aaa-cde5ec4bbdb9.json and https://artists.proofprofile.net/proofs/artist/1db7a93e-638c-478b-9aaa-cde5ec4bbdb9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
ビューティフルヨコハマ / 太陽は泣いている
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 0xe80380836b07245017875eea5ca42ce8846cacc1fe8de96fdb63ed73c0504eec. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/JPCO01326960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa16cc63ec5f11bd1e951155c680afb7671e34c3dd9e3ce2cef64ecf91ed68c1b. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:08:34Z), 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/JPCO01326950.
イミテイションゴールド / Mr.サマータイム
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98790f15d2b6f8ed21dc722e3eb640cd320bd4f7e8e80ed9f5ebc836f80802f. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/JPCO01328480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4cca8c2c844d82882bd8a5dd5cbc41e01929ffd0ec0d5855a8d1e44b3ca0738. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/JPCO01328500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058914f5be6e4eee2f0e76b09123dd30d4ccdb54671c977457307494b678e445. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:18:28Z), 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/JPCO01420170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9edb624f8339cd0287cc79559e554f6c5c6338ebabf2079c373dcb1d80f1fd8a. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/JPCO01420220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720eac78570266dadf2ef51516d08cce06c1a536ff176a761c532aaaddee5fdf. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/JPCO01439630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83cc3cefc3da662450af2cdeaf77c9e73f5506b9884a292d314b35017b85350f. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/JPCO01439650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309bd30d14e28db86d4e2064dc93f5a74264a85f604a500fd7633c97defe6c5e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/JPCO01439680.
マザーグースからはじめよう! 3さいからの英語シャワー～きいて・あそんで・うたえる英語のうた～
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0e3037ba7ed51659e4917caa565e710f7e92776d240e7f90093136b26ec51a. 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/JPKI02215865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801194bc707e9215aa0f64d206f57d92df97976590638897aa203cb89bac9141. 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/JPKI02215867.
Star Light,Star Bright(スター・ライト、スター・ブライト)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9459d0d0a6cc8e5785f63efa79ff2e18fbfe3f9a3a1a3931b8e5ea53deaaa40a. 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/JPKI02215868.
【ミニ英会話】ほめ言葉いろいろ・おやすみなさい
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e8e8fca46219aa5c7f0864f89e3937eb6c0522390eb50ebf8b224cd00c564f8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JPKI02014191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c72115d4477ab611b600925288209e0e67176d6e8949bd9a4966ad63aacec4. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/JPKI02215864.
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
Polly, Put the kettle On(ポリーちゃん、やかんをかけてね)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489dd15900c118d382e1cfdcc109ff9ecdb9306362e2aded6589bf28168c5d98. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/JPKI02216117.