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 0x3d55a5d003cc54bfe2a21e5c6881299d20f2cc034f91fa2b7d1f28489f585993. 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/bf9f3a8c-a1be-49b2-921e-99469a6f9ccc.json and https://artists.proofprofile.net/proofs/artist/bf9f3a8c-a1be-49b2-921e-99469a6f9ccc.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 0xa5994b33115834f2cb847ab79237609ee7017674cffb188d291e592fdc80b18f. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/US83Z1767284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd68db0728ecb85a8f6cc1a8069f72ed57cfb8f8edd3d97d4fb953976497f589. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/JPE561702934.
Snowfall in November - the Remixes, Pt. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449d317934ba76ecec29cf954b3a766a7a952b028bca876b554e6e2963e92cd3. 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/JPE561703991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a05f8483bbe49f06a1cf003a47ee7956e40dcc27a5e0a3bead4ef2c8be09667. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPE561804945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47db37d3c148fbc8a0091f3408d0b54084ea5e3f3aa132db4ef7a71992d6c813. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/JPE561804946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d6ea691f3a11e96d46c32b9072488d23cd675a3cc55e8e53e132bf8ebfd6945. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:07:07Z), 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/JPE561905785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa25b937e24d3fbc1bea1d6722892f36305eaabcf4320489cfa563b5ac2980f66. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/JPE562006189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2f2c071f4ef5f94976e9f954d77a4671cfbb13b2e553e1b80061593ba7436d. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/JPE562006193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79f0ffcd493f6879048b9a163b3cb3d170789cd9dd9bfc6f533c7cd3ad7c182. 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/JP92Q2400074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x099d2c932c08477b0d764c16df0957bce4abc18f294136f5377837697885ecfd. 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/JP92Q2400075.
バックグラウンド・ミュージック (feat. 初音ミク)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d45ff5663f664a2aa3296e206bb20f1e28525a817fd23b71a4eccd98948c7f1. 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/JP92Q2400076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527f87e909f8f4cb91777ad861c490293d0e49ebddb4b9f190d4e17264fc21ad. 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/JP92Q2400077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x030de4945858a11753c5390332cae0b2ed755bda0afaaf1e273263955d502224. 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/JP92Q2400078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc26f45209af892be8d511955188f6ac65c7266b2d87c8c0607b86a5ea27852. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JP92Q2400080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee41e9968e9917118e9bf9713be47c411e38f8d66dfc3d1c8bdce5b3e71cb5a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/JP92Q2502056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b65b0f7e9aa9ba873773deb9f46d8794a3e9449691c2d86bfde0b1087a504ac. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/JP92Q2502244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d4bfa69510ff6c4bca0ffab7a407fe1a8f0f578f9837bf182b7bf5ad80ea65. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:08:19Z), 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/JP92Q2502245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x718c8f0e9fa91fee5c558213b4bf3609e7721dc363c659f74f4bb6b0a2ff245f. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JP92Q2502246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d1ed2c4e65e64a6dd1bead747d752ec330679a5c4e0077ccb6464bca8841ade. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/JP92Q2502394.
don't escape (Miku Version) (feat. 初音ミク)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0e11d26a3a195e282d9ddf8144dcc5ec5a3444c265f0fe4fe37eaf5d1c7651. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:02:27Z), 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/JP92Q2502902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb97b377d7838360a3d28d416989bbf46aadf998c58f1b2e37af2872417858196. 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/CAHQJ1984705.