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 0xda8831be4dee9da46d3aceafe34230fc0eecd6117f741bbf3f34c2ae9a8ccf85. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/71172f21-149b-488e-b7d8-a1b69430654e.json and https://artists.proofprofile.net/proofs/artist/71172f21-149b-488e-b7d8-a1b69430654e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Eugene Onegin (Act 1, Scene 2, continued): Chorus of serf maidens: Maidens, beauties
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 0xeaa03adac5e3f36e4f00a6c052d4a6b353fb50e65f5d86c3733f5a011214fa98. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USSM10404564.
Eugene Onegin (Act 1, Scene 2, continued): Tatyana: He's here...and aria of Onegin: If I should ever wish
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99de92033416f76460d7da15e86edfb17f722d6cc475f8da0df75564bc6f30be. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USSM10404565.
Eugene Onegin, Op. 24, Act II: Lensky: "Have I really deserved this..."and Couplets of Triquet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970a45fcea7281ea9281c1d9001b1e7e3992203e909f049cf4f97963276d399a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USSM10404569.
Eugene Onegin, Op. 24, Act II: Final; Lensky: "In your house!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8ad1c25a5276a2952501ef4f347d63952d69a44a8c6a7d39d37b0be6703074. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USSM10404571.
Eugene Onegin (Act 1, Scene 2, continued): Letter scene
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f092aa940a13036fe64c8f3bbd22e7fc05508c54cd670664bd09b89ab2b4d4b. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10404561.
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
Eugene Onegin (Act 1, Scene 2, continued): Duet; Tatyana: "Oh, the night has passed..."
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bbc30439a19c186a063ee62ad085c934deef6bdc5e4898ecb6645341acf282b. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10404562.
Eugene Onegin, Op. 24, Act II: Entr'acte and Waltz with chorus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0bd8f47503ab1a5b8c403d6ba0d905cebf110a9962a19cb57c452047b781397. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10404568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c2b94c25c8b7a591879fe09b1f9461f4435e7312086aeaeb17d272f7814609. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10404570.
Eugene Onegin, Op. 24, Act II: Introduction, Zaretsky: "Well, it seems..."
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d8de583456ff160bc740817de0ba0f7eae7e42c0106217a70a6dcb8bff5327. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USSM10404573.