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 0xf715cbcd029d2f662d837ad1cf70b9ceabb012085f2bab10b44e353dcbec7833. 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/86a3e5db-8077-4ecb-915f-8aab810b154d.json and https://artists.proofprofile.net/proofs/artist/86a3e5db-8077-4ecb-915f-8aab810b154d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Vimini (Colonna sonora del romanzo omonimo)
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 0x3e6a0ec431c0152d091e5cc8d0995562df378aa17da16a4a706d46e766269b5b. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/ITV701413604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9894ba4b652a47d264167ea7ffb4218a7735575027b3ce48552e86a7907721. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/ITV701413606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ce66919e48176d4444446a45e8d6002887844cb652dc99fe4995ab046f43a9. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/ITV701413609.
CantoStefano (Fausto Mesolella canta Stefano Benni)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d4a7ff7c1948476c7498b8967013fea81c64a0d07b40e6f01b3c9311b21cac3. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ITSX31500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dce428c059ca501095da7b436b379797eacf5ec4fc1549ed83627bc7442eca5. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/ITK601101508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f208f801db5d221ae1dd4431dd72ccc9c61b848acf7932325122614cf4fc0e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ITV701615405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb47f0a10c59351a3324b41b285663a1c052dbf0248d3d5bad4934ce619ff4770. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/ITV701717410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba601f89894df6c8531ed55794d342ca78dba0ae1c5c59a417bf646c72758b9d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ITZ040100729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba601f89894df6c8531ed55794d342ca78dba0ae1c5c59a417bf646c72758b9d. 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/ITZ040100729.
Cieli Di Toscana (Edición Especial En Español)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b440007dd7e9f40858e4345f611c78072b42ec606f3cceadb43182ec8a5ed16. 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/ITH471705604.