thumb|Langdon as Baron Ochs in Der Rosenkavalier|alt=clean shaven white man, heavily padded to look fat, in 18th-century wig and costume Michael Langdon CBE (born Frank Birtles; 12 November 192012 Mar
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 0xa194fb90d9bda5ea6210d2fe1d40b8e0b71ba3a5bca98e65bdd5d618ea9d54a5. Chain 2 (Bitcoin): anchored in block 953928 (2026-06-16T10:21:55Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1d8774c8-d9c3-496f-987a-307b469b40b3.json and https://artists.proofprofile.net/proofs/artist/1d8774c8-d9c3-496f-987a-307b469b40b3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Verdi: Don Carlos (Live Recordings 1958)
Semiramide / Act 2: Se la vita ancor t'è cara
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 0x6ec980552ea8f37a56d913ae49e5cdb7fa142c7d914b9a9bb7459669182460ea. 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/GBF076540626.
Semiramide / Act 1: Mitrane! E che rechi?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18457541bef734b9c596e0a417eef029d759fb4b847347d3c2d37d21148adb7c. 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/GBF076540615.
Semiramide / Act 1: Alle più calde immagini
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3370d879a583c9a02a25fcb4a74bfe570ee2eb0167b47205e7c21dbb9f6774e. 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/GBF076540617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26df4b17945ee1c71f0c2045057085245e3630dd02834c9815b76c6fd1f72c9d. 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/GBF076540618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba07d0c8b34d06a0af6ca0e68ad138c0a1ff48438b039e231af15d8c7b74a659. 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/GBF076540631.
Semiramide / Act 1: Eccomi al fine in Babilonia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56802c9349c3b8ef6a97f3953df3d3833a0fda6b4e10c0c927a802872f624b25. 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/GBF076540608.
Semiramide / Act 1: Ergi omai la fronte altera
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859d525d8c2b16842b6cef5d9f52dfbf9588e996ed4af73016d607e69c1dd64e. 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/GBF076540619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ae132e3d75d2dc3ac5b26715417c2fe9d0b76dd764d2a0bfb95768ec9934cb. 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/GBF076540632.
Semiramide / Act 1: Io t'attendeva, Arsace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0335b8aa366594033372396287afd2e409de72eed5fb140215925705f7dde3c. 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/GBF076540610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dfa309fac20ca5439688f1928e00da01b20d8bb4ff46a6a620e2ff322ef5e09. 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/GBF076540621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a1a5f717f5d96b501c8e21e613975765f9be8ead9ec37ea245f50999836e8b1. 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/GBF076540634.
Semiramide / Act 1: D'un semidio che adoro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330da6a4b0d6e28338583fb338ccfb0aa6503123f5ef07ebbe94eb6425dd2489. 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/GBF076540623.
Semiramide / Act 1: Ah! Sconvolta nell'ordine eterno
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x061f8166542be8c67b989180b5252baa35563c71a746f326b3aa6be6a461f959. 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/GBF076540624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244c170a0815f0374384ac5696ae40186c0db01713e37f09c652bba34aaeb37a. 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/GBF076540638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55e7e4fa7bae651cb46d4840dfa6d22646764d26f2b2845944884b241618ea4. 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/GBF076540639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59669da23fd8020c7f15191ebc2aa75838bdbf5011edaf70db6111ea29fef52a. 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/GBF076540644.
Verdi: Falstaff; Cimarosa: Il maestro di Cappella – Excerpts (Opera Gala – Volume 14)
Holst: The Wandering Scholar, Ballet from The Perfect Fool & Egdon Heath
Holst: The Perfect Fool, Op. 39, Ballet Music: I. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76771d64cf4a9364500f3366a766c6dfacdaa48e0e258d4fc790a3333d9fc3b. 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/GBAYC0301472.
Holst: The Perfect Fool, Op. 39, Ballet Music: III. Dance of Spirits of Water. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6503470d26429524586e57872ba2112d5347ab48c3f9a6052fdef6ad2eff9c2e. 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/GBAYC0301474.
Holst: The Hymn of Jesus, Choral Symphony, The Wandering Scholar & At the Boat's Head
Holst: The Hymn of Jesus, Op. 37: Hymn I. "Glory to Thee, Father!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa295299415f0c55984d4fb2283e5d37e2cb5d685fc87235065cad5012470de95. 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/GBAYC8803703.
Holst: The Hymn of Jesus, Op. 37: Hymn II. "Fain I Would Be Saved"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48107fd27d6d05cd2321fc641ba981d7c80dd60317d527ab438b40ceba8b231c. 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/GBAYC8803704.
Holst: The Hymn of Jesus, Op. 37: Hymn IV. "Give Ye Heed unto My Dancing"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd52ffbbbe04b129790193e3012ea6f125bd5c3d9b0032bb66c03d3a307ace5. 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/GBAYC8803706.
Holst: The Planets, Op. 32: I. Mars, the Bringer of War
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b27361c0ca1ac55d883d9bb26a5a01c65efb1bf289e36001d2fcc52628d0e3. 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/GBAYD0200001.
Holst: A Somerset Rhapsody, Op. 21 No. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90daa8cebc9bf0dce50f8966e6c63a0c8ede68ec9128ad57f387fb88bff06665. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/GBAYD8700381.
Cinderella, Op. 87, Act I: No. 12, The Spring Fairy (Presto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17deed41b5a28a49f63811b5a817d789ff2d11aa50fc7c992c57189efd9f9cfe. 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/GBAYC8300859.
Mozart: Le nozze di Figaro, K. 492 (Remastered)
Mozart: Le nozze di Figaro, K. 492: Sinfonia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb26c23fb955d41ca8b4201169685b07c27f4edbac0605ec077c18d8b291baa8d. 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/GBAYC2300673.
Britten: Billy Budd/The Holy Sonnets of John Donne etc.
Billy Budd, Op. 50 / Act 1: "Pull, My Bantams!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73886f1eeb560bcc65a90a4f437edc2d6b8240dcf0200a7aca896c8b57021e70. 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/GBF076740302.
Puccini: Tosca: Un tal baccano in chiesa! Bel rispetto! - Scarpia, Sacristan, Spoletta - Act One
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16aa7ac440027fbf68da3313000a63fbc66aa74b5876741ba2fc115b255bd15e. 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/US89R0692329.
Puccini: Tosca: Com'e lunga l'attesa! - Tosca, Sciarrone, Spoletta - Act Three
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6185baefb10302e936101f50690a4246c08150b6b51a73ad0cbabd049fd217bd. 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/US89R0692349.
Haydn: The 'London' Symphonies, The Seasons
Haydn: The Seasons (The Beecham Collection)
Giacomo Puccini : Madame Butterfly (London 1957)