Alexandre Da Costa is a Canadian concert violinist and conductor from Montreal, Quebec. He is the artistic director of the Orchestre philharmonique du Québec. Education Da Costa has a bachelor's d
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 0x0a558045810cf703cef682093b5731b3448a0fc401aa25156ea0dbb01b6d52ce. 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/c747a70f-7451-469f-90e1-05e20b52e6cd.json and https://artists.proofprofile.net/proofs/artist/c747a70f-7451-469f-90e1-05e20b52e6cd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Freita Branco - Brago Santos: Orchestral Works
Williams, J.: 3 Pieces From Schindler's List / Bloch, E.: Suite Hebraique / Concerto Grosso No. 1
Lalo : Symphonie espagnole, Namouna, Suites Nos 1 & 2, Scherzo in D minor
Carmen, WD 31: L'amour est un oiseau rebelle ("Habanera") [Arr. for Violin]
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 0xd285cfb27e40ecb6a660ea6f7208fdb19650b8ff0334ffe8d14a381bba68de15. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/ES5021601841.
Stradivarius At the Opera II - The Wagner Album
Hommage à Maurane: Sur un Prélude de Bach
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a89d7539f85715588f289f77fbaed6bf3aefc51f715532e0e876899653c32b. 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/CAK721941925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6befceda0864242e949d4e4273eeb734864428b8d52d0b9ef097959f92878e. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/CAK721941926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x313541727daf4574b0afa77e0b190381af67ebd2672dbf0b32734405ba9b9263. 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/CAK721941927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52749d8b9b4431997125c3e4e28012865f2e8df096a4c461cdd817fea5ade82b. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/CAK721941928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x018891c3c881241ccca5ce5fe8cb7ca405d7784a8df373fdfea09914a23ae21f. 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/CAK721941929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21838429801ab157ba075f9b73ea3d611f08bc70a7b6d0d361c29ca5843a5b87. 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/CAK721941930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda40b091062311bebcae96bd67116dcd124b091e6660e4995e642e94fcc0ab24. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CAK721941931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad64ad405e509da0e391a0df4758312da39abb2c0d57bee02c2699b082c233e8. 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/CAK721941932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac832dd4b9bc89551bb98ed8e465f00b69a7476840ed4c8e52e49b90ea47546. 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/CAK721941933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e57bca6799e3054b3caf2fd4b87205eebae7d664e19fe17d81c11ddfe2932b. 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/CAK721941934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9faa3673d822c26934f7ceab7aa6b652ac3d229c4bab73622c7d6a78afb57f1. 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/CAK721941935.
La Vie en Rose (Arr. for Orchestra by Alexandre Da Costa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb5a2bcb7533ce40f22ec66e7c1c07d53657c50d8122b71dd0dde2a2b9f7ea3. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/ES5022202051.
Dance Me to the End of Love (Arr. for Orchestra by Alexandre Da Costa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d6c0e19e8bca20ddc407eea52108f424b52d8147fea76c986f52d94646d6e6a. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/ES5022202052.
Si Dieu existe (Arr. for Orchestra by Alexandre Da Costa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf9d2b492d6a88d162d0e6853f089f3940ac585c48cad3547a60e3c38d99290. 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/ES5022202055.
Hallelujah (Arr. for Orchestra by Alexandre Da Costa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20098d357c1dea831d73704e68b6400c2c13813b07b64ff85d71989a09f2464b. 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/ES5022202063.