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 0x4f3b5a927a46ac2e2368c45d38f0a07f8f241acfcfeb694c9fefec321b942dd1. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/be291f57-cc24-4351-a592-f8770d072666.json and https://artists.proofprofile.net/proofs/artist/be291f57-cc24-4351-a592-f8770d072666.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Rubbra: Improvisations on Virginal Pieces by Giles Farnaby, Op. 50: No. 4, Loth to depart
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 0x36f2334fdd614bfb29f919e9ca9793efcbda3274afa2fe43a9c2328c9acccccf. 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/GBAYC2000682.
Britten: The Rescue of Penelope & Phaedra
Concerto for Viola and Strings: IV. Triumphant
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x435fd9f66972e04d90dbf755910b7c4bb5c4c0c9fe7ce9a90d808d3fb18315c0. 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/GBXSY2300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da07a11663bd0bfe062e569408ac17a2ef7be7c13e1efec9d2f7b29f5227ba1. 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/GBXSY2300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe35da7cc6ea9edfa28aaf01d453a29cf835a41fbb6d0ef4de40a2f93a87d75f3. 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/GBXSY2300031.
Concerto for Cello and Strings: I. Turbulent
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44511ed542b5faab925a8f22c1b02406b19486945106e3eb5617589cb64f4729. 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/GBXSY2300033.
Concerto for Cello and Strings: II. Longing
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91cf0f3610cf63d6149293587d500f7bbb868dba91434d06271db97e3bda2273. 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/GBXSY2300034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x121b0c92ae99424e74fc5fbf410b3025388cb9433cd3aa991b8566a0028282f7. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/GBXSY2300025.
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
Concerto for Viola and Strings: I. Confident
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3150e8aa2b7a6080c74df02a666ade795c1c13f5ea79f555adba6590490bfe. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/GBXSY2300026.
Concerto for Viola and Strings: II. Passionate and nostalgic
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292e10b287edbc5dce1f4ab36622b45b79cc0bcc0a03ca1e46f5ca9909b0b02c. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/GBXSY2300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc0177d2ff04e7db8b8d202aa31da47f58b4b0e62e9219daba4d4928a22c13d0. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBXSY2300032.
Concerto for Cello and Strings: III. Radiant
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee281c64f4a2f65e14fa83434fedf425f27d688631e9ea3095f5e1727d03e8d. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBXSY2300035.
The Golden Age of Light Music: War and Peace - Light Music of the 1940s
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372cddd6274753fb293787593be83581c23c048752d8a8a511091dbe2ce74767. 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/CH6631057101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7fd6b65ba81440b87a4b72f0803a915a5285555da2e3c77f63937127f165fd. 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/CH6631057102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b695a0bc20a6800dee80384e98f12c25cb1d2789641ce60a0a9f8b7e8c2a219. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH6631057109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3b1835fb67ba7e8744acf215a5706b99fa58a7ecba68075923d5f34229fb0f. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/CH6631057114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf6a88838f8f0d2947d90e38de764861e73ac33beb02fd9699adc226c8a6ef6b. 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/CH6631057116.
Tchaikovsky & Brahms: Concerto for Piano and Orchestra (The piano library: Solomon, recordings from 1931 to 1947)
Mozart: Piano Concerto No. 21 in C Major, K. 467: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101c16b1e20a9428886c7838e6ac791e8f426286b3983d11a32c76cdf1f5709f. 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/GBAYD8700529.
Sibelius: Karelia Suite, Op. 11: III. Alla marcia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e7aa5396cc8c4d28f339689a904142b6f11912b47647a2cc826330e7c8032ba. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBAYC0000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f5b7ec5c024f68829e272c970332ac6691fcd842d77d58bddaf4bb89939e94. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBAYC0000001.
Franck / Arr. Sandré: Mass, Op. 12, FWV 61: Panis Angelicus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8260edb1c861e33cf90a50bc755f7c394eb9f03d233e6f74edcb2ac15b24a63. 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/GBAYD8800084.
Handel / Arr. Mackerras & Rothwell: Oboe Concerto No. 2a in B-Flat Major, HWV 301: IV. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03c7677bc3ff51c472229ac6498e13a74d09f5faddaf422888901d73ec0c853. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYD9100493.
Verdi: La forza del destino: Overture (Excerpt)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe02a9ec0a2f22534eaf3bc7171d0408409044f46ab1731034befa4d220ba21f6. 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/GBAYC9105680.
Handel / Arr. Mackerras & Rothwell: Oboe Concerto No. 2a in B-Flat Major, HWV 301: III. Siciliano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68da3ff8570627d1c1d4a75f55af5e8a739edacc6dbd94194e4f9054c645d541. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBAYD9100492.
Handel / Arr. Mackerras & Rothwell: Oboe Concerto No. 2a in B-Flat Major, HWV 301: I. Adagio - II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf701c4041afaaee5298f6b7ee0542dbb70e936cc58faf3fb931369428aeeadb1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBAYD9100491.
Piano Concerto No. 21 in C Major, K. 467: II. Andante 'Elvira Madigan'
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c392c74031330df01071096ccec3fa16ae85207b6c6031b71ac564df464fcb4. 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/GBAYD8700389.
Mozart: Piano Concerto No. 21 in C Major, K. 467 'Elvira Madigan': II. Andante (Excerpt)
The Most Peaceful Classical Album in the World...Ever!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c392c74031330df01071096ccec3fa16ae85207b6c6031b71ac564df464fcb4. 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/GBAYD8700389.
Elgar: Variations on an Original Theme, Op. 36 "Enigma": Theme
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x287401f3246a53c5fb73c931dc3a87c398cfb46509fbfec03316c4544a11773a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBAYC2000150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe02a9ec0a2f22534eaf3bc7171d0408409044f46ab1731034befa4d220ba21f6. 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/GBAYC9105680.
Dvorak: Serenade for Wind Instruments in D Minor, Op. 44, B. 77: I. Moderato, quasi marcia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908a91412ef7bd3153a976b7cb1119ed34b2f152bc2ebb8dbbd8a73659828d60. 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/GBAYC2000755.
Handel / Arr. Hoffmann: Suite from Serse, HWV 40: II. Largo. "Ombra mai fù"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7058214468cbb1c7cc119f8db190629be5d85667424f3eda10aabf5b2d6c3c87. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:08:52Z), 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/GBAYC2000770.
Strauss, Johann I / Arr. Jacob : Radetzky-Marsch, Op. 228
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3171e2176212ecea6940ab5d44915f7f70aa0c0f9dfa6eeb95445ea8b3969bfa. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/GBAYC2000859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b7dac1f47308ced8f8f05eaa195649004639f493ffbb16d749b15ed591b2ac. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/GBAYC2000862.
Vaughan Williams: Symphony No. 8 in D Minor: II. Scherzo alla marcia, per gli stromenti a vento
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d136f8b67a541ae7a3f59ef95143f627a78d87ec42b493aca6ef40c65ec07f7. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/GBAYC2000845.
Grieg: Suite No. 1 from Peer Gynt, Op. 46: I. Morning Mood
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81eb8d8936df27dbee6dcd32201fc49f2d72c098bbb9f9908b666500f9140d44. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/GBAYC2001475.