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 0x62a0e63050f973ca8ba3a57d57163c35d884052e5b4fc391b1e446d666dbec8b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c5d4d905-ce61-4719-9a60-eae6ab99b84f.json and https://artists.proofprofile.net/proofs/artist/c5d4d905-ce61-4719-9a60-eae6ab99b84f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Debussy: Clair De Lune and Other Piano Favourites
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 0x5bed62f411e76339b18612f318abab9c1d2d6ca6bd034a49a5e5f2b3a3ec7f25. 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/GBAJU2000189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x869dcc907823a96681595c080112999ba176468ac463b2a78f470bf202389b2d. 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/GBAJU2000190.
Suite Española No. 1, Op. 47: I. Granada (Serenata)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4efb3951d23a102e2e3616ce2e12a962b962eff72a6498ce38f8396c37b61fd. 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/GBAJU9800172.
Suite Española No. 1, Op. 47: II. Cataluña (Corranda)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x667639635eeb38f84ec8f3feecd1bc28f4ff094f83e50074bd509b016ceada2d. 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/GBAJU9800173.
Suite Española No. 1, Op. 47: III. Sevilla (Sevillanas)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2c7daa6bc7bd08f6d8b6b599529ccba8bcb3e64093a5097b4cbd26b194b6cc. 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/GBAJU9800174.
Suite Española No. 1, Op. 47: V. Asturias (Leyenda)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a4540bb07311c7ffaef50b92749108e3f109d477b4073dc458dcf7919311c1. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-21T20:36:31Z), 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/GBAJU9800176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82bde26f58db13ebefe653da2339bf393bd293d4991ef030fd7a5700a1272bc. 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/GBAJU2000195.
Piano Sonata No. 5, Op. 82: III. Reverie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce03fc9ba61fa33d6b696e0c79ef9fc7c9c9708c2a5ed119e7dc085eaa990921. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBAJU2000193.
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
Suite Española No. 1, Op. 47: VI. Aragón (Fantasia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5b5b64824e45b7409a7db7a99a05fbd29e580ca885ec9304170476cf5f17518. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/GBAJU9800177.
Suite Española No. 1, Op. 47: VII. Castilla (Seguidillas)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e8240c444b7dcc0c0e5b517319e9d4d451374952972ef7905545317f810425. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBAJU9800178.
Suite Española No. 1, Op. 47: VIII.Cuba (Caprichio)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dfb46f8468ee796bf2ebdb1568215726f97ffd94ab2522768cd1ec9fcacecaf. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/GBAJU9800179.
Françaix: Music for Solo Piano, Duo & Duet
Pnova American Piano Music Series, Vol. 7: William Grosvenor Neil "Illuminations"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d880d9eb01624517a75880c821760f4ba290d44cf7c2ba4e43c5230a913911. 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/QZABR2400030.
PnOVA American Piano Music Series, Vol. 6: Kent Holliday
Elisabeth Lutyens: Piano Works, Volume 3
Três Estudos. Em forma de Sonatina: No. 2, Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f201ca6ce7049fcfd411c0c378a1541aa1c8304de15477a60476b407e3e20e3. 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/GBAJU2400119.
Maconchy, Lutyens & Wallen: Works for Piano & Orchestra
Elisabeth Lutyens: Piano Works, Volume 2
Discover the Piano Music of Daniel Jones
Elisabeth Lutyens: Piano Works, Volume 1
PnOVA American Piano Series, Vol. 5: Music by Harry Bulow, Robert Fleisher, Jonathan Newmark, Tim Reed, William Neil
The Best of Martin Jones: Discover Granados
Discover the Piano Music of Alan Richardson
American Piano Series, Vol. 4: Music by Ingrid Arauco, Kent Holliday, Tim Melbinger
The Best of Martin Jones: Discover Guastavino
Joubert: Piano Concerto & Symphony No. 3
PnOVA American Piano Series, Vol. 3: Music by Scott Brickman, Keith Kramer, Francis Kayali, Ssu-Yu Huang, Margaret McAllister
Rachmaninoff: Virtuoso Arrangements for Piano by Earl Wild
Saint-Saëns: Music for Piano Duo and Duet, Vol. 2
PnOVA American Piano Music Series, Vol. 2
Saint-Saëns: Music for Piano Duo and Duet
Duettino in G Major, Op. 11: I. Andantino grazioso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494463b501b3dc41ae20b3283473e144a3263b1111326f4b4a48f70fc9ac5f49. 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/GBAJU1600648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee28f6eb0a86446748ec7132543fdcbfbd6e8a8ee114cdbe0d92f600fdc43c5. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/GBAJU1600655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2062b028c0bb37c9167203d606380601a65be66007734be6b0f538a8cba7035. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBAJU1600656.
Sibelius: String Quartet in D minor; Delius: String Quartet; Cello Sonata
Transcendental Concert Studies: No. 8, Boy with Flute
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5178b48860e9689c074c629473383bd5ecca400e07ef959f1c4dddaee86f4a8b. 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/GBAET2400461.