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 0x2d7dc3ddeb940d88377d5cfa76beaee31ffcfc008206354d64a81311de0a5003. 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/4355f135-b40d-4e76-9340-f41e55531b20.json and https://artists.proofprofile.net/proofs/artist/4355f135-b40d-4e76-9340-f41e55531b20.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
NieR Re[in]carnation Original Soundtrack
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 0xbaed47ba9ca0f31911cb1329678e0f432f4ab5f97b3ae5c2f6d4baf74e141eac. 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/JPA842100083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7180653c30651ddc7eb57eb50f709e74c1323251bd28362c79bf9f0b0492fc24. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/JPA842100086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1178fc4f9d622548dcb0955e3ddc4faae8d0fa6ca16f46a5a159ca72ec88544. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/JPA842100090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf48da957db893c229315fd43a1efd142fba00437ef0349c98ab71480cd5f19. 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/JPA842100091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5acd91d0592ee387fc2dac17d99a46b44afb30481486e5aa96d3331e7aede3f6. 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/JPA842100094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51d9316a9fa3b2bc4cf102ccbde15efcb68f7ab83ce6ac2b8600fb40f88bf6cf. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/JPA842100077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ba70cc3d6fa135eb19843a4bdaa4ee5014b6a1717edeea470b3289cf7b3d5c. 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/JPA842100078.
SINoALICE ーシノアリスー Original Soundtrack (Vol.2)
NieR Re[in]carnation Chill Out Arrangement Tracks
Tōriame (Fleeting Shower) - Arranged by Yukihiro Atsumi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b2439ec813c3c862a593d0d593c768e7879af866e1010bfa76fe0836aca77b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/JPA842200314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1817915ce816eadf11c503020d3f1c9a28cf08f64ba39bec76c9c8fb59294a7e. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/JPA842200315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985a11375981355007c5d57cbc176e69b87ba017e5146ee0ed2690d265cd3cd3. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/JPA842200316.
Gōgan (Arrogance) - Arranged by Christian Gulino
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4a6d38bfe000f9b26ac410141941722608bbd8b13a5561443c4fdef3b0067a. 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/JPA842200317.
Shinpan (Judgment) - Arranged by Shun Ishiwaka
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b27cb389962d58a67fb42c2726a7f79dee2511bda32278b3e5db4107cf59c1d. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/JPA842200318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb5e1e8c0abf5b66083ef4473864307a5cf8d551933d8b4dfb65765fa88f0b8. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/JPA842200320.
Sabigoe (Dignified Voice) - Arranged by Sapphire Slows
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95add314f12d78b142270921045a9ac59cefaf559f221fc284583ffef60cdadf. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPA842200321.
Aun (Breathe) - Arranged by yuki kawamura
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6c33cc050376d1023263bf8a6c0698bf9d6d71eaa0a20bffb65fcbbb796934. 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/JPA842200322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3514995f389acfceff34685492cce2a462170907aaf433df97303447cf8043a. 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/JPA842301437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cbbf2d60f6b9fb79a32fe1efe835a852fb0718bbbad426407192fee9a717978. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/JPA842302847.
SINoALICE ーシノアリスー Original Soundtrack (Vol.3)
City Ruins - Rays of Light - Mellow Minstrel Mix Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e792430270415c3905376acee6a952525e66154d06fd3681a32c84c5c846d01. 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/JPA842302798.
Peaceful Sleep - Mellow Minstrel Mix Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb54df0cade021121428e09ea74c42590a9b4695fbbb595fb082b9d96a1c24f. 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/JPA842302809.
End of the Unknown - Airship Cruise Beats Version
SQUARE ENIX (Airship Cruise Beats Vol.3)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d4c819a3ddefe00e6cf8b7f60c9f5ed084a92c4f14a52f7899ea617faf65d8. 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/JPA842302814.
Birth of a Wish - Airship Cruise Beats Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ef8cde655452f73a58c7b1b547ab2415f8ae6e1f69740a2ba27d34a5eaf5c8. 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/JPA842302823.