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 0xe31a56a2af6ac975e5bd4e471dfac255a531a2a06b7ccbbadf111ecf54d3f7c4. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8eec4427-b0d5-480b-b107-61bbfb58661a.json and https://artists.proofprofile.net/proofs/artist/8eec4427-b0d5-480b-b107-61bbfb58661a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
熱烈！アニソン魂 THE ARTIST SELECTION 稲垣涼子 ANIMEMUSIC COVER COLLECTION
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 0x6a9846056bde2e865961c5be3ba60dff5f743ad674a2a596a6d9a3635b4a9dd3. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/JPP751101234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a6e789c37c8b8c4eab4b4688653a5cf1e73bab9dde4c2b0d5e50e927f83da31. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/JPP751101235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e91732367c11c6e7e0fd428966cae7d8d2ee75abe728dbf818ca1468fee9c4. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:42:34Z), 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/JPP751101236.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f0921297ac1c3d393218827ffd02a5e77ab6b516acc4a5e6003e96147d8bbd. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPP751101237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4d070e992ba11ba3c02ea48d11935353fa9d6b80edcad4add29fe2f3e87850. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/JPP751101238.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f0b1efd3348ff24e3bb79c94cf06ce9b0bdb196d28e0082ea581909c7a5c28. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/JPP752100013.
炎 (『劇場版 鬼滅の刃 無限列車編』 主題歌)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb377ab66b1d45fee0ff96523e9e44a245c2e6eff59a51cdb3344b2a2a0475b8. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/JPP752000076.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a9c94f7c675582e234e8969517959649f55a4125f8066c724b115f4959a019. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPP752000046.
熱烈！アニソン魂 ULTIMATEカバーシリーズ2021 JAPAN ANIMESONG COLLECTION vol.62
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26df2c219c64aa9e6b30fdcf9f77a8bacd1be1a250d689d4a1fe00e78a5932a2. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/JPP752000065.
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