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 0xd03a0399ef8a32cccf93b3f98f4cd9e7e4f9fb78778c9deeaac066427f6da267. Chain 2 (Bitcoin): anchored in block 953780 (2026-06-15T12:02:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d42c8c98-d835-497c-8a3f-5c56f46d978e.json and https://artists.proofprofile.net/proofs/artist/d42c8c98-d835-497c-8a3f-5c56f46d978e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Transcriptions & Paraphrases for Piano (Arr. F. Noack)
12 Études d'exécution transcendante, Op. 11: Nuit d'été in E Major
Lyapunov: 12 Études d'exécution transcendante
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 0x51f3b577f8fdb77247a27d3e6a90a8d0ab225438920bf9d471c09dcb19a346c1. 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/FR3Z52000072.
12 Études d'exécution transcendante, Op. 11: Tempête in C-Sharp Minor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x607d5fccf5693287d78cbab65d1ca5af86188630a82aca0de4491d139e67d437. 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/FR3Z52000073.
12 Études d'exécution transcendante, Op. 11: Idylle in A Major
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1a4ef2271fdfb9913b67a234e925f361a86b85fa0e6b69a2088fd2f7b0a6a4. 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/FR3Z52000074.
12 Études d'exécution transcendante, Op. 11: Chant épique in F-Sharp Minor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7616e108a2dc043cfb6672b72cad7a8236254d58913f0a867b9a02a82eacdd69. 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/FR3Z52000075.
12 Études d'exécution transcendante, Op. 11: Élégie en mémoire de Franz Liszt in E Minor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59a7b1272bb7686ec09634d201ebad62970748c93fe033771381a8a9e8157a24. 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/FR3Z52000079.
12 Études d'exécution transcendante, Op. 11: Berceuse in F-Sharp Major
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4759f17f552b71f27327af79a3246e96cbf68b274494fd8f2f7fcffb52df3cd2. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FR3Z52000068.
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
12 Études d'exécution transcendante, Op. 11: Rondes des fantômes in D-Sharp Minor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20aeec2f97a0b7d601bb214f222209287021069cae81f0efa64ed424e4221cf. 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/FR3Z52000069.
12 Études d'exécution transcendante, Op. 11: Carillon in B Major
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc7cced5788cfc7961a1a91992a3cedf8d5bb9bd07c689bfe50039bc25ad072. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR3Z52000070.
12 Études d'exécution transcendante, Op. 11: Térek in G-Sharp Minor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac9eacf87566188a6cd01e4559b54d6ca3d4515d3bce7724e8c366790f1f3cb. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/FR3Z52000071.
12 Études d'exécution transcendante, Op. 11: Lesghinka in B Minor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b8ec9fec8b9d2851192ac7de11e375d8a9c472383882abf1f9e7266d5ee4e7. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FR3Z52000077.
12 Études d'exécution transcendante, Op. 11: Rondes des sylphes in G Major
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af81f8f59812b6dce98c3514a99d8d95b0db2c0a1173602039fd6ba78984683. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR3Z52000078.