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 0xe6d77960766560e8b550228468df3ea89d2aabc15b965062a5b077c5ed7f30b7. Chain 2 (Bitcoin): anchored in block 953602 (2026-06-14T06:58:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0f50ed98-b0ae-43c6-890b-82cc82bbf766.json and https://artists.proofprofile.net/proofs/artist/0f50ed98-b0ae-43c6-890b-82cc82bbf766.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 0xa0f332d2d28942191e5f7d61246a13216789c4adca7cad7406633ae58e70e87d. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/JPCO07771030.
ミクタムワーシップソング/リバイバル
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x471ee0c9dae0e9e421ecbad87bbdcfd1ad73b01f14297bb742b381c54b17cba3. 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/JPS801856161.
主をほめよ高らかに - 楽譜番号 赤本：97
ミクタムワーシップソング/マジェスティ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bfc76ab6b4026c919a226c9211bff66362a2a002d853aa067a0cc09351df70d. Chain 2 (Bitcoin): anchored in block 960306 (2026-07-30T20:23:53Z), 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/JPS801856092.
ミクタムワーシップソング/ハレルヤ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23add74a49038887b0d6fdff1a84a38ef611867c3cc5786aff7ca7bce5e5fce1. 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/JPS801856073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef8b3c5f1ec8e2e01b315a374058caaf9a89d35306653151513227ea7a36478. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/JPS801856077.
イエス、あなたの名は - 楽譜番号 赤本：108
ミクタムワーシップソング/インマヌエル
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb95d04421660fe17114ba689a0f4d1bd656fadcc3b58be455a2bf0f58e341d65. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/JPS801856128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3264435aedaa60b22d452fab8172bab8764c17c8e81b6a581f292821a1bd08c5. 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/JPS801856130.
あなただけがわれらの神 - 楽譜番号 赤本：112
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e6ce01b418f4036ab051ed00607915a11af7061eb1ecf4ed39291bb68095d2. 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/JPS801856132.
ミクタムワーシップソング/アイ･ワーシップ･ユー
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x868dc7a88467025b469df0e6b61a36b807cfe1d5bf22068c8e22cadd57e1bbec. 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/JPS801856012.