Fumika (written: 史華, 史佳, 史加, 文香, 富美加 or ふみか in hiragana) is a feminine Japanese given name. Notable people with the name include: , Japanese actress and model , Japanese volleyball player , Japanese
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 0xe6f534ae1d1612e1ad3109bade0d4a69afa1c26ab3fa46ca53ad1de005146f37. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cd3a2439-064e-49ec-89ec-cfe52690b09f.json and https://artists.proofprofile.net/proofs/artist/cd3a2439-064e-49ec-89ec-cfe52690b09f.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 0x82cacd26c15eccbadab90ea1ea65adb269861e87dd7f4ffa2b21b3ff366d2038. 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/JPBV01121581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c086985fdfd0c880cffe320bc5b1f3fa1b27dd8ed7dd726627b2cc7e846cf7c. 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/JPBV01221822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3babb826af8fdc04ea2f21b35eed349a21227f60c608b8175773a91fe84792. 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/JPBV01221821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a3a92abcf9f032de2c34ecb5e9f8d10797069261f6bf788a9c1451846586301. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/JPN001400468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e96ddea7b9b9440dac44d6a4b7a840ca32c4895b2a8917fef8c367099ddd225. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/JPN001400295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x357fa15fa708e5e05f0c5c724000f78758c76f7e791a8fae35d5c4ce408c4d7c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/JPN001400470.
無理かもって思ったら それより先に進めない
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb6a22827bd6feae7dc3a504c5efa99b9a9aec511f881498efdf988163c417e. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/JPN001700092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f32252e401d5791499ea8f574f5b15197d60fddaa46c9cd2017eb0f8f8128ef. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/JPN001800338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac27214de7a57e4c26b8f084c5891d4b5f3851f0ae60799e5c93abceca2f9d96. 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/JPN002200042.
single flower (feat. PM7:30) [band arrangement ver.]
heart made of paper (feat. Otozatoke) [music-box arrange ver.]
How to make tomorrow (feat. PM7:30) [brighter ver.]
I saw the sky after a long time (feat. Otozatoke) [another-day ver.]