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 0x24ee889ec98a9fbbb3581196bc9c3c38439437f39b36030dd614841cb25970c1. 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/9a20f46b-facc-421a-a821-65c57c677a22.json and https://artists.proofprofile.net/proofs/artist/9a20f46b-facc-421a-a821-65c57c677a22.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 0x35ce1c9b23b0b647448856e56d7c937b41f440805200cf897dc90ed66212ea85. 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/JPW562003183.
MAHOROBAGRAPHIE (feat. YURiCa/花たん/709sec.)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478f6e2ef96ac4ac5669ef1fd6bd844906c115a77994479325d40924280a301c. 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/JPW561808315.
NECRO MEISTER (feat. Nana Takahashi/709sec.)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd1f492325417ace8a8cc10d07fd6beb997bf7b5390e4d5f7113b198681a504a. 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/JPW561808170.
死蝶 -Swallowtail- (feat. Nana Takahashi/709sec.)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde261cbee30c3bac0a1df88326753c5cea1681407dbbd3bd08b99cb888dc51e. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/JPW561808179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ad2bcc20f4c70658597863d1f336bf37e902b25d206a000cf8b7ea2d4c7806. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/JPW561808077.
sing for you, pray for you (feat. 709sec.)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606d824e9918a5261a8fdff5c9748627ea812afb9916d3f7f8d4770aee2ae8db. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW561808329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb1229ae1cf35d48137e544ba33a346f42fa77af7ed0d203c9f1b63ff20462b. 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/JPW561808291.
DARTH KILLER (feat. Nana Takahashi/709sec.)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0441e121402cb1c7a377bd1dabc8ba9a83b32b2d962f4ee7a7c194d34f7d3076. 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/JPW561808242.
The end of the world (feat. YURiCa/花たん/709sec.)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462467d09a3f21e84c28c0d153ace6ab84effef7f59377dd64c5f02d26ebbde2. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/JPW561808251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e737bc9b8ff5579e0f5d8db5f74440cee8d30bf898e95ae488c1a5a58bed06. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/JPW561808111.
Final Force Master (feat. Nana Takahashi/709sec.)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b75c5b764c04b7e494f95c8c3706653716319af188c5268924076f99939d38. 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/JPW561808134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x318b62c5303bd1796eea35104ee69bc5e940137689208d08d63e3e2724774da9. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/JPW561808136.
Kill The Night (feat. Nana Takahashi/709sec.)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x354f2602917f67408e636bec0a8a47f8bf5d0d1b8ff8a6048d5a83427c119b2b. 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/JPW561808122.