Claudio Constantini is a multiinstrumentalist (pianist, bandoneonist) and composer born in Peru and currently living in Spain. Known for his eclectic nature, he feels at home in a variety of musical g
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 0x69d813def7a45fbaa113f96a6246794b5a8f1aa57d57144817d4a6d83796f93e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5ad22998-2c28-4b42-91ef-34b085f5eda9.json and https://artists.proofprofile.net/proofs/artist/5ad22998-2c28-4b42-91ef-34b085f5eda9.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 0x7c27daca66951f8cb189df5ac54a23be15f96c165be57fd8c46e9eb05f546d25. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:43:36Z), 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/ES59G1812505.
Piano Cosmos (vol.2), Nine Tango Preludes
Piano Cosmos (vol.1), Through the Eyes of Innocence
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf857c3d64c9a57f541a131514e9fbe606f2e7a14381d9bc45f32d7d4b37d2759. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:23:15Z), 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/QZHN72152020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa686715c472268825cb02a4707f7020caf0387435fb5969c716fb23dc49e1a60. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZHN72152024.
Piano Cosmos (vol.5), Three Miniatures For Bill Evans
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa818b5e1fa0e199bdd5bc831847cb3d3aa7da3a23ab48945d3789c71ddd9d785. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZHNB2122020.
Piano Cosmos (vol.4), Trois Valses Tristes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3958c9f2f3ae9111cde0ebf93b2de0ad6cca16d5a17b12a66e4f9d8a79b2ab7. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZHN52273282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a50e4bc5db29264587734edccdcefe42c5b24c3bbac01216133c9b9feace58. 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/QZES82244865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7726fee056fd94652130beccc8a99039f0816d5e36402c8241824c0fb5b8f1. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/QZVEM1847630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf381f040150fcc86cde0ed51271f42f1e3778b7574ce6b9696fab7adffb723. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZTB72334597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b2e3db6fe7336b488f3dd02b8a12cf6902df6ffe3c66c81a8ce1daa628ab0c. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QM4TX2487621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14db0a4549584fc850395eb82b60bbd1021a980c3955480ae642b00595f7397f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZPEW2444078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4832ad730dabadea96bc5ca2a2054aa77da48fea092cba5aa2926ad11986346. 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/QZPEW2444080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1f155f90b5dff408d82cff3c9c8603d387a1fb08013c7940ebb21c277b46f6. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZPEW2444081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f824d5c90f59ca7449cfa3188d8172015783aff04e9b69139170c3ddc9c7a8. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:45:43Z), 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/QZPEW2444083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe37d4767644dabd8669056808af323eb6c1a36e9c4ab4349926e392fececa1d7. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:46:12Z), 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/QZPEW2444084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5035d6e494fe2100d708d05e0bd24c4ba631abbabfe5bbc2711d40178a5e47f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZPEW2444085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4ffce28fd6789b2783b2714ea4b6b944adbfa29b28ffe5c69b70df113950ba. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZPEW2444086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ac1ac8eb5c2aa963003ffcc28a1a9a156b9861a5fdace029daa31aec9b026f. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/QZPEW2436073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330c40ed7b7cb8ec20ceb62f78bb01637c59dbeee6cd4c91f77a6db6bfa3b839. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZPEW2444089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadea20baa24ccc1515d3f2e303e97ff2fa771080f1e2d1fc28e261b45c275688. 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/QZPEW2444092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbbb35ac8ef3fce0c566f20392e3b0b532138bec6784c2d26866dd2711a7b6c2. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZPEW2444097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f72ae0fac23fd1e50749924597b59e0c7080a9733d0cddd7ba7e1146f6e3887. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZPEW2468204.
Bach: Cello Suite in G Major bwv.1007 - Arr. For Bandoneon
Bach: Partita in E Major bwv.1006 - Arr. For Bandoneon
Bach: Partita in D minor bwv.1004 - Arr. For Bandoneon
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb65fe2883f34ca0271aa15a082744edc54fd68408f6c655922680c2b433dd055. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZPEW2479354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355f23b73a46b723b742adae0825b7b4abc116a5145ca0c64a6460c4af2827c4. 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/QZPEW2498616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2731d3cda226f1ce0f4b53710d67d599b694161f824f6e06d6e5dd7a9343ed1. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZK6K2514282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a706a0b3a7203324b5aac0669d56282f71b967363d7ec5cd9c384f903fb58d1. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZK6G2553173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed21d7546bb38f2f60148271364dbd23113867580c6226fbecdc0741dbd088fc. 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/FR50X2066401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf454eed0810a2f7cc52267a8d66620c3d8c3016b2b1dd6cab3e4de2279395553. 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/FR50X2066409.
Chau Paris (Arr. for Accordion, Piano & Double Bass)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed21d7546bb38f2f60148271364dbd23113867580c6226fbecdc0741dbd088fc. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FR50X2066401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd20e8a33b64ad787294a4ed53ff702bb7dda77adffdbafb98eb9b8aeac1ba4. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:37:09Z), 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/FR50X2066411.
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 0xf47337ef189f94d2d6cd8c2ed4780bd25ee04079154d4ad2e0ad6ff6e5290085. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/FR50X2066408.