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 0xe8a2784a9883b8cd78bbe27c0c411cc09702b092c6d3b7653a9991a620447467. Chain 2 (Bitcoin): anchored in block 954650 (2026-06-21T04:51:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d9786a19-7c68-4f80-8d18-0e7f2d377379.json and https://artists.proofprofile.net/proofs/artist/d9786a19-7c68-4f80-8d18-0e7f2d377379.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Alfredo il grande, A. 9, Act I Scene 9: Finale. Dovrei svenarti, o indegno! (Alfredo, Atkins, All) - Live
Donizetti: Alfredo il grande, A. 9 (Live)
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 0xc119d5baff916550006bb17db42d6e7464c14dd449d85c73b336c1556cfbde1b. 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/HKI192421116.
Alfredo il grande, A. 9, Act I Scene 1: Vieni, Eduardo (Amalia, Eduardo) - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x863d88426ee497eccabdd716a6f98112d8729f2a49367741084af2fe8a909e7a. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/HKI192421102.
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
Alfredo il grande, A. 9, Act I Scene 1: Su presto, alla campagna! (Chorus, Eduardo, Amalia, Guglielmo, Margherita) - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3596273e921910bcd4fd54af959f061ded17eb3eaa0da5d3ec7bd32b14d372d6. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/HKI192421103.
Alfredo il grande, A. 9, Act I Scene 5: Terzetto. Sposo! E fia ver? (Amalia, Eduardo, Alfredo) - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6229e9806a0169d5220c796e29f0912eb1340e22dfb736601f99c65eef9a075b. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/HKI192421110.
Alfredo il grande, A. 9, Act I Scene 5: Terzetto. Oh, bella speranza! (Alfredo, Amalia, Eduardo) - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c298937002fe6d2346b01dfdadbfdb6c26baf881b50d29fd424c65658f5f0e. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/HKI192421111.