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 0x77b75299d0cf49841b7441bbebd2b7a5f8c4140530cdadd5ed8276d766c4504d. Chain 2 (Bitcoin): anchored in block 953678 (2026-06-14T19:23:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6435b5e5-0601-4512-b62c-0e98af16b3e7.json and https://artists.proofprofile.net/proofs/artist/6435b5e5-0601-4512-b62c-0e98af16b3e7.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 0x689f25279b18df5a36d48871b4df56389bac6ceebe085860aa7b6dbe9238523c. 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/JPVI02402777.
Kare ga erande kureta megane (feat. Meow Harada)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689f25279b18df5a36d48871b4df56389bac6ceebe085860aa7b6dbe9238523c. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/JPVI02402777.
Omae ga warauna (feat. Pompa's Homework)
Kimi hodo no hito wa inai (feat. Ore Tomoda)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c7f7ec9a87e0b8cbe5567a6a8cc35a6f0f32cc91d227e7a3d6af6388f4f606. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/JPVI02402971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c7f7ec9a87e0b8cbe5567a6a8cc35a6f0f32cc91d227e7a3d6af6388f4f606. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/JPVI02402971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd34ded5c62a171639c263418e38622c965e60a2eee1ac1b5bab6e6e7e5e00b. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/JPVI02403067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd34ded5c62a171639c263418e38622c965e60a2eee1ac1b5bab6e6e7e5e00b. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/JPVI02403067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910b60ffe40c8247adb6806cd379b8273e8e13e18f54e95867de06ce13fa9353. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/JPVI02403153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689f25279b18df5a36d48871b4df56389bac6ceebe085860aa7b6dbe9238523c. 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/JPVI02402777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c7f7ec9a87e0b8cbe5567a6a8cc35a6f0f32cc91d227e7a3d6af6388f4f606. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/JPVI02402971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd34ded5c62a171639c263418e38622c965e60a2eee1ac1b5bab6e6e7e5e00b. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/JPVI02403067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f11e59906300626c9b942432f327452a2c4d703fd628e084cc3cf754fc6286. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/JPVI02403185.