The public domain (PD) consists of all the creative work to which no exclusive intellectual property rights apply. Those rights may have expired, be forfeit, waived or may be inapplicable. Because no
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 0x2fc4a3d1e599ad4e8c3d4da7a2a422750db45ab6efe84f63529abd304b198839. 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/a343fbd9-da1c-4525-8baa-055ed18154cc.json and https://artists.proofprofile.net/proofs/artist/a343fbd9-da1c-4525-8baa-055ed18154cc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Rite of Spring, Part 1: I. Adoration of the Earth
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 0xe8b32c1a180781b571d49e4ff1857d5406d9316d4156d4f2ac14823b6027c63e. 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/GBPCP1700436.
The Rite of Spring, Part 1: II. The Augurs of Spring - Dances of the Young Girls
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2569b74f027b285d37d6536d276a6267be5e4d2e048432752acdd1ac887e4d. 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/GBPCP1700437.
The Rite of Spring, Part 2: III .Glorification of the Chosen One
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb83c3ad76d7b88970e9480a9c4ce7f4c8c2a4768771a7bab6975cbe5b5056653. 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/GBPCP1700446.
The Rite of Spring, Part 2: VI. Sacrificial Dance
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dfad9bcaaee1799bd98f6671cc312c9f3993950711b490cb968fd14908c9607. 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/GBPCP1700449.
Tchaikovsky Symphony No.6 'Pathetique', Symphony No.4, Symphony No.3 'Polish'
Symphony No. 3 in D Major ‘Polish’ Op. 29: III. Andante elegiaco
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb448b4e08166e6a61a366cfb84986af6bbbe247d9f94c4cf0efdb74f7eca7448. 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/GBPCP1700277.
Symphony No. 3 in D Major ‘Polish’ Op. 29: IV. Allegro vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f2312684b33f9c6d502258a7a4249c1c638d5cbe2ed610710c660fed2c89c85. 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/GBPCP1700278.
Tchaikovsky: 'Winter Dreams' Symphony No. 1, 'Little Russian' Symphony No. 2 , Symphony No. 5
Beethoven: The Sonatas & Variations for Cello and Piano
Sullivan: Iolanthe, or The Peer and the Peri [1958], Vol. 2
MAESTRO HUGO ESPÍNDOLA, DINO BARIONI Y GUGA STROTER presentan "TRES TEMAS DEVOCIONALES AFRO-BRASILEÑOS" con la ORQUESTRA DE CÁMARA DE CHILECITO - UNDeC, La Rioja, Argentina
Classical Songs for Babies: Baby Einstein Classics
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8fb5c859fd40536f096d6608217ee806817052b20a1b90e492fb758be194bcc. 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/UKP3G2008586.
Beethoven: Bagatelle No. 25 in A minor, "Für Elise"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd083bee82612389061c220675b9ce166a32d8406d82ffa520712fadcbde9a460. 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/UKP3G2008587.
Schubert: Ave Maria, Op. 52 No. 6, D. 839
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242e58cc08cc36965a2961f8b570dc64f3c5a8f27f234c61f9d05ecfc90d07ad. 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/UKP3G2008588.
Mozart: Piano Concerto No. 12 In A Major, K.414 - Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc654a5e790f389f8a83c4a2c955edc945b290d4a52300bb371cb93d912a15df. 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/UKP3G2008589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb81c64f2392fba8de81e8c69e660d5ece5e3548d913a02015fb9d5c296b3bd. 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/UKP3G2008590.
Tchaikovsky: Dance of the Sugar Plumb Fairy - The Nutcracker Suite
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83475718d8a7112ce348057e3bcd30a5f23517866e19928fb2a1125839419055. 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/UKP3G2008591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc77b4c0c8807e0ac2bf0bb3a7e3ac00682c5e6bcdec81b29b99fc5f3de1b629f. 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/UKP3G2008592.
Mozart: "Non piu andrai" - Marriage of Figaro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b91e5dc81347aa34d260ff7c251f987307f9ceedd5d3bb3a0c2c193a29046bf. 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/UKP3G2008593.
Brahms: Hungarian Dance No. 1 in G Minor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f53db1c9d2db478638226289721eef5633ac2f17d9db3a014ba253abd983a5c. 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/UKP3G2008594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef9c195ffa80186b3eb4fb3af911dcfa2fd44f0b27ffd1e8a5267cbb55f5d7c. 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/UKP3G2008595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71bd19fccded1d46b673cccbaf9c419d4b95bffa2b5aa691818f74cf52f56fa5. 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/UKP3G2008596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61b86af7e7f9f062a0cc4f9332c7eca58fd733f3841348f7d6439352933b418. 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/UKP3G2008597.
Kinderszenen, Op. 15: No. 7 in F Major, Träumerei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e31fc1a4f734828acc63eb1b24b01755009cd7c851650608b986a8ce96c2942. 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/UKP3G2008598.
Mozart: Eine Kleine Nachtmusik K.V.525 - Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e1107850ccb0775d4c92032becc6dfac64c105ed9f6469ebc0c810bbe18c278. 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/UKP3G2008599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5bc0006791507cedea6031efc098c63c89ff2f0f90cbe4aae1df898bc9b3db. 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/UKP3G2008600.
La bella campagnola - Canti popolari italiani
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf171d064d97536cbbe007e8d754dd8efec0565581724923fd2163a374903a9eb. 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/TWCC31803224.
Brahms: Piano Concerto No. 2 & Strauss: Burleske
Coral Cidade dos Profetas Interpreta Mestres do Colonial Mineiro
Dvorak: Violin Concerto, Romance, Mazurek & Four Romantic Pieces
Audran: Gillette de Narbonne [1957], Vol. 1
Lalo: Le Roi d'Ys (The King of Ys), Vol. 1 [1955]