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 0x24a281ab1735e367bade47cdefdbddbfff5b6d4892cee4742c073f295f4bc413. 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/cc8978b9-1f6d-466e-b1b6-fb14ffb540d9.json and https://artists.proofprofile.net/proofs/artist/cc8978b9-1f6d-466e-b1b6-fb14ffb540d9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Signore e signori, io sono Ricardo Cassinelli
Rigoletto / Act 2: "Duca, duca!"..."Scorrendo uniti"
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 0x512a4c39e857d6aaf261b6a08eb721866fff4da997f89d717d4e415c42178171. 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/GBF077130117.
Rigoletto / Act 1: "Gualtier Maldè...Caro nome"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d496897973b782e6f662f911737eaa71deadc6ed7dc1b06a539700dabf6f69f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBF077130113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x512a4c39e857d6aaf261b6a08eb721866fff4da997f89d717d4e415c42178171. 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/GBF077130117.
Rigoletto / Act 2: "Povero Rigoletto!...La rà, la rà"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b551ce5d97375416045cad62e600094b3e0a7bb3a0ac42c355b0bb628e3b968. 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/GBF077130119.
Coro Di Voci Bianchi "Guido Monaco" Di Prato
Orchestra del Maggio Musicale Fiorentino
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2027594fc3fa1185c0216ff713b39bb9ee3c08798a2c804330a4e987d2ab488b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBF079144126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ffe11d1bd3ae17146b1825d151e71500d623e57db23e761aeed510aa1a90ed. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBF079144127.
Gianni Schicchi: "Ai miei cugioni Zita e Simone"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5638cdf0813e84a17eaab85980e6089b743dd2aa1c9e43d6ce7bf48c167cb6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBF079144128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x502fc97f111e10d7984ffe479680893f2a7c55e927ebce2db71c2c9bcbaa7e26. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBF079144129.
Gianni Schicchi: E non c'è nessun mezzo...
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc1fd37c23d44dae5cf2b823760d519d2ad140b1fe849c7a0aa2da70caeacc2. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBF079144130.
Gianni Schicchi: "Quale aspetto sgomento e desolato!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8babfeb9441d1310b90c4dc896a19f627cbe0690755537300ad695b85897291. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBF079144132.
Gianni Schicchi: "Datemi il testamento!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb563ddc976b161e4dc37a4e69398314061eacacc2db9034ac964ef47338d0a87. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBF079144134.
Gianni Schicchi: Nessuno sa che Buoso ha reso il fiato?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ba73a57b45a2bb51ee4c1cc2a7e67108c936ec36323265d6af1be222babcb6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBF079144135.