Lorenzo Ghielmi (born in Milan on 1 September 1959) is an Italian organist and harpsichordist. He teaches old music at the Accademia Internazionale della Musica in Milan and at the "Schola Cantorum B
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a3e851bc298956e6e8108d41d228ce154fe17b9fe744135a763b6cbf7562602. 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/bf5fa8d2-7df6-45b5-a74b-00415b6ac94d.json and https://artists.proofprofile.net/proofs/artist/bf5fa8d2-7df6-45b5-a74b-00415b6ac94d.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d82ecba1f5219ea0b3bba678fcbb6184872a95d3646719c591849610f50a04c. 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/DEA291500104.
The Musical Offering, BWV 1079, Triosonata: I. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e7e69b00f8c8d41e6ed68fad218b0a8ad410796f9e81d3b7db162dab096c63. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/US6R21406386.
The Musical Offering, BWV 1079, Triosonata: IV. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd45c9d45fdc792d20f54be3efdbe35266f74a1c5684ad48c0ad96e9b338eef. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/US6R21406389.
The Musical Offering, BWV 1079: Ricercar a 6 voci
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9568a89ee28527edaa5bbecf74033b3a43ffc461a2ff93226936ba6880757a8f. 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/US6R21406383.
The Musical Offering, BWV 1079: Fuga canonica in Epidiapente
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c921fee1f62a38b263876c51837636b2097ce419dbc0362e4dbabca8ca07a1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US6R21406382.
The Musical Offering, BWV 1079: Canon Perpetuus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a3c2e58edbe390a020a44cdf510e7a15433fa04282b75fee29ce24dccff797. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US6R21406390.
The Musical Offering, BWV 1079, Triosonata: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0a358cc4c2ea69368742655234f49aea489f6e8350915b8ff3570087303a79. 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/US6R21406387.
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
The Musical Offering, BWV 1079: Ricercar a 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd16adf0337cc79d30a55c1a033168a378f1bdb616afd4cfe0bcff76ecc23c616. 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/US6R21406375.
The Musical Offering, BWV 1079, Triosonata: III. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x888d8d51d34e368583190275f38aa6cb732dc4fc3339284febd36c4cfc4acfe7. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/US6R21406388.
The Musical Offering, BWV 1079: Canon a 2 cancrizans
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6dfba5352c9bf17fc918abec222db598184e0567133d76a0f30b62a3d3b39bf. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/US6R21406377.
The Musical Offering, BWV 1079: Canon a 2 Violini in unisono
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf18a45d751ee657b4b2f85e2909b48812f9cf674d1500ed7c6082e57235710a. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/US6R21406378.
The Musical Offering, BWV 1079: Canon a 2 per motum contrarium
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9abe8ebe3c3666486c1a6423143709daa09b0268415a9bb1f0d0b2e11a857717. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/US6R21406379.
The Musical Offering, BWV 1079: Canon a 2, per tonos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26a5dad68f41c148de7852499b5f0c2f5f0bf1d33deccf395a1aa13a3411e1d. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/US6R21406381.
The Musical Offering, BWV 1079: Canon a 2, quaerendo invenietis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b7c3e5d7d4b43cf67582e04f30baa962aeb2cd8cad36bcb47a821e01dae9d5. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/US6R21406384.