Meiko may refer to: Meiko (given name) Meiko (singer) (born 1982), American singer-songwriter Meiko (album), her self-titled album Meikō Line, Nagoya Municipal Subway, Japan Meiko Nishi Ohashi r
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 0xf9e1f0c6dd4081e8809c28556786a3dce64071ec76e6da13ff3cc64cf2a8d3bf. 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/0a5bf4e5-3d14-435b-ac0d-c87759255fc4.json and https://artists.proofprofile.net/proofs/artist/0a5bf4e5-3d14-435b-ac0d-c87759255fc4.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 0xca56b53aa6ca0139c3f92d08e9e02c45f127dae002e33469ff582b3faabb7fc4. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/JP92Q2400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ddc13bb28202af6cd95a84e7c57827f3454dace74d7ce505e30af6e6ec429d2. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/JP92Q2301650.
初音ミクシンフォニー〜Miku Symphony 2019 オーケストラ ライブ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8abd33559d8521b37841229a396bba435fdd7cd9de6632b3078ac613edf45a1. 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/JPWP01971257.
たいせつなこと (feat. 初音ミク、鏡音リン、鏡音レン、巡音ルカ、KAITO、MEIKO & 重音テト) - LIVE
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf527d1a0f59fbf218941114bdecf960ea08bdbe60e1282a2d474711e1c07b418. 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/JPWP01971264.
卑怯戦隊うろたんだー (feat. KAITO、MEIKO & 初音ミク) - LIVE
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3acfd8a108c9b226d98102184623b9cac80c2e02192e53bb5a92c664afd37a. 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/JPWP01971267.
卑怯戦隊うろたんだー (feat. KAITO、MEIKO & 初音ミク) - Live
初音ミクシンフォニー～Miku Symphony 2018-2019 オーケストラ ライブ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x267ca002ed675ba1611e64c9d81705e916ff6203519bd94af804a7b6b6439326. 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/JPWP01970220.
たいせつなこと (feat. 初音ミク、鏡音リン、鏡音レン、巡音ルカ、KAITO、MEIKO & 重音テト) - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3724fa23020120ddef256a903aaffd126cd83b0ca14e56dc837fdb1d4fe38a0e. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/JPWP01970222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b7db65e078cc12e8cc8955a32005bc5fae70c456c580141ef2b75520a10b8c. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/JP92Q2200600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaefbc37b125dc4022aea01a87c84e8e19b70eb0119278acfba0b5f7d01cdf95. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/JP92Q2301991.
夜明けのファンファーレ (feat. 初音ミク&鏡音リン&鏡音レン&巡音ルカ&MEIKO&KAITO)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c803ab6f6d0917af482bab05bcc04bb5179e8ea801048d55e40f1007b8e6e9. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/JP92Q2302003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aab578eff5b7c018983e081d5f2838e10ee0583a81964b093961415e7281e29. 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/JP92Q2200790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd900685a9c8aca0aaa485dafc56aa59208975a8c28e0bbeed33ca75baff7de81. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/JP92Q2401125.
Project SEKAI UNIT IMAGE ALBUM セカイノオト vol.1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a1e528b4064e621b92d6519ea011c2ac49b6541c21beb20aaa00349d1f80817. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/JPX302355380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3720d0aa80a17ad6911f42c8b7bd3de85a088d682f7aecf04a99aad91fc6ef7. 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/JP92Q2401202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13416dda06d9cb9dd7ef06b65c6c3bce89c77c8a108f328c4a81f751f0e4f014. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/JPP302200701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c563e138c57fa455d8fd8dc06fd295e4115ef8da3ed23371cc738eeee4f426. 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/JPE561905896.
星空クロノグラフ-初音ミク「マジカルミライ 2021」Live- (feat. MEIKO)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b684d7030b2db7dcb907dcf2a008c3dd056ef333c953011c30566908cce8d2. 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/JP92Q2301547.
on the rocks-初音ミク「マジカルミライ 2021」Live- (feat. MEIKO&KAITO)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f805956869190da046d74e03fae53f8746670e23910635d59d8cffcce10dc7b. 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/JP92Q2301553.