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 0x01b0e2591a92bd7c17149302e68fc25ecb6339fd8ef13b38fb7ede1053f6c4f0. 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/ab03bfd7-1070-48d6-8865-61f6f73a8bc4.json and https://artists.proofprofile.net/proofs/artist/ab03bfd7-1070-48d6-8865-61f6f73a8bc4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Verdi: Ernani, Act 1 Scene 10: "Vedi come il buon vegliardo" (Carlo, Riccardo, Silva, Giovanna, Iago, Elvira, Ernani, Chorus)
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 0xca3cc7f7cb1ed56baa09ca64ef29412f688961a1b8ad3563376c9661f190f440. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8200204.
Verdi: Ernani, Act 2: "Ah, morir, potessi adesso" (Ernani, Elvira, Silva, Iago)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567fe51d10fc10e80a7a8d7266f6b46b9cff1914324b2c49d8668f2ec3e153c8. 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/GBAYC8200208.
Verdi: La Traviata: Un di, felice, eterea - Act One
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c633a87fc3c2e493198161a174ca4427abe15d333deb3b71b6c7ee894c9ed68. 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/US89R0699358.
Verdi: La Traviata: Dell'invito trascorsa e gia l'ora? - Act One
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x901e27d1d62656ba03fe9e5d775b8e8c07dc932f6610e864d44fb476f1fa1467. 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/US89R0699355.
Verdi: La Traviata: Addio del passato - Act Three
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba418c7eae09ee032586d0b529fd5a1d0ec68621fd817c74cd434caa98d4924b. 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/US89R0699390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75264097f4afdfad4a71f15ed5c8d684b9c3213c6205ece3a8e698928dd1b08e. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US89R0699354.
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
Verdi: La Traviata: Libiamo ne'lieti calici - Act One
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52138e2631eb3a9726d0af87d095496bd942a93d1509531708cc00ebfaf732cb. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/US89R0699356.