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 0x0b9e2b23d3174450a000df62a02115b593913a66a47c1af0ce7942712c79f0ac. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/709b8931-06e6-44d6-a1e8-fc2afa0160e6.json and https://artists.proofprofile.net/proofs/artist/709b8931-06e6-44d6-a1e8-fc2afa0160e6.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Pièces pour la harpe: Handel, Bach, Rameau, Mozart, Chopin, Liszt...
Daquin / Arr. Géliot: Pièces de clavecin, Suite No. 3: I. Le coucou
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 0x8d54a2caa53960a55f6afcdd2ae5e9e2aec1278208c1cec769d1eedc614c3b89. 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/FRZ112200197 — a six-check JSON result.
Handel / Arr. Géliot: Keyboard Suite in E Major, HWV 430: IV. Air and Variations "The Harmonious Blacksmith"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc68576a7c4d604767f4204b40c908250d3355b6f1bf10e19ac847e2c0328a54. 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/FRZ112200198 — a six-check JSON result.
Mozart / Arr. Géliot: Piano Sonata No. 16 in C Major, K. 545 "Sonata facile": I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea648dbae0c8be70f9672ba2d599f40475941732a091aa88c64b4b8329048ccf. 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/FRZ112200199 — a six-check JSON result.
Debussy / Arr. Grandjany: Suite bergamasque, CD 82, L. 75: III. Clair de lune
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba698d719dad78015a5ac071e8c62017acde2fc5d74d1a4d07a250ff5f80088. 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/FRZ112200200 — a six-check JSON result.
Satie / Arr. Géliot: 3 Gymnopédies: No. 1, Lent et douloureux
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa981121b4400649520dbe0a31a100baea77c8cc560b18d1f335d1ef5a7b08d01. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/FRZ112200201 — a six-check JSON result.
Daquin / Arr. Géliot: Livre de pièces de clavecin, Suite No. 2: VI. L'hirondelle
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f643b3d5ca74b5ab477807d7dc8736b3a2ffe1a7b544d5ec22e89c6ff3f2fac. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ112200202 — a six-check JSON result.
Rameau / Arr. Géliot: Troisième livre de pièces de clavecin, Suite en sol: VIII. L'Égyptienne
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x893f8e6df084a2ad0906519d4d7033ed2278efb59aad1ee624b5ee7eaac15420. 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/FRZ112200203 — a six-check JSON result.
Falla / Arr. Grandjany: La vida breve: Danza española No. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719bdfd628a1133f8526f548c150d2b03fa984acd20d61e3aba6d4613817f4ba. 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/FRZ112200191 — a six-check JSON result.
Fauré / Arr. Hasselmans: 3 Romances sans paroles, Op. 17: No. 3, Andante moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f2501a10b70e2498634037b545d7451b27b9c1cd50f89e0467f2d56b9bc45d. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ112200192 — a six-check JSON result.
Debussy / Arr. Renié: Arabesques, CD 74, L. 66: No. 1, Andantino con moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39060acb233da2b1f01b4a95dc54abf61ac9fb88497cf7613354d4a4e5a14f7. 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/FRZ112200193 — a six-check JSON result.
Liszt / Arr. Renié: Liebesträume, S. 541: No. 3, Oh Lieb, so lang du lieben kannst
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c1a0aca59fb7ca8aedb3947cca84e9969ff26e48e65dcff7d190e85256f3e1a. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/FRZ112200194 — a six-check JSON result.
Chopin / Arr. de Stefano: Nocturne No. 21 in C Minor, Op. Posth.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302322c9721883d3313f42085f0e76c47260cfaa944014cccc386632e0a5c843. 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/FRZ112200195 — a six-check JSON result.
Bach / Arr. Géliot: The Well-Tempered Clavier, Book I, Prelude and Fugue No. 1 in C Major, BWV 846: Prelude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260218b5240c4f691b6a0e9143f296bea5091449fa9e33012be5c79d6b336184. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/FRZ112200196 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f2501a10b70e2498634037b545d7451b27b9c1cd50f89e0467f2d56b9bc45d. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/FRZ112200192 — a six-check JSON result.
Recorder Sonata in G minor, Op. 1, No. 2, HWV 360: III. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990926d877b880b9011ae246a5137fe2d431fa36335fb43016c3cc0cad368e31. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRUM71601852 — a six-check JSON result.