Massimo Di Cataldo (born 25 April 1968) is an Italian singer-songwriter and actor. Life and career Born in Rome, after the high school Di Cataldo made several experiences poised between singing and
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 0xa7255f36d8b705ec53135db2a38f39d5d9cdb3d666728027caf5183aae6f3708. 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/28b70abf-2110-4675-9655-df312e180733.json and https://artists.proofprofile.net/proofs/artist/28b70abf-2110-4675-9655-df312e180733.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 0xf676aae866bc34a15f0781283b9c1062cea638e5e823315f54cdef074bf254e3. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T13:14:47Z), 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/ITM009700683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa59fe9de368e708a42000fb32914aba52fcda666bc16e0cae3a39c1070e8367. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/ITM009500131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf73586c054d0c71200907aeef209b8c7461595c50e3f8a89813f77e8595224b8. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/ITM009600440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2460bd4e39ae1d5457a16271b47d745db1fbf7cdc72cc6739216aae214414c. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/ITM009700694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d43904d4440fd640768fde4c33ee44eaedf180c2dad5ef9c5ff9016a253c3ac. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ITB000200059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96d68210fe3901e9f35c081382be796f32f8158ca82f5b87d522b895e401718. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/ITB000200070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab25c841bc154ddac3fcb89033da1a8eba9f69370c56685fef7db85d0e5a60c5. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/ITB000500057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d78a78502a367aca508ceb0be975f05b97bc7aa4f3ae8c1c343d6e92958b107. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRX761593941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbdd7c7c124522cce374b8c5cb41f9b23370e0aeb8ddb024f1d55a081051d28f. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/FRX761593947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af025e268ac3e634283748964263d18c878a2365c6a7387bdd6109efb7211e5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/IT0681900034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c860fb070c08028305ef0cfe2af82e228e1dc170b0b8ab89bb445cb4b184b9a. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/IT0RH2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb00777327aea545d744171548cd4a5408a252dd602b16b9f30c60581ed04ee. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CLAA22300305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ff91bccaab164766b758685d921ded89793b8bf7990b8c361a596cf7d63630. 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/ITM009901329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb00777327aea545d744171548cd4a5408a252dd602b16b9f30c60581ed04ee. 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/CLAA22300305.