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 0x3e994d2400b0bea71fe44a4c426fcb719b9fd7bd6c4a49f51f00bfdde88d258c. Chain 2 (Bitcoin): anchored in block 954638 (2026-06-21T03:45:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d461c132-2a37-4255-90c4-045de8db39e6.json and https://artists.proofprofile.net/proofs/artist/d461c132-2a37-4255-90c4-045de8db39e6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
La serva padrona: Intermezzo I: Introduction: Aspettare e non venire (Uberto)
Pergolesi: La Serva Padrona & Salve Regina
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 0x127b57032dcc2bf8f5449a8d63dfb61fafa0c7fdb6e1a15eb5e5b1eb11fb5cfc. 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/ITD551059801.
La serva padrona: Intermezzo I: Aria: Sempre in contrasti con te si sta (Uberto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebbeee4608292f4acde4d2fd068356a8b3d55bc71b8695f2a633a0facdff92c0. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITD551059803.
La serva padrona: Intermezzo I: Recitative: In somma delle somme, per attendere al vostro bene (Serpina, Uberto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb226feeebc10e875aa3a53267192e8d2dc8fe8de4ec6affc43728e87b54eb44. 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/ITD551059804.
La serva padrona: Intermezzo I: Duet: Lo conosco, a quegli occhietti (Serpina, Uberto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63078bea15f7a1125f3dbf9e2722a20fdf47db63f28e617272edd7a8ea9599ed. 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/ITD551059807.
La serva padrona: Intermezzo II: Recitative: Ah! quanto mi sa male di tal risoluzione (Uberto, Serpina)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8469cb4f4cc3da577e84343ff867c03e2a82ef854be4eefef61532017df07c3. 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/ITD551059810.
La serva padrona: Intermezzo II: Aria: Son imbrogliato io gia (Uberto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8134b368dcc7ad1a717d7ad8e9fd87d8eb20d5d34c54063fa10578fe2ae840. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/ITD551059811.