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 0xdee65c50bf27c4f0836100970a6f6bb2cb386035a1db33d707e7348e1ab538c7. 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/c86a3a20-107d-4b79-b7ec-64b052ce904d.json and https://artists.proofprofile.net/proofs/artist/c86a3a20-107d-4b79-b7ec-64b052ce904d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Caja de Música: II. Nocturnal, Seductive
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 0x83cd8e36fc4fd864a6edda68ce3f966fcb27067f4d3edb96b703a049f657e196. 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/NLE422312002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5892722d5d5c4816d822b8bc5c05690290672936b1e718c814bd108ff105c698. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE422312001.
David Bruce: Caja de Música: III. Tempo di Joropo
Kati Agócs: Northern Lights: V. Aurora Rising
David Bruce: Caja de Música: I. Energetico
p r i s m / Act II: lumee’s dream - Nadia Sirota viola study
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e12df27320810f1019187af6ae7845c48ea2f46e878dcf47f925d48bda5cfe7. 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/USUG12000220.
Octet for Two Clarinets, Harp, Two Violins, Viola, Cello and Double Bass: I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5fe2c3370d0d770a6b2485c77616d29875d7dbdbb2655c8da43bf82403629c6. 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/USASX2460302.
Timbres oubliés (Arr. for Clarinet and Harp by Graeme Steele Johnson and Bridget Kibbey)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdaa965071be415c7d53731c1ba3c4fdca82ee9fd0a6accee5812d59a833a999. 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/USASX2460305.
Octet for Two Clarinets, Harp, Two Violins, Viola, Cello and Double Bass: II. Adagio molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222548067f194d9000fe186ca304b1bd23521eec580afd6ae8f5c1e475372b19. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USASX2460303.
Octet for Two Clarinets, Harp, Two Violins, Viola, Cello and Double Bass: III. Andante; Allegro alla Zingara
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac2d90e6ba2c6dced56931653ddb01cf13fd7c1539a7a62d9eb1d07de0bf9dc. 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/USASX2460304.
Castérède: Complete Works for Flute, Vol. 1
Flûtes en vacances: III. Flûtes rêveuses
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d9b2d3cbf09d6479584ed92ccf1aed1aaa39c8766e177e24324983ff8747de9. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/HKI191906009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17cd8efd6fdaf9770df6c55ce1b1591325251cb329be7a5755842d92ede2a08c. 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/HKI191906010.
Octet for 2 Clarinets, Harp & String Quintet: II. Adagio molto
Elliott Carter: 103rd Birthday Concert (Live)
Castérède: Complete Works for Flute, Vol. 2