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 0xad2d9013e3287e314b927a72f7ddb083e728709bce8a219a64cd0f49cd04f11d. Chain 2 (Bitcoin): anchored in block 954618 (2026-06-20T23:05:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c818effa-de93-451e-9b33-df022bcb451c.json and https://artists.proofprofile.net/proofs/artist/c818effa-de93-451e-9b33-df022bcb451c.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
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 0x159c851b5598baabc516eac0072190afe106c57eb54f463c0b43ba21c823c337. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331600175 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99cbdad8ee6accd610e9d8f03277a4c94489bef6901f3c1b8153b5bda5a37e8. 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/NLY331600189 — a six-check JSON result.
Mouquet: Complete Music for Flute and Piano
5 Pièces brèves, Op. 39: I. Andantino in A Minor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c6eaeebe0566c03d53bbc86542f535ec19e7bea48d4191c5d527337b629b0d. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331709011 — a six-check JSON result.
5 Pièces brèves, Op. 39: II. Allegretto in G Minor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ef273861e52bc43c1ab7400484358942417a28ed746b9c3a99dcd473f09f27. 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/NLY331709012 — a six-check JSON result.
5 Pièces brèves, Op. 39: III. Adagio - Andante in G Minor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25d774d84eec66e890acb5d99017ad0f04cbf815a5a98673756f9fb73b08e05. 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/NLY331709013 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569c398ac204eae320a9ba557c2c448e1dfeb89738027c44c8b82a1ef985a801. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331709014 — a six-check JSON result.
5 Pièces brèves, Op. 39: V. Allegro in D Major
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6db5a3a77f5e006f3fb2ab482f2602cafb53288cc9e197ee8bbc4e3866150a. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/NLY331709015 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1e17b4e513d7212df9a2cf24a4f6725b6b8d7c2c9c926a5c60b503c8c7b1ae. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/NLY331709016 — a six-check JSON result.
Divertissement grec, Op. 23: I. Lydienne
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce7f394d4964087e9c37fd4ca8bc567ac90d96a2aff0f240572e3093ac42468. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331709017 — a six-check JSON result.
Divertissement grec, Op. 23: II. Dorienne
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6112293c6085dbefe31ff55e344bd0608ab5e87339959eb0c72c3276e891385c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331709018 — a six-check JSON result.
Divertissement grec, Op. 23: III. Phrygienne
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63710783f21fba3c76ac053b699a3f2e24ff11ee7c07cff2939ff47ca38ade32. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/NLY331709019 — a six-check JSON result.
La flûte de pan in F Major, Op. 15: I. Pan et les bergers
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaacc289059ebecdb645a3f11db09b3f2db7a2ac1e7fc2f7dfeff502055bbc58. 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/NLY331709022 — a six-check JSON result.
XX Century Works for Flute, Viola & Piano