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 0x7292fb2a0a81c00ff638476f133768526912bc99725a8903415b772ea2dc0bd2. Chain 2 (Bitcoin): anchored in block 953941 (2026-06-16T11:51:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2199a64d-cb79-40ae-964e-628a0ef32626.json and https://artists.proofprofile.net/proofs/artist/2199a64d-cb79-40ae-964e-628a0ef32626.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Introduction And Allegro For Harp Flute Clarinet And Strings
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 0xfe1534a8b8b7f850ffd6706883c76c0e8ae7175f90f8e4693c4c09551481c7c2. 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/DEF058903200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ab06afaaae1777444caa205f2c26ee4fb949e09b5888d070c0a50c7d9a0f02. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/DEF058903210.
Sonata For Violin & Cello, M.73: 1. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24594c07f019a27bab259acc054b7788d336f2cfca52a30966278d465493d4d5. 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/DEF058903221.
Sonata For Violin & Cello, M.73: 2. Très vif
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3eff43f7042300d974de8f066f17236e9ca5283dc4368bc8f1fb689d5b565f5. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF058903222.
Sonata For Violin & Cello, M.73: 3. Lent
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x631e7ab659080b33454c56a9c3c6a4074c9b8bb01e8a28d8a80bb6505ba2880b. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/DEF058903223.
Sonata For Violin & Cello, M.73: 4. Vif, avec entrain
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe39f06cc66c223c22cf40ef20b869806ee29e4dc67088de7a0ae22f9f1b8814. 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/DEF058903224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ae2b9c46e251ccad77d64bae12dbf6773b9728dd242776f10330196996d1d3. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF058903230.
Sonata For Flute, Viola And Harp, L. 137: 1. Pastorale
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ace847dc500028bdf3d7fac446e28efddb88ff84894fd59d1f68c925c2577c3. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/DEF058903241.
Sonata for Flute, Viola and Harp, L. 137: 2. Interlude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57109c88ac6de39be0d846756aaa2ac002d489448836431d01a2748f36cdefd. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF058903242.
Sonata For Flute, Viola And Harp, L. 137: 3. Finale
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x688aaf92400a78b691a402b6f042485483985d3ba4fd14b58e679d9a34246c88. 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/DEF058903243.
12 Chansons de Bilitis, L.90: 1. Chant pastoral
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c18b0234536f427e8dc2540b688a15853089b9e547c9dea8b2174b95349984. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/DEF058930501.
12 Chansons de Bilitis, L.90: 2. Les Comparaisons
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11be20894a9e40d0585205831e049876b381b900ee6ea99216653e850aadf5a. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/DEF058930502.
12 Chansons de Bilitis, L.90: 3. Les Contes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362455de2508a188f0a311268e3c7ac57d364f611444d4693bd1d3c2a0ecf7a5. 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/DEF058930503.
12 Chansons de Bilitis, L.90: 4. Chanson
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9362c26ed73e87f949063ed1d5800acb5c65720af6ba52e37ff6c13ed6d3d9d. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DEF058930504.
12 Chansons de Bilitis, L.90: 5. La Partie d'osselets
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa527ea1d47d40c28eabdc20ae9d2ca0059533901c298d34889fa168cb52037. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DEF058930505.
12 Chansons de Bilitis, L.90: 6. Bilitis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3171ceed7263d7327adebdfae618896d4091355fd1ebcb6ce2e1ca5e25217ee. 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/DEF058930506.
12 Chansons de Bilitis, L.90: 7. Le Tombeau sans nom
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ca9a746e1831d65c5f8bba19f424434540fe5d2498758ac91aa164091144aa. 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/DEF058930507.
12 Chansons de Bilitis, L.90: 8. Les Courtisanes égyptiennes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd1ea60af18b06c99396e487bbafc0d6c24151c9db54b0ce619bbaece151a79a. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF058930508.
12 Chansons de Bilitis, L.90: 9. L'Eau pure du bassin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe427c29c441c3757f8b18593a2a7f329ff4b73a90f2b2b9207d96df55072c008. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/DEF058930509.
12 Chansons de Bilitis, L.90: 10. La Danseuse aux crotales
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80215865736652ea42255324a074606571afe2a38b1523bc27131ebf5ec85beb. 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/DEF058930510.
12 Chansons de Bilitis, L.90: 11. Le Souvenir de Mnasidika
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefe9402fa4cbbf6be09d09e3bb0666b37fb5c068bd9233be874cf7ec2b1c841c. 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/DEF058930511.
12 Chansons de Bilitis, L.90: 12. La Pluie au matin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c7a6ca966edd4f018bbd1406b92466ca8d43b0dfb6cc00525aaa99eb1dc60d. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DEF058930512.
3 German Dances, K. 605: Organ Concerto No. 6 in B-Flat Major, Op. 4, HWV 294: III. Allegro moderato (Transcribed for Harp and Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3152c75c3e248bac2a9517e18bf50793c337bae4dfb95b27c9a7d2d06c9e9c6. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/USSM10407173.
Scherzo from A Midsummer Night's Dream, Op. 61
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cceb0fa4e51213a6a0cea097de98af874388b409cbe062b9843283fd798f7fd. 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/USSM10015036.