thumb|right|300px|12-year-old Gamba during his visit to Finland in 1949, with Toivo Haapanen to the left and Leo Funtek to the right Piero Gamba (16 September 1936 – 30 January 2022), also known as Pi
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 0xa7c75ae0e996b62670069ada1733e5130f0b9a0c6b073d9bb81d3b5917809375. 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/babab991-9ac2-437b-bcd3-980bb16b629d.json and https://artists.proofprofile.net/proofs/artist/babab991-9ac2-437b-bcd3-980bb16b629d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Beethoven: Piano Concertos Nos. 1, 2, 3, 5 & Rondo, WoO 6
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 0x52bf252f4e167fae14209edb16011a3c90a9e552bcbfee254aaa6562b0863739. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBF071401320.
Orchestra del Maggio Musicale Fiorentino
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833b13cd404c8732f1898c2d1f3e95b0cb63ef37fc7fd0af279a9f4849db2684. 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/GBF079040316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dadab6b9bfc1c115adbc8e2a626da032cee6e2277c8ebecf347b6a4a12dd1f4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBF079910660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69fa3ed33f2cf42ddb8cdfc0e9b13f433ab9c773d1a04637ee1fa15a17982f5c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBF071301260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x337aeee11cc90e8669e62b57beaa83cdc5cde70d5675fec6af59269f57998c5d. 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/GBF071301450.
Orchestra del Teatro Comunale di Bologna
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf4f754cf898bd6f3a47f5903a34fb58260e2545f4ad3cdbc59b7d068ab4b648. 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/GBF071301460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65d8f8a2ee59a55651a5f3f7786f274aef015d30e21358438da0cbf2329408c7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBF071301470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b275cd168055b9cfd7681a78b9fcf8c2154f33040500ecd23d33295442dfa9. 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/GBF071301480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcdbb052ac53e778a98b9b01c5ec6dcb4256a6358158cd6de39c35020f79f9f7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBF071301300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb926b2419e83cb6467c0ae86fb3fa407188fec77bb8375b9ad23dfda3952131. 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/GBF071301160.
L'elisir d'amore / Act 2: "Una furtiva lagrima"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c6d070280618f22169fd9157164dfeafe6691d27cc0510f5a58995388ad4dc. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBF071301310.
Carmen / Act 2: "La fleur que tu m'avais jetée"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc137328b13a41c9614db530e98f9f2293642f8024591fe72ef14f7ad9f77b8c9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBF071301320.
Les Pecheurs des Perles / Act 1: "Au fond du temple saint"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2152643415d283b4a943c3a086b2d53160f7f214117e65b8c9e3e59b1cd11a6c. 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/GBF071301330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0dfa030b6dbc40efeb6724ce8bce2f4a78f21ae344c86db013065b72ac052b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBF071301360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301655783366b42fc7a2f7224a5ae1b353634dc862a095754e77787702ead01c. 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/GBF071301220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3c72b085cc28c50b5b0f522013a7d8713d534a48ebb2878e41269e1c5ba3f0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBF071301230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52253b4385abc8ee43fc78645cd10f65813f60f30049cce512b9408fad95ef34. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBF071301140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d281bdb0dfec4a73910f7ef565eb9e50effcbf1679cf283849ddc2c3a4823d. 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/GBF071301250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd07011903999a97cded898f80408705afc638b15e55cbc5f21cb49cf26db36d. 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/GBF071301770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a9f4c71e2f3fbad6e4ed03ba0e0cc1bf5662de25d25417ceff63b85541f51b2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBF071301580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e6a3c95eb747264a88e7095fa7bff830b0c74501448a828ab55074fb19b8de. 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/USCA29502321.
La traviata / Act 1: Libiamo ne'lieti calici (Brindisi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fbc8abbbe4e0f99ccbea4dcb027010ad978ca30610c61d52d871d59e194ffba. 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/GBF071301430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e6a3c95eb747264a88e7095fa7bff830b0c74501448a828ab55074fb19b8de. 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/USCA29502321.
Milestones of a Legend: Ruggiero Ricci, Vol. 3
Lalo: Symphonie espagnole; Sarasate: Carmen Fantasie; Zigeunerweisen; Saint-Saëns: Havanaise; Introduction et Rondo Capriccioso (Ruggiero Ricci: Complete Decca Recordings, Vol. 6)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a99eddfddaadb54d00372fd716ed8b385e75b2c9a6a434046877880d4bb6e68. 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/GBF078231503.
Saint-Saëns: Violin Concerto No.3; Kreisler/Paganini: Concerto in One Movement; Wieniawski: Légénde; Sarasate: Zigeunerweisen (2024 Stereo Remaster)
Mendelssohn: Violin Concerto; Bruch: Violin Concerto No. 1 (Ruggiero Ricci: Complete Decca Recordings, Vol. 4)
Alfredo Campoli: The Bel Canto Violin - Vol. 4
Rossini: Guillaume Tell, ouverture (Mono Version)
Liszt: Fantasie über ungarische Volksmelodien, S. 123 (Mono Version)
Decca Sound: The Analogue Years 1954 – 1968
Chorus of the Royal Opera House, Covent Garden
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dfa7015436fe9c9ccc5db60a6761181f6caef2f03a5e0ee25a190cfe5315306. 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/GBF077340408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f04b5e4067b87fa8fb401fadf7044fc8cd086709e6723f8c68d38e91180886. 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/GBF076913120.
Werther: "Pourquoi me réveiller, ô souffle du printemps?"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x223ea384539218e731f5182308e51aa5bc254fda1b1218cccce130fc590783c5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBF077900120.
La fanciulla del West, Act III: Ch'ella mi creda
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8712bb1c0f1c76201291e0ab4a05022a201801f4a9281f7734595e197377c6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBF077900160.
Andrea Chénier / Act 4: "Come un bel dì di maggio"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee4d48750a965bc11d3301ce0276c5a7c415565205e7fd0763b3b5809aa3a67. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBF077900140.
Madama Butterfly, SC 74 / Act 2: "Addio, fiorito asil" - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be3f46d73d4dd32a7d89ee7a069b7777936c75fff08cabe94b9daa9602e9827. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBF079312110.
La traviata / Act 1: "Libiamo ne' lieti calici" (Brindisi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d7a0ee1e0e00ae762d3bfca541ae93770a8e0e5832e6786a23922c4c99548c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBF077600010.
Verdi: Rigoletto / Act 1: "Questa o quella"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0019f9dc022b58fefd0e2ad3a8c39631061e7d8bef62b9acb89e92b07817b6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBF078911381.
Massenet: Werther: "Pourquoi me réveiller, ô souffle du printemps?"
Luciano Pavarotti - The Essential Pavarotti - A Selection Of His Greatest Recordings
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f04b5e4067b87fa8fb401fadf7044fc8cd086709e6723f8c68d38e91180886. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBF076913120.
Luciano Pavarotti - Pavarotti Hits And More
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26579473fe063cbfda9c4bd9214f3b7ffdd647b08fa25b3759d65a4fda161a9c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBF079340115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x913765213db4923d43c042b476cf0eebb928c35d5ccc9c1bde37108030f4755a. 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/GBAKW0500254.
Les vêpres siciliennes: A toi que j'ai chérie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c76e3efad3798749ad8a0f06976121e43d44ee41572ffec931edba5ab09763. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USSM18000505.
Ruggiero Ricci: Decca Recordings 1950-1960