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 0x62a0e63050f973ca8ba3a57d57163c35d884052e5b4fc391b1e446d666dbec8b. 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/c5d4d905-ce61-4719-9a60-eae6ab99b84f.json and https://artists.proofprofile.net/proofs/artist/c5d4d905-ce61-4719-9a60-eae6ab99b84f.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Debussy: Clair De Lune and Other Piano Favourites
Cinco danzas gitanas 1a serie, Op. 55: I. Zambra, A Flamenco Dance
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 0xdabaf23d515209a755efc9cb163e7767cd0a86aca9aa69c34b943e0f1a0928e6. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJU9500934 — a six-check JSON result.
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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJU2000189 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x869dcc907823a96681595c080112999ba176468ac463b2a78f470bf202389b2d. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJU2000190 — a six-check JSON result.
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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJU2000193 — a six-check JSON result.
Suite Española No. 1, Op. 47: I. Granada (Serenata)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4efb3951d23a102e2e3616ce2e12a962b962eff72a6498ce38f8396c37b61fd. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJU9800172 — a six-check JSON result.
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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJU9800173 — a six-check JSON result.
Suite Española No. 1, Op. 47: III. Sevilla (Sevillanas)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2c7daa6bc7bd08f6d8b6b599529ccba8bcb3e64093a5097b4cbd26b194b6cc. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJU9800174 — a six-check JSON result.
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 (2026-07-07T15:12:44Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJU9800176 — a six-check JSON result.
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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJU9800177 — a six-check JSON result.
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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJU9800178 — a six-check JSON result.
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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJU9800179 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82bde26f58db13ebefe653da2339bf393bd293d4991ef030fd7a5700a1272bc. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJU2000195 — a six-check JSON result.
Françaix: Music for Solo Piano, Duo & Duet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffdf6ecf07ee3c76ae36f556b8cef59ed8f382b37b33292d5a14529fcdb9f88c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJU1500625 — a six-check JSON result.
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 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZABR2400030 — a six-check JSON result.
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 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJU2400119 — a six-check JSON result.
Le ruban dénoué. Douze valses à deux pianos: No. 1, Decrets indolents du hazard
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05b9db5c34a9c9b2a2690ab5288b6d041a492026794af8d3697d1acd1bda7a0. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJU2300267 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe716bf952c067ea28de7e7d345489f4d2f8bc90f1697f30ec1bfb34b2ee4c85b. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJU2300313 — a six-check JSON result.
Lenda sertaneja, No. 8 (Version for Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bec1343e49029d1b9138cb46e4c00fea12f5e5c3adc4c0b9c25fbd94e0e1a29. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJU2300174 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f5753e8d4fbfda5b24b729cc2c08fd2bf5f9b16d13f75d1f6849be72c155bb. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJU2300176 — a six-check JSON result.
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
Seven Preludes for Piano, Op. 126: III. Starlight
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40b113e0cd9344eac3a8492596a884f8a4882223275c315958f7e44bf4a53a6. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBC3S2129103 — a six-check JSON result.
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 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJU1600648 — a six-check JSON result.
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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJU1600655 — a six-check JSON result.
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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJU1600656 — a six-check JSON result.
Cabaret Songs - O Tell Me The Truth About Love
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b403fc90fbf4dd7cc04eca0e14ea4967169a9c5a0144bda2115893c9031cace. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL6140991 — a six-check JSON result.
24 Preludes, Op. 28: Prelude No. 7 in A Major
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6d72037ea227ad19ad7940ee25b65cbc5ee22daa55632bad21acb86d000f38. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFMG1442216 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e113b03ce58199e579d12acddafa22455b218d3b371dc98282c5dd5128364e. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFMG1442219 — a six-check JSON result.
Sibelius: String Quartet in D minor; Delius: String Quartet; Cello Sonata
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e8f590c058844571d9a9bed59dad4bb54883f3a87e98b3b5a3f2505ca89012. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077813401 — a six-check JSON result.
Transcendental Concert Studies: No. 8, Boy with Flute
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5178b48860e9689c074c629473383bd5ecca400e07ef959f1c4dddaee86f4a8b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAET2400461 — a six-check JSON result.
Bagatelle No. 25 in A Minor, WoO 59, "Für Elise"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32bc59cbe9e1d3fd7279f4f284197f5ffbcb4ab8e962f5f6d7abf1da406cc2d9. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US6R21442808 — a six-check JSON result.