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 0xbf763dda248f0bfd11b9e82a1eda792080cf0f979ef0e4485889ea0343812678. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bbbc4f1e-8e43-4c53-8d4c-8243a497785c.json and https://artists.proofprofile.net/proofs/artist/bbbc4f1e-8e43-4c53-8d4c-8243a497785c.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 0x92ad78bd60f4135feeb12835b40848e8c22e50f700d2c0f03774dbfbfd59460e. 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/DEN960130101.
Falstaff, Act I: Sei polli, sei scellini
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c81a0bb4e75d153030d014ebff061543f13cfa9759cd5fb0ed9e3787f8e70f. 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/DEN960130102.
Falstaff, Act I: Ma è tempo d'assottigliar l'ingegno - Ehi! Paggio!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291464efa53a81923c5362a946eaf56a550af4ca8fa2c205c8fa17caf6351e0a. 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/DEN960130103.
Falstaff, Act I: Fulgida Alice! Amor t'offro - Quell'otre! quel tino! - È un ribaldo, un furbo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573631d9dc3ba6da801c8097d78c9959e69d3a05e34541de291a5caad5d74fff. 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/DEN960130106.
Falstaff, Act I: In due parole: l'enorme Falstaff vuole
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a2896e9ba68a1c86ad7302a4cdb37f1f53aec4a368643c75d2987518f577b7. 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/DEN960130107.
Falstaff, Act I: Udrai quanta egli sfoggia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0001e83b35ee8514c750f02258af69f3d14083d69a22c0170e913d35e438fc14. 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/DEN960130109.
Falstaff, Act II: Siam pentiti e contriti - Reverenza!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ddf3c1791feb2f3aeb10980562c2130f1d1d357f03e486a7f7ddc68baa67b96. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/DEN960130110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0a29c002972fa7ecd412dc5894aff8e7525e54b74ef96704460665686d3651. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/DEN960130111.
Falstaff, Act II: Signore, v'assista il cielo!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab03938e47947277f2fb7f15a7c63893179d0ef34f74212ff025e8034d7e2a6. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/DEN960130112.
Falstaff, Act II: Mia signora! C'è Mistress Meg
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f1e2e046a6d7a7fed3a5bbf83ba44da41f76bd9be2df7ae89e6a054a69b5e2. 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/DEN960130119.
Falstaff, Act II: Vien qua ... Che chiasso! - Al ladro!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21557fa806d363d0e1bc05343f099d3f28ff21770366ce32639993b3c684f38. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/DEN960130120.
Falstaff, Act II: C'è. C'è. Se t'agguanto! Se ti piglio!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0a365b4346cee40327c7a0d04b7b5b6dd44b9072f483358a4c02b7380b898ed. 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/DEN960130121.
Falstaff, Act III: Alto là ... Chi va là? - Pizzica, pizzica
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07cdcb200a099874ded73ac0886ef000637d9ed48cc263d97070b8560756644. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/DEN960130128.
Falstaff, Act III: Ogni sorta di gente dozzinale
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0dc510b9248154818d8d9fc8cd003420624a3db89ee7db781b25a84a332ca47. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/DEN960130129.
Falstaff, Act III: Facciamo il parentado - FInale. Tutto nel mondo è burla
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73443b7f7cdbaa6a7f9c720d3f2611f6439117636f86c139d99f1efe38d83181. 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/DEN960130133.