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 0x33f23b5c2989ced1b5090df8cc71aefaec4e86f766636489596dc28f02a0f230. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6945bea6-92a7-4c68-81c3-b3a01a983559.json and https://artists.proofprofile.net/proofs/artist/6945bea6-92a7-4c68-81c3-b3a01a983559.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
VOCAMIX 39's (Mixed by shirayuki - DJ Mix)
Hatsune Miku's Counter Attack (feat. HATSUNE MIKU) - Mixed
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 0xcdc17f4388a7261829434312b3ff9fd7b4ffdcd7db5dee5ff31d78a25c6ef7e2. Chain 2 (Bitcoin): anchored in block 960223 (2026-07-30T07:51:46Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPS532400013 — a six-check JSON result.
hyper reality show (feat. HATSUNE MIKU) - Mixed
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123611caf897a0b4eef48835c6025ba7b5dd355edc20f8b2ce16c705a4283531. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPS532400014 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c4e7194605f6581ff4089b7ac2cfa75fc3f4964ee6955d77b273ee4c4155a1. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPS532400015 — a six-check JSON result.
SHIROI YUKINO PURINSESUWA (feat. HATSUNE MIKU) - Mixed
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aea6c0be1fbcb5bb21b612d28b28a51178a55492ba75f60fa018e125955395c. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPS532400016 — a six-check JSON result.
What's up? Pop! (feat. HATSUNE MIKU) - Mixed
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8cad30336b5fa6879ac23336e1b4433599e8bfbd3d7edf95319b8242cd46cf. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPS532400017 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1751e79f2628a4871d8de19118d0610fb09bd8d5c9a2b006ced75884a40b151e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPS532400019 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81fe975d1a62587766bc0405699f5ef576d8699fb21b1fa5020fb6fdfb287c38. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPS532400021 — a six-check JSON result.
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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPS532400022 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2eb1c0cc92e373d3827fccd8303ddc728755550cccb3f20ffa00b65d174a687. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPS532400023 — a six-check JSON result.
sori!chikokushimasu! (feat. HATSUNE MIKU) - Mixed
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1947c1c5fbcaeaf3c771c8cb22581411dcf0e08609b7ae4cd5c74c47894bda8. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPS532400024 — a six-check JSON result.
MIKU'S BOUNCE XX (feat. HATSUNE MIKU) - Mixed
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb28a50e1f44ec43f2f6755e695d7d1300b1d6d2f329241e4a66025935a8ef7. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPS532400025 — a six-check JSON result.
Hands up right now (feat. HATSUNE MIKU) - Mashup Ver. - Mixed
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dadcfbc37eedba2bef83383a33cfba3079a8d66a8516265969a8a45d51fd067. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPS532400026 — a six-check JSON result.
Rave&Rave&Rave (feat. HATSUNE MIKU) - Mashup Ver. - Mixed
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975d1bb4ccf54670c87a0631b2cdcf72ca14bc4049152e3d47766e835a7e2492. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPS532400027 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa21e5e1eeadae13577725d88971c6817993c89122620b73446e66f8d28714963. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPS532400031 — a six-check JSON result.
TEIKOKU SHOUJO (feat. HATSUNE MIKU) - Mixed
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e40deecb79ffdbcb19e90cc4b5538d02e3b437920668464ceee50ad733e997. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPS532400033 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb650abffdf3c51ecf07f4c0a4a46649e6c89b43671b6b3d637dcd63a802ed4c. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPS532400034 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd19616a3de446470e8881e2b59870140377180b5aa6bd2184325e95eea41e95a. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPS532400036 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de02aa01d2bb5eb04de60df481d645de95b2555c071a112ba6d6f5cf0d79b49. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPS532400037 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31a7def2c8715e628e6ab1eecfd42c774e4fca4a664e4a65b1d8446d02c1f28. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPS532400043 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e85a3ef1f28b3c1dbbc5b8c3726f20b40d2a45246831f52e02f49cd963c6e3. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPS532400047 — a six-check JSON result.
NETOGE HAIJIN SHUPUREHIKOORU (feat. HATSUNE MIKU) - Mixed
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855e921698189be23ed7ad219773043d33f41229500ca1b95206da9a8e684cea. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPS532400048 — a six-check JSON result.
twintale wonderland - Remix Ver. - Mixed
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f47a4e85c241610f147fa6d2b3d5a3d4be68a2ee358b966b92031f54f8ae6b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPS532400049 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd050d79a6e4d61b4e8e3b5f2191f56ccf83d251e961def1291c100a84c4bf1. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPS532400051 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb3dbd4d7c17381daa06f31e84a16181b6ed47bcd10040ab876d62135837671. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPR2273307 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23997a93f5c08a68123c6022e8c1c6a6f9c5e83ad20b35a2aa990d144d52b004. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPQ2111522 — a six-check JSON result.