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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d4baf81aa60ce9904ee9136c6fc29a3e49d752f8e6236bd1ed8d9b6aa9f77db. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b24c5c8e-6a46-4381-9ad1-6af04df6d609.json and https://artists.proofprofile.net/proofs/artist/b24c5c8e-6a46-4381-9ad1-6af04df6d609.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ecd6a45e28b4129e1b5f09afd57cbb7df9f240ef4e5bd771182839f444dad9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPU961900097.
Sharing the World (feat. Hatsune Miku) [Album ver.]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549dd2fe2dd1480333499d7983a927b7d33aba10d8867aa8b690d501891925e3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/JPU961600016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a9b7666828d04b22dcc355bd0cafb185ef834c2d028b641d10c3fef381dca71. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JPU961600037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb22851d6143bfc45aef728c9fd030140227865a88d6871c502074882ec9fd1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPU961600041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7750438a5dfae038332bdf45eb6f87042aafae67dfa524ce414bc35b9e75b7c1. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/JPU961600036.
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 0x46bdc0b97359f0abf79e697f3b3cff29a1f5430a748712845b05f731213d2166. 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/JPU961600038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28abd2a0b7f2d39126e79b17b78ac4ef5232cf018fe1f8e8a52c26881869db47. 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/JPU961600039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc24fba48bccd97fd5db1b5ea8035ad2db3a4b0b56d7d48fe5553523645a209e2. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/JPU961600045.
Stay With You (Japanese.ver ) [feat. Hatsune Miku]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc2c6ac1312d729a99e34cfe27b92c67f33ba7cda7dbc0fef0aa5059c130bfd. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/JPU961600048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaeab88a189a714952022bb762aba181663bfca096118c8afbf5520003617b56. 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/JPU961600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc106c0503025d9f8d15780251adb0e4c3f7acedcea3d13d55f07a8a84fbef4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPU961600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x913575b87dc9ef75a82f5202c427be73473f99f931d00e961b2ee5cc9371b4c5. 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/JPU961600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c546f1b3ebc5145cf7af09dacbb72f8fbeb8ce2a367e35bf3d1dea01d6aebd3. 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/JPU961600010.
When You Look at Me (feat. Hatsune Miku) [Album ver.]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2a2020a2b849b272fe53b02237f3debbdc17e9c45ad33bc3bc560d227a2eb4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPU961600014.
DISTANCE (feat. Hatsune Miku)[Album ver.]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5672fd2884c6e6604680a7c305e577db67abcb043825435ef6d8c3acf008ad95. 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/JPU961600001.
Gallop Through the World (feat. Hatsune Miku)[Album ver.]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf893469d662ed7c805bacf07aaf4b414ce11b4dc169a484d0fe7e2f707c020. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/JPU961600003.
your voice (feat. Hatsune Miku) [Album ver.]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f44a9e48ff075f49503e50e42308577b0c08b2d1f71921296bb0ec44138909. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/JPU961600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd1fbc56db17a1c8d608defc9be016751094a1bc30d520cde3549f4811104d66. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/JPU961600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4e902f12e7a41eb09abc7b94e0be40f201458d1e1d7d4a7815e1085f6c6a48. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/JPU961600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2001a905f4d5aaf32d31f269404042eb1233f5829a0d7334eecc8cc0957599a. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/JPU961600012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x283cca1f22be2790d2ab4fe74af5e6fcb2fe801050cea47da49e6d7402d9ab7f. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/JPU961600013.
DUAL RECTIFIRE xxx (feat. MARE SAKURAGI)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x288a513b957de55eebcd29cde1a1d2c1c424e4736b7637da6feb02b93e4df25f. 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/JPU962000133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9d0ec774c8df86a5909420219b4c369ffaafdaa2ac759d36e2ac961c91e650. 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/JPU962000093.
Ordeal feat. Kagamine Rin & Kagamine Len
WHEN YOU LOOK AT ME (feat. Hatsune Miku)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5bb8e5caefe0f0f2ab176326108f901ad58fa8a150465caf5eb5ab245333c10. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/JPZ921602436.