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 0xd60b8fe832b1504ebf725832a06f0e408cbf023de9e5e34e798b6ed550c7f2ff. Chain 2 (Bitcoin): anchored in block 954502 (2026-06-20T05:07:36Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9c1ef4ad-7458-4f85-83e8-0b876e4632bc.json and https://artists.proofprofile.net/proofs/artist/9c1ef4ad-7458-4f85-83e8-0b876e4632bc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
全日本吹奏楽2002金賞団体の競演 高校の部I
「ミス・サイゴン」より 序曲、我が心の夢、サイゴン陥落、今がこのとき
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 0x02d6fa6b7e9b81c9d8ce0f94c86bba0a5d6d79f9e7dd78459d1034cf6eeed018. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/JPVI00238230.
全日本吹奏楽2001金賞団体の競演 高校の部II
千葉県／習志野市立習志野高等学校吹奏楽部
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b2eefd81bb8896009038b5a52fd604ab7fcce4aaa9017aea31cfce96c77887. 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/JPVI00135920.
式典のための行進曲「栄光をたたえて」
北海道／東海大学第四高等学校吹奏楽部
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e06b83f9e7e4dcfcb1a797289450a6b4a5256241edebf2e5b65ef23d43c4a5. 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/JPVI00135930.
大阪府／大阪府立淀川工業高等学校吹奏楽部
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8490fc249de07bbc26ce64c87fa0fd4235eaa76d83072f3b27885e73a31c6632. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-21T17:35:36Z), 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/JPVI00135940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90afcbcb9d2c9fe6eabdb8be70c7948a246818ff34c886317c4fb43d887ffc70. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPVI00135500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f869b40346fe9585199e658c2901bc966363119357ebc0e9c720c8f77d2468a. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/JPVI00135410.
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
全日本吹奏楽2003金賞団体の競演 高校の部II
課題曲II.イギリス民謡による行進曲
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba06f8c18f68f08ff5099ad3561a4e8b6bfd786deaccd1a4c1176026d501b69. 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/JPVI00333390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9d47d6daf91862dbc5397d49e698ea7285f41192133c652d4159374071997f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPVI00333500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd8e84246fcf27d9f5ce305bdc82b68c8d7f81187c9791b29a57ae46cafb94b. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/JPVI00333400.
全日本吹奏楽コンクール 名門の饗宴！高校III
北海道／北海道札幌白石高等学校吹奏楽部
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b712adef6634b0e8069d0f1113106477c3c7538321cb80cc69b1bddaac9bdc. 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/JPVI00333250.
島根県／出雲北陵高等学校吹奏楽部
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a3ef1e43915a5eeb6c8606ec75799851265384f9f8dfd9a566e8ef8c8674ed. 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/JPVI00037710.