Costantino Catena (born 6 April 1969) is an Italian classical pianist. Biography and career After graduating from the Giuseppe Martucci Salerno State Conservatoire under the guidance of Luigi D'Asc
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 0xf609f9fe0634d8f36cf48ca7ff6126fb817f87951c60d2370437e3e40e6cd28b. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6c36c14f-c4af-4835-af7d-5c3fbe46f146.json and https://artists.proofprofile.net/proofs/artist/6c36c14f-c4af-4835-af7d-5c3fbe46f146.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Margola: Music for Violin, Piano & Orchestra
Concerto for Piano and Orchestra in C Major: I. Allegro Maestoso
Orchestra del Conservatorio Cimarosa Avellino
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 0xe202d6a553c32db91a2ce76e15f1e91f4b3613c732f0e9bea9307bf72f21f66f. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/ITK601700642.
Concerto for Piano and Orchestra in C Major: II. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b991181403b71152064602413f380948c0b445cb6462e9b3e324097c3322145. 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/ITK601700643.
Concerto for Piano and Orchestra in C Major: III. Andantino
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x473215468de65fbd74cc80a3b1beecc9a6572d3be8e3ce48cb8532652ada98eb. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/ITK601700644.
Concerto for Piano and Orchestra in B-Flat Major: I. Allegro Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad31673316a483953623eaa78834e5d4125e831d6f7a3bc6470edca1e63d01a. 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/ITK601700645.
Concerto for Piano and Orchestra in B-Flat Major: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e68eb38c152b8f5dc64ef61d118bc08a743b591d3dedcc2e0ae871f264676a7. 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/ITK601700646.
Concerto for Piano and Orchestra in B-Flat Major: III. Tempo di minuetto. Più mosso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3ee1bce698e23c2f54f14ed0927c870bf69caf3aaf7015351d8b14a6ed57b8. 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/ITK601700647.
Concerto in C Major: I. Allegro Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da694a9f089aae158071e0c55b6d0f647c49c73065a9599b67a54ba1862ca66. 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/NLY332401749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe02a41e2adee03453700830541ca3384eabb7cf90c82ab661875412f891f96ca. 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/NLY332401750.
Concerto in C Major: III. Tempo di minuetto. Più Mosso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf132028a665c9042f791532a18bfd5a0373f838e6afc241b8aa8658ece577cd6. 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/NLY332401751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d92da76dbcfc64255ecba8c2f4487bd4177183f7521af298799e8beea873e6d. 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/NLY332401752.
Concerto in B-Flat Major: I. Allegro Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d60be683fbdfab8dbc66c8445810ffd1b6a55c96dc51007ac33e8a6173fc050. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/NLY332401753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3baf70332f1bdcda2066056a55c1e859f6dc2ac2f5fd5cb556b9bd11efeb448. 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/NLY332401754.
Concerto in B-Flat Major: III. Tempo di minuetto. Più Mosso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x333b67db733215aac7f3af9f3e50eb2e5c06dc57c3058bc47e74d58f14f8ae64. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/NLY332401755.
Sonata in C Major: I. Allegro - Adagio - Non troppo allegro - Allegro - Un poco adagio - Un poco Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6d1b4bf478019e20ad93dee6c40009774ff040cd6a0e2f24cd4c3cb6b7d87b. 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/NLY332402250.