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 0x8a63a3a9bd8717c96c8e05db41018f7cd978184438eb3c69f54580e825ade408. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8ea63e97-b4e4-4507-85fa-18200ab1ce96.json and https://artists.proofprofile.net/proofs/artist/8ea63e97-b4e4-4507-85fa-18200ab1ce96.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Westerhoff: Symphony - Clarinet Concerto - Double Concerto
Rolf Riehm: Die schrecklich-gewaltigen Kinder | O Daddy
Dean: Winter Songs / Nielsen: Wind Quintet / Part: Quartettino
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 0x875903d62682c3dcf7b356cf75910041451533a79f55da23f1b147a73709cbf2. 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/SEAEN0332060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91da02c73be871783a8f2610c293949e2af20425b05f95b7dcfc31cc9a73c4ee. 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/SEAEN0332070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x540340de5dbd0647f08a462e7ce20d0e3ad58272a5b81a279323e34f383b01cb. 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/SEAEN0332080.
Elgar: Severn Suite / Bourgeois: William and Mary / Tavener: Trisagion / Pickard: Black Castles
Saints and Sinners - The Music of Medieval and Renaissance Europe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac69e0b5d52fc1af7f563265301d1b3fd4a58b4f2c63e3d2b8a1fec2b2b3c6f0. 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/HKI190008801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x188ee2790b8cff06c118b7a1c1c87eb1c2cbec0a54efdb9b15e521af9b8fd87b. 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/HKI199530308.
Sederunt principes (4-part organum - plainchant)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ccee54ce3aa819cacdac32fb9cb5ed9f5b09950a9fdc65758f383510ebb039. 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/HKI190433631.
Laudario di Cortona: Venite a laudare (Come and praise)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9237648a26b501c09db59d44701fcc02eac84ca3a033d064ce6a7dd1e32f3a. 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/HKI190556909.
Henze, H.W.: Wundertheater (Das) [Opera]
Leifs: Edda, Pt. 2, Op. 42 "The Lives of the Gods"
Leifs: Edda, Part I: The Creation of the World
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d32f7c9b239d596741c9835283f8caeebb4823147ce16e7106ca18063d9e6e. 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/HKI199809201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a1e85aa767091769d2b36dac76d1226b5f30c0aaba2eba1de34ec05bfbdf584. 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/HKI199809202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c38a5e8364c2bb1a49634dc5ee155cedaef4f1da03047baa787ee30443f30c. 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/HKI199809204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef254e53d7895a23219e2b66d2a33b9d8a6aa07c027b270e6d201a560498c2ca. 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/HKI199809205.
Terpsichore: a. Ballet des Baccanales b. Ballet des feus c. Ballet des Matelotz
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce4cf13e854f0e4516388372219c51feabab330b8fe389c0ed6816f6baa8c48e. 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/HKI199809207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c84aec0bfeb50f55a8f76c47e782179608a04aa6ed7b8c2111a2455bcf8316. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/HKI199809210.
Terpsichore: a. Bransle Gay 1 b. Bransle de Montirande
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2d4380b31c8fd6b4404dd26e6493a837eeafda1fcb73ac4f959be9f96e702c. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/HKI199809211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69005d75c467fee4e26295aae9d5a24e7e4a1c75578903abb59fe0a3e0995dab. 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/HKI199809214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff5d43fcc0dbf81f2a3498d4f5f0b838d8fbba5cd7f6fb4ee89f03503131e96. 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/HKI199809216.
Terpsichore: a. Courante b. Courante c. Courante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe70467b2ff2678370cbb1e6748a8699a935a37235c5c9466c9784d17638c2624. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/HKI199809221.
Albert: Symphony, Op. 4 / Seejungfraulein
Leifs: Lay of Helgi the Hunding-Slayer (The) / Groa's Spell / Landfall / Iceland Cantata
Piano Concerto in C Minor, Op. 16: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e805fa66dad8af23e6d7566ef5820574626e1bd198327907e8e24857f8c1dcc. 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/DEB201715201.
Mann: Clarinet Concerto - Violin Concerto - Festpaludium - Troiseme Suite
Andrée: Symphony No. 1 in C Major & Fritiof Suite
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x246df9503547fc13987ab00f166a0ab95716c0528deaaac633632d761b81b32c. 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/DEB202258902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e32a6343f5a3d9794d8b78695cdcdea31aaf3c474a533615de79974b26e75d. 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/DEB202258903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0cd1c862a1f41fad45b71a1a019c35e08ceb567505cf91827ac62e7d318cce4. 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/DEB202258904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9cfb59884e094bb9cb734f1f5cc351df9bc4808588bd3a10bee5f875045c3ab. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/DEB202258901.
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
R. Strauss: Symphony No. 2 in F Minor, Op. 12, TrV 126 & Concert Overture in C Minor, TrV 125
Bruch: Violin Concerto No. 3, Romanze & Konzertstück for Violin & Orchestra
Bruch: Complete Works for Violin & Orchestra, Vol. 2
Enna: Violin Concerto, Overture Cleopatra & Symphonic Fantasy
Bruch: Complete Works for Violin & Orchestra, Vol. 1
Glazunov / Liadov / Bohme: Music for Brass
The Sibelius Edition, Vol. 9: Chamber Music II
Gil-Marchex / Szanto / Niemann / Saint-Saens: Japonism, Piano Music
Sibelius / Rautavaara / Crusell: Musical Souvenirs From Finland