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 0xf850120748dedfa44c26cf2b40cf9a36ac3d36adee49843ce2fbd440ef27d913. 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/a2d54e9a-865e-4ff0-9f87-781c4c64026a.json and https://artists.proofprofile.net/proofs/artist/a2d54e9a-865e-4ff0-9f87-781c4c64026a.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 0x53df3eaf61dc7609a8cd201a4ee4b67fa438650ff876797b7676a48b74608819. 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/JPB600951501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a8b10d22d56d79c1127b6a235130c7b3ce312a80453abe831a9274f5a20338. 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/JPB600957301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x128dfcf066da8ad76b927c39783edc6d456e4307ee2b538d7195a92700630f97. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/JPB600957303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6873f787f04e426750bdc0b542a41227c84974819f2c03584c8244bc83d0fd70. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/JPB600967902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49752e1845176e349149e0e387ab2716002c2ed0d47a1e08027a9a319f42c337. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPB600968201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f558698b1627f209fd25bd95769b57758afb3f375437125c0825482ef17b61. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPB600968301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b3d609797ca32673ea7280885a0c77374e1aafd913921d2b52476a17982fbf. 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/JPB600968401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a36e7bfd2839dbd7ad6d0526e90e02c7fd06efc44f87fd417feb0e381cc6ab. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPB601017001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26076d76e8f67eda0f870a3c70c03dd522afedf02e45d25d815cb0b0127b1182. 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/JPB601007601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x052df6215d1bbb962f10b0666a168eb575c368c41c79abb7da9b8dfa7c014a55. 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/JPB601022401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd3a633be90e0737dc1e037b7216b7d545519e81f122c395a9fa64d7d4ed5d47. 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/JPB601042901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaee36a88046c27f7c6e9c6e36a4cb46b2d118f8b64a032264bbe53e39d54fa4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/JPB601049201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c616a85222beca406c5a01db1ed7a53698c8daf837eb0910c0f2c79da2d87a4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPB601049202.
仮面ライダーダブル アクセルテーマソング Leave all Behind
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a36e7bfd2839dbd7ad6d0526e90e02c7fd06efc44f87fd417feb0e381cc6ab. 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/JPB601017001.
Vシネクスト『仮面ライダージオウ NEXT TIME ゲイツ、マジェスティ』 記念コンピレーションアルバム〜KAIXA,DIEND,ACCEL,BIRTH,GEIZ〜
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a14514c96e6d6879884607304efc9b40c555a0cb25087498cde64fe7c6d517. 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/JPB600944401.