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 0x32d150761043915fb8c73eea3e875ccbab12b9908164b2fa62491a38b03a8537. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/54e0a018-fb4e-4026-8ebf-a07589ad87ad.json and https://artists.proofprofile.net/proofs/artist/54e0a018-fb4e-4026-8ebf-a07589ad87ad.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Serenade in C Major, K. 648 "A Very Little Night Music" (Original Version for 2 Violins & Bass): I. Marche - World Premiere Recording
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 0xd122ca6acd32d8dc2b8d6b991aa4b8d07317e7fe337dcfde693fe02a1146fb45. 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/DEN962402371.
Serenade in C Major, K. 648 "A Very Little Night Music" (Original Version for 2 Violins & Bass): II. Allegro - World Premiere Recording
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d7bf8fee980a97c94057a48a4275e8269401d9b178f58b5d6771655814890b. 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/DEN962402372.
Serenade in C Major, K. 648 "A Very Little Night Music" (Original Version for 2 Violins & Bass): III. Menuet [I] – Trio - World Premiere Recording
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483e1571f5d638a6d24ef373366febeade8d6b3845a00b0b0fd6dab8c746dc19. 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/DEN962402373.
Serenade in C Major, K. 648 "A Very Little Night Music" (Original Version for 2 Violins & Bass): IV. Polonoise "Boloneso" - World Premiere Recording
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ec19634a623048f6ee67ee6b41658d162118ad14ae396f910355839ca88b9f. 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/DEN962402374.
Serenade in C Major, K. 648 "A Very Little Night Music" (Original Version for 2 Violins & Bass): V. Adagio - World Premiere Recording
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2311f45d6b23dc3370e62c4c5ccdb702afab37bcb9e5e7d518e53ed7c700cd. 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/DEN962402375.
Serenade in C Major, K. 648 "A Very Little Night Music" (Original Version for 2 Violins & Bass): VI. Menuet [II] – Trio - World Premiere Recording
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd85aefce3329ad05d52143a21d15b6855a20cdab56a861cb7123b2cf3e3c9127. 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/DEN962402376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ec19634a623048f6ee67ee6b41658d162118ad14ae396f910355839ca88b9f. 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/DEN962402374.