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 0x3fc1fb7710dd842fa4a74d8186ec0fbe7e9a77b858be9be4ddcf0ad9507c5e1a. 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/2583d8e7-50f3-40fb-8bfd-7b0b730c82ba.json and https://artists.proofprofile.net/proofs/artist/2583d8e7-50f3-40fb-8bfd-7b0b730c82ba.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Il mito dell'opera: Pedro Lavirgen (Live)
Eine Kleine Nachtmusik, Serenade No. 13 in G Major, K. 525: IV. Rondo
映画の中のクラシック モーツァルトの映画館
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 0xfbeeb13600ee6cb716d64f5f7447c0bd058a2eba0496ff45ff494a39cee39ebb. 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/USA371407036 — a six-check JSON result.
L'elisir d'amore (The Elixir of Love), Act II: Una furtiva lagrima
Enrico Caruso, Vol. 3 (Recordings 1911-1913)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac1d47b7e68fea296801301124caead51f0890c15bf3cc33413ab09bafa97d1. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/DEG730210238 — a six-check JSON result.
Vintage Hollywood Classics, Vol. 12: Marilyn Monroe on Screen and in Studio (Recorded 1953-1960)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483d2e8fa706aa5e3639d9fcb0cd2e336a6ab682fc9230d5e59e6928e4528683. 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/DEL111400508 — a six-check JSON result.
The River of No Return (From "The River of No Return")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5c5dcb7ba6775ab14981bfd972e5b78138041cb3f28162f0b71c3be5ffaecc. 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/DEL111400513 — a six-check JSON result.
After You Get What You Want (You Don't Want It) [From "There's No Business Like Show Business"]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe22ee4d5af8101c74125c71f7bbd89e17347c5bf869cd7cf7ef07ccab2d2700. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEL111400517 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d17e4c3f3cf210e277b613a354b083bac248b24c249d0fed5cfa14fd6cfb14. 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/DEG730210240 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a86204237776fdd9aa4b069131676fde2a0ec683ecbcd24304ac97a2ee9125. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/USB8U1014760 — a six-check JSON result.
I'm Gonna File My Claim (From "The River of No Return")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36eee22b886b731b34af737cd4b41cb8e9e92bc8cc41146b4cce8e5171d8ec59. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/DEL111400512 — a six-check JSON result.
Heat Wave (From "There's No Business Like Show Business")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a4c7a3e76da9bc3e033b1af41186a3d53de85e7fd1665b227a505ebc921b036. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/DEL111400514 — a six-check JSON result.
Lazy (From "There's No Business Like Show Business")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315e35b05e05459a79f208bf60e173bd5ab77c59809a2ec82a2e7e493b8c6106. 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/DEL111400516 — a six-check JSON result.
Lo schiavo, Act II: L'importunata insistenzia … Quando nascesti ti
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d66e8749bf16d71ecb478a5d9ed83ba3d69095b2b525e5c9bc9271d9c623d19. 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/DEG730210237 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b2eb42ef303ac3702e94cbb69d37f1646ea1c0e9343aafdb45ba8379deeef4f. 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/DEG730210241 — a six-check JSON result.
A Man Chases a Girl (From "There's No Business Like Show Business")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5012ef9e68f7ffc51b372032f8c3e455bf8fa78007f621582027418faee838e3. 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/DEL111400515 — a six-check JSON result.