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 0x91df15f8f672f6f20d3569c4f7bf4dca86e1065a6c9cd4361aacf3b368b429bf. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/55a03888-2dfe-4a98-a1d0-dfb632694943.json and https://artists.proofprofile.net/proofs/artist/55a03888-2dfe-4a98-a1d0-dfb632694943.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x08890908338bbee07bd805f604c25848b7d37658edde49e02db99ec6ca76e20e. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/JPI102402196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7be1d5ee7d8ca22141cc07f6a4eeecdde62ebd5525dabc3f5d301e99b7ce363. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/JPI102402415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22d5a65b49252a94499e68306a3a32c2b8414bdddbbcd1dde9bea5b3c84e7cc. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/JPI102500634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4a3599f3ed74680e089c73f82c6cc597899439729517a23c180c262ab6dc74. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/JPI102500892.
スゴすぎ前橋ウィッチーズ！ / それぞれのドア【エンディング盤】
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7be1d5ee7d8ca22141cc07f6a4eeecdde62ebd5525dabc3f5d301e99b7ce363. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/JPI102402415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6818f490a3b2059371b226ab4b850207725a5b15793624f850b2f5c51a34048. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/JPI102402411.
スゴすぎ前橋ウィッチーズ！ / それぞれのドア【オープニング盤】
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6818f490a3b2059371b226ab4b850207725a5b15793624f850b2f5c51a34048. 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/JPI102402411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3beb563a620181f4d3b5fdc3dd215b13281206413b30d68f535a1a768218c7e. 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/JPI102502109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2ac3f4033ce3417764191f727e85d1ddc126a86bdbb0186239621c49ab39e6. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/JPI102500903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77bec93a9b4689b2665897469a2f1d7b98ecc298a60a910bda030542d9585928. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/JPI102502110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c6fc09408a6ef3812ec99a19ab67972db252e375089016368a1e9fd0929ac19. 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/JPI102502111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92505561948f403c95cfffe6c7866dcaa9d5d72f2ab9ee848a7e75780397c598. 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/JPI102502112.