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 0xe87ba40f7cab8d633edc8901a12afb5c63cc35f0b6d081f35c1b2a6c8989e544. 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/5d9db968-ad6a-4fc5-8bac-dbb73e509e8a.json and https://artists.proofprofile.net/proofs/artist/5d9db968-ad6a-4fc5-8bac-dbb73e509e8a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Salut D'amour, Op. 12 (With Kim Hyo Gyeong)
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 0x7b3329aa817538fc429565f8fd501664bcf3ef24436e70d2f386a559ddcd61c8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USA370990920.
K-Pop For Piano Vol.II (Easy Piano Ver.)
Chaconne - The Most Pathetic Music On Earth
Sonatina in C Major, Op. 36 No. 3: I. Spiritoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543a90f0f7a2b4082e295c2ef114e45c6faf7cdd785c4da17eec8f11f35e9f78. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USA370989708.
25 Études faciles et progressives, Op. 100: 1. La candeur. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x431aa025f2a6554aa61bd0c7b659365873f719f3d9d478f5d309e8922c5e8cfd. 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/USA370989619.
25 Études faciles et progressives, Op. 100: 2. L'Arabesque. Allegro scherzando
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c16103bdeb1ed0930966ba219585975c05b5a6bc0f504725c997586e4a86aa. 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/USA370989620.
25 Études faciles et progressives, Op. 100: 3. La pastorale. Andantino
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x768817dacb040877c254a79a26e2436f049430cc553540877b6d4a380678cf70. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T15:41:47Z), 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/USA370989621.
25 Études faciles et progressives, Op. 100: 4. La petite reunion. Allegro non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc6e67dfe2fe0ecb07e2993c5355496fa343ad7cd6d02c23326c4329ccfb4a8c. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/USA370989622.
25 Études faciles et progressives, Op. 100: 5. Innocence. Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01cc097318b2b0a17297023fd7414c8f8ef5b1555aa666c872754ca22e1dc7db. 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/USA370989623.
25 Études faciles et progressives, Op. 100: 6. Progrès. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x280d097ff80f7eb07196a628e59cbcc8f6b2802224604d6420f5af69677d90cb. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/USA370989624.
25 Études faciles et progressives, Op. 100: 7. Le courant limpide. Allegro vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ea2c832de1780065837f1cb4cc92c40001692faf304a47becc063455f83ef7. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/USA370989625.
25 Études faciles et progressives, Op. 100: 8. La gracieuse. Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9414972e3a7b616f0abb1cf3ab01516671a78ece84341b093f39804859d942b8. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USA370989626.
25 Études faciles et progressives, Op. 100: 9. La chasse. Allegro vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e957de782572ab09d7ad5e60939ca57569ee8a1bcb52092ded87699ea15d306. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/USA370989627.
25 Études faciles et progressives, Op. 100: 10. Tendre fleur. Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9170811a84ad9df178287a511a17da94a6ffd9d1ff49c1a4f9dea21279fdb84. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USA370989628.
25 Études faciles et progressives, Op. 100: 11. La bergeronnette. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x030c1052c8ec80e7de6cd766f4ea28b107abda1d928c73eeea803ccfdeca5076. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/USA370989629.
25 Études faciles et progressives, Op. 100: 12. L'adieu. Allegro molto agitato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6fa4c8d8ebcc71f3db9f3b0fa1c739a6d70a0fa85504a2df6ac76aa34b033f. 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/USA370989630.
25 Études faciles et progressives, Op. 100: 13. Consolation. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc99c55a3b280d40a859c97de5ba991d5354d9fba3deb1b8c22293a0e4027151. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USA370989631.
25 Études faciles et progressives, Op. 100: 14. La styrienne. Mouvement de valse
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf3af846f9b825269334cf32af6498f967bc689498bdc84b1e76b56f96675e37. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USA370989632.
25 Études faciles et progressives, Op. 100: 15. Ballade. Allegro con brio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3271d99b75fee4932906ed981ce68fbac1663b0d0ce5bf777307c60263fcab90. 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/USA370989633.
25 Études faciles et progressives, Op. 100: 16. Douce plainte. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x633eb51c56333fa414de150328d53e6cc7b6d5cb46c372c917ccf77686209a54. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USA370989634.
25 Études faciles et progressives, Op. 100: 17. La babillarde. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x615367fa92e98dd2f6781a3adac0e728a7d868c67c031e0fe91f884b82f7671e. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/USA370989635.
25 Études faciles et progressives, Op. 100: 18. Inquiétude. Allegro agitato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65bb8b4a9e5e5778de851682a5d4e937538165aed6ff3a5961011e5b9a0b1b72. 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/USA370989636.
25 Études faciles et progressives, Op. 100: 19. Ave Maria. Andantino
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a7fc49e81f7ad759a15b12fd0931c9044b9d361400deb30c9cf38de4c22f1e. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/USA370989637.
25 Études faciles et progressives, Op. 100: 20. La tarentelle. Allegro vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x343584c33ce5a57c908d6682396441a1cd546a91eba6e97fee09482d481cd28a. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USA370989638.