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 0x52c727a09dad7a3bfc86aeac6ecc540f3692fc4d5153bd2002d4a762db33c0b7. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9ab22efd-9bec-408e-bc34-e86654f745a2.json and https://artists.proofprofile.net/proofs/artist/9ab22efd-9bec-408e-bc34-e86654f745a2.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 0xc480e10f0764d07e2455cb32ae06ecfa84fd9b98cff0bcc22348e7ce71a9a6e0. 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/TCAFZ2299849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa985eb6e51ee697fd1f62f2fc8c7139ed37f2e0ef00ac05df7d606d6ec43a4a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ITD872024001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b208b13f585f889b0935b9cf55362f925a3d1f65198bfc44d5d6b8b47c3800. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/ITD872024006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d315120095568efa9af37602f83cdf438b76db043124a86c1c44c5cc3b51d52. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/ITJ501708031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73725593e440cbfe0f64d220bf51a827ccea2f154f7cfcde704208cd44e68208. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/US29B1961660.
We Wonder (feat. Julian Oliver Mazzariello, Jacopo Ferrazza, Nicola Angelucci)
I Wish (feat. Julian Oliver Mazzariello, Jacopo Ferrazza, Nicola Angelucci)
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITH1M2200053.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITH1M2200054.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITH1M2200055.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITH1M2200056.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITH1M2200057.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITH1M2200058.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITH1M2200052.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITH1M2200059.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITH1M2200060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99bce4fc73a183daa8fe1366efd8c12cd58ad83bf598bcdab64d91fe645434fc. 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/ITD872023002.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITH1M2000012.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITH1M2000013.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITH1M2000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065bf428c31fd6ac6416847af04d743c2b4140fb1e761768bc6cdf3929fd6912. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/ITB201285104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62e9a73579edbee18d0d5272b2e48395363ae334c90514c73f256fb148b6151. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/ITAJ21402011.