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 0xfc9f2893cafa7e2a88a6a5c23a2314189be4203409e859baa07da16de49f889d. 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/298c0854-62ec-4d2a-969b-082ef2ab7e4d.json and https://artists.proofprofile.net/proofs/artist/298c0854-62ec-4d2a-969b-082ef2ab7e4d.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 0x693deb343c907d1aac0c656c55549e8c0bdd3a7a22f05ac20519bb138f162951. 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/JPM801300126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x607fbf68d03005758a0612c236629c0b2a25cbcae51014c7c134847934e26140. 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/JPM801300123.
ガールズフレンドシップ feat. 初音ミク & 巡音ルカ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x800d91c77816f1690013de9a0e58d3308218de3ac8783209fff74669476716ad. 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/JPM801900075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6412a770b18ffa65309a470078d670a3227eb2203864b084525d7c441b1b34f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JPM801900070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7135abccfd348346b835aca837ed64fe9ea6b26bd8af560b260cb183c0f11466. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/JPM801900072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1180c25930a6c2a2af8e21b96975fa6904303cd52943429712a8e5be1a704f0f. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/JPM801900074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x800d91c77816f1690013de9a0e58d3308218de3ac8783209fff74669476716ad. 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/JPM801900075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d4dcccbee81682caf0b26ad30cd32876b39e085444a5d96d7245f6a158c4b4f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JPM801900076.
ガールズフレンドシップ [Symphony ver.] feat. 初音ミク & 巡音ルカ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763ef3033691fa576cdbd4bad9904f83ee44fb685b2422afe05f141ea4ab5cb4. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/JPM801900078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d97689dcc54610460ba4e4fb16e266a74a495e7010f1a4687f1e9ebbfb8a15c. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/JPG532002148.
Newly Edgy Idols (feat. Hatsune Miku, Kagamine Rin, Megurine Luka, Meiko)
好き！雪！本気マジック (feat. 初音ミク) [OSTER projectが本気でアレンジ！]
好き！雪！本気マジック (feat. 初音ミク) - OSTER projectが本気でアレンジ！
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85316a3d81abe67e362a27c18205fa344b27771c1cee345dae80ec19d6b0b139. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/JPG532102366.
Love! Snow! Really Magic (OSTER project Remix)
Cause We Are Princesses (feat. Hatsune Miku, Kagamine Rin, Megurine Luka)
だってプリンセスだもん！ (feat. 初音ミク, 鏡音リン, 巡音ルカ)
VOCAMIX 39's (Mixed by shirayuki - DJ Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0abc9de08c612e6c0b5fa7889f468f09afce18bcfb4aa89017a7246dea8c2b05. 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/JPS532400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d226ccddb18af949ad75b18156bd37c35dd328a17525601eba20f872d6830a. 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/JP92Q2302041.
Exit Tunes Presents Entrance Dream Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb531f1a27ba025d6291c8a927c73046bb17ab9b1a7ca05e7f66d65c0e641c022. 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/JPC231500681.