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 0xeb5c908867806a481b8e08c9277b0080734a1a8555cd62e9a71edeee2dad54ae. Chain 2 (Bitcoin): anchored in block 953636 (2026-06-14T13:03:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3813367c-99c6-4755-935a-817bd0e79dfd.json and https://artists.proofprofile.net/proofs/artist/3813367c-99c6-4755-935a-817bd0e79dfd.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Changes (feat. Gabriele Mirabassi, Olivia Trummer, Luca Bulgarelli)
I Wish (feat. Julian Oliver Mazzariello, Jacopo Ferrazza, Nicola Angelucci)
We Wonder (feat. Julian Oliver Mazzariello, Jacopo Ferrazza, Nicola Angelucci)
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 0x4d9064f6c5a9425247267795a1c06b3ed2dca5eff241dc80c9ef5abf3f4c67c1. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITH1M2200053 — a six-check JSON result.
Moon Blue (feat. Julian Oliver Mazzariello, Jacopo Ferrazza, Nicola Angelucci)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b2da4d3aa811bf43b7d36a5bac3f681f7b2f31f594769abc0df5bc6dce1a4a8. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITH1M2200054 — a six-check JSON result.
My Cherie Amour (feat. Julian Oliver Mazzariello, Jacopo Ferrazza, Nicola Angelucci, Nico Gori)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd848bac6039c306e91dca7ab56c1569a142547afeb1042454e489ebda5bf66e7. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITH1M2200055 — a six-check JSON result.
Another Star (feat. Julian Oliver Mazzariello, Jacopo Ferrazza, Nicola Angelucci, Nico Gori)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61122ed3c813c575bfedf4607dc51d1451d25c2ca4603e70d23ca2140263f681. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITH1M2200056 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8455bd089c7f3a5e0d301c17d5ab6f464c11f238f50c8904a67494c03971363. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITH1M2200057 — a six-check JSON result.
Visions (feat. Julian Oliver Mazzariello, Jacopo Ferrazza, Nicola Angelucci)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4e6d075afdec6d865f25cb4a47c210aad6034c06049d2c69c5e1a06710516e. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITH1M2200058 — a six-check JSON result.
Overjoyed (feat. Julian Oliver Mazzariello, Jacopo Ferrazza, Nicola Angelucci)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71aaf3817fa3931eee22553c7dc6730318d19900f4df1b084e78d98ae73346c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITH1M2200052 — a six-check JSON result.
Sir Duke (feat. Julian Oliver Mazzariello, Jacopo Ferrazza, Nicola Angelucci, Nico Gori)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e4f4b474e7a384d4599d18055d12b18de01aa66414d4684ec611108fa8c38c. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITH1M2200059 — a six-check JSON result.
Isn't She Lovely (feat. Julian Oliver Mazzariello, Jacopo Ferrazza, Nicola Angelucci)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd97324fb9790925ad1d9c703753adc99abb58ba6c93b5fff367b5d11e3169f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITH1M2200060 — a six-check JSON result.
WE4 (feat. Jacopo Ferrazza, Julian Oliver Mazzariello, Nicola Angelucci)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641f6647be0de1ccf5e84420b5c8ee3f8e0293cd9abc7cf5b01ddf9ef527591d. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITH1M2000012 — a six-check JSON result.
Estudio misterioso (feat. Jacopo Ferrazza, Julian Oliver Mazzariello, Nicola Angelucci)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0115c385f6d5d731b898b986229415418c9f483f1da637e72690fbd06a139cf. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITH1M2000013 — a six-check JSON result.
Bakarak (feat. Jacopo Ferrazza, Julian Oliver Mazzariello, Nicola Angelucci)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3799ce500a56d151bf1aabbe5afa15fdd6a3bd8945cfeeb00ff7604d82062c0f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITH1M2000014 — a six-check JSON result.