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 0x5a2d1a615abe57a7498a5584c30276778d67e4629174750d4a3af16b3fecd0d2. 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/73b4f964-dc3e-489b-bd17-d96be2268488.json and https://artists.proofprofile.net/proofs/artist/73b4f964-dc3e-489b-bd17-d96be2268488.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x6fc08403f77631bfccffc2b4b9f93f1f81593c3341f82c526e9a8cdd90ec791a. 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/GBF071603130.
Ifigenia in Aulide / Act 1: "Sforzero d'avverso mare"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9252f1c56b5251edc16ba3e17131b40d1309da1f926a42b8e2cc63cee42c618f. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/GBF071603140.
Coriolano / Act 2: "Senza di te, mio bene"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x429606b4c92dfe124c563320f2e4f524c282dd995859110786804e1ee885e0ac. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/GBF071603150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb8b6b90ead37c8dfe52751daa0d040911caf497cd4bae5caf4fcae79681ca7. 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/GBF071603160.
Silla / Act 3: "Parmi, ah no! Pur troppo, o Dio!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x747331e09f86ef40a61826fc09e32dd9502afa6d4e5e3e266229490888fde87f. 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/GBF071603180.
Rodelinda, regina de' langobardi: Sinfonia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2167ca24d48db4530dd305d07ac9b7817d94152897d95918da4cc2c7666092. 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/GBF071603190.
L'Orfeo / Act 1: "Il mar s'inalza e freme"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a0cfc6e0479b6db2d1260bf3e5d22a178102e87fce30db10b139db00c6db1ae. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/GBF071603200.
Silla / Act 2: "No, no di Libia fra l'arene"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf9cffcccc4655ca40e3859341f1fd4c2e362dfdc9272dbb42ec6bc40d62a2d. 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/GBF071603220.
Britannico / Act 2: "Mi paventi il figlio indegno"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83489c214cef5261b464abbef5352c8c3a2c542ceb8777ab886998573805da00. 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/GBF071603240.