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 0x5e9c345b22dad74caaa35432af1e8d58e480d6a0a8bc3f64f865bb23379acdb6. Chain 2 (Bitcoin): anchored in block 953730 (2026-06-15T02:47:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9491418a-0269-4eea-a9c4-0a01ffa7ce09.json and https://artists.proofprofile.net/proofs/artist/9491418a-0269-4eea-a9c4-0a01ffa7ce09.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Lady Macbeth of Mtsensk District / Act 3: Sláva suprúgam - ... - Cto takóye?
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 0xd585652b2da12b7f8003d2125d23e3d9b44fa552dbb13c667077536302cda940. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF059231222 — a six-check JSON result.
Lady Macbeth of Mtsensk District / Act 3: Sózdan policéyskiy - ... - Skóro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bfb703dedd9947681249de38d2ef20d1c0db1304552c18e3b6d3d98fe960a66. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF059231220 — a six-check JSON result.
Khovanshchina, Act I: Ej! Ej ty! strocilo!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87620bac1a0ba9c3037d711fcf165e724df7f6a16f60f427196237881c678e43. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF058931205 — a six-check JSON result.
Khovanshchina, Act I: Aj! Prjamaja pogibel - A my zivem nyne v pochoronkach - Da cto ty strascaes'?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3dfe631a6d9954ad64759155edd2d31c93393256a235549bec6a13b25d6fec. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF058931206 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71cc7de3c574c266c1f461e55e259d56328d2c7af753b72d681e9faeb23df81. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF058931218 — a six-check JSON result.
Khovanshchina, Act III: Spit streleckoe gnezdo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27cd101fdc4ccd5ac03a1cf7539cdc56d53db0364d4fdaa7d74d15037cfbd1c8. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF058931221 — a six-check JSON result.
Khovanshchina, Act III: Podnimajsja, molodcy!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4f8fb4f27cc90a4cd8473ec56b66afca73bdf7f4a59772d546966b7c085dd5. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF058931222 — a six-check JSON result.
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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN960130101 — a six-check JSON result.
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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN960130102 — a six-check JSON result.
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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN960130103 — a six-check JSON result.
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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN960130106 — a six-check JSON result.
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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN960130107 — a six-check JSON result.
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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN960130109 — a six-check JSON result.
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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN960130110 — a six-check JSON result.
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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN960130112 — a six-check JSON result.
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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN960130119 — a six-check JSON result.