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 0x40320ace271d219db183c79061496f0decc56dccae60c4cefdf07d448e2e5bb5. 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/3323adf1-934e-4863-a7b4-e14c6979fff3.json and https://artists.proofprofile.net/proofs/artist/3323adf1-934e-4863-a7b4-e14c6979fff3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Demetrio e Polibio / Act I / Scene 2: "Pien di contento in seno"
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 0x76bd0827f989cbffc090c4affafd50f3fc15671748f99b0294310782a11bbd9b. 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/DEN961531401.
Semiramide / Act I / Scene 2: "Ah, quel giorno ognor rammento"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725dc0e34826d6351d6576388be909eab6a979ab270934b11fe9a2c9fd1cd6a8. 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/DEN961531414.
Siroe, Re di Persia - Dresden Version, 1763 / Act 1: "O placido il mare lusinghi la sponda"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5054254aa08d998a1e02051cfb4194e8afb609a90fc4d0b871c3a85d478a0dac. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBF071440606.
Siroe, Re di Persia - Dresden Version, 1763 / Act 1: "Contente non siete d’un povero core"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df162a8d248b98d8222625edc948168c1666fd5a4b2977b90783d9666d3fa63. 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/GBF071440608.
Siroe, Re di Persia - Dresden Version, 1763 / Act 2: "Mi lagnerò tacendo"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee33514c417761a7f952b69f525e850c775cb7269c944a45b0adb4c5708acc64. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBF071440614.
Siroe, Re di Persia - Dresden Version, 1763 / Act 3: "Di tuo amor, mio cor è indegno"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad8a0c26e64742d81466c4fa5acf561aeb1f9c6d641dd5b4698006d99428042. 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/GBF071440645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa42db898e06f12c010cc53a12a9934d2e5bb94ff63d66ffa6d4c7dc16b1e9f. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/GBF071405600.
Ifigenia in Aulide: "O di spietati numi più spietato ministro! …Tu, spietato, non farai cader vittima"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86cd641137fb8415dca8078109b0fb269d2e6dc30d7c73b3a4fd518a4bd61948. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/GBF071405610.
Penelope / Act 2: "A questa bianca mano"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec6ee150576a1afa265f6ec5109d45d1a7c85aa5ec1eeb9ffd62a2696c581162. 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/GBF071405620.
Serse, HWV 40 / Act 3: "Crude furie degl' orridi abissi"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab32818b10c3ad4f8455f465fee6e89fee7784b53a3ce07c849e4d0b8ae7e306. 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/GBF071405630.
Farnace / Act 1: "Ti parli in seno amore"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffae8d3e61815adaa6ae618605dce779ea03733b8e44846779efa9ebb5d450e0. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBF071405640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed71c67f856e55b68bf37948396c7cee115986d6cab36dbc3da67a967f8d60f3. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/GBF071405670.
Agrippina, HWV 6 / Act 2: "Otton, Otton...Voi che udite il mio lamento"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0be7669b71be9986d7d409637a7010dcc6f6e083f24fa1d254c05a3f75fc96. 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/GBF071405680.
Piramo e Tisbe - Intermezzo tragico / 1. Act: "Ah, non è ver, ben mio"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3cc40537e67c60ef2f228f139f30afb97224adb145474f8848eedd2e0b9cb4. 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/GBF071405700.