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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c61139ecca4e76cbed6cfd4ac0044141a310872375da9f25f5b1aa524d98d6. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d4f61f77-5986-4009-9ad8-423db4c844f5.json and https://artists.proofprofile.net/proofs/artist/d4f61f77-5986-4009-9ad8-423db4c844f5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Schneewittchen (Deutscher Original Film-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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x683c425f51025eea731e1525213eece2dc52a3ef480b233b90c03d357b446f05. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QMRB31800029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79421a4e6dd495fce3cb70a20aa07bd7710141cac04886cba59ef9c5ff070c36. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMBZ92080081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0fb7ed51ad22c506bb650f82ea5c9ce56c73bd22e41ad76e416c5a5aedfcbfa. 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/QMBZ92080083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd93bd490a7653b5a013ca245dfb98471f0172737da02a9b7e1eb7c9e79e029ec. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USQX91800334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193cc75336d75fbf926539dbf35a815ae81c36e6cb59aba6a79d9dbf875cb1ee. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USQX91800568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd93bd490a7653b5a013ca245dfb98471f0172737da02a9b7e1eb7c9e79e029ec. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USQX91800334.
A Million Dreams - From "The Greatest Showman"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9aa1415932287e356c876e71514c8700f1abf4538abb6eb5c8537a34d97bb8. 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/UKVLS1900011.
So Big/So Small - From "Dear Evan Hansen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195358ec95567f2359ceb0afa3b8acab3776bfc7efef3c77bfc0944c09a7dedb. 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/GBBBA1800217.
A Million Dreams (From "The Greatest Showman")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49926a41d1dc7ed53d0a50fa6f5ebb6a73deea10abdeebb6799a28c3b2d90783. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMRB31900052.
The Battery's Down (Season 2 / Music from the Hit Series)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c352bff2ec7460da41e1057ed238eff523d096c497cca76d7a1903f0efffbc. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USSK31051519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12755f773671c60ebe2eb3913e1a0c6d54110fb7c2458f36143990d57ce9ffd. 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/USHM81961322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce4f2fb8231095f64e7c8d0a0b555575807ee3b3c8d8d6ab8f682a7a53c86ee7. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/FR9W12126542.
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
HATS MUSIC COLLECTION～Cover Songs from Movies
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85c59ac9820acaaa34195ec175463e8aa599bd886049b4fc4c4f6400899c714. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPS101700078.