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 0xa7f62a7b1a5cbfcee4abbb71a98137a96eb5dc3ad045891b3d21ebb8dcf962c8. Chain 2 (Bitcoin): anchored in block 953670 (2026-06-14T18:07:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/58149c86-f295-4cea-81b8-6ba391ef067f.json and https://artists.proofprofile.net/proofs/artist/58149c86-f295-4cea-81b8-6ba391ef067f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Chill with Mozart (Enjoy the coolest melodies of Wolfgang Amadeus Mozart)
Boesmans: On purge bébé ! Opera in One Act
On purge bébé !, Scène 2: Îles qui bordent le nord de l’Écosse
Stravinsky: Le Rossignol, Act 1: Introduction
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 0x3ed9148cedc52e5d9fd5b9bd8a0adfd9f6b48cd3a4838547c001cd442d5ca111. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR4KC2304001.
Stravinsky: Le Rossignol, Act 1: "Porté au vent, tombant au loin" (Le Pêcheur)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d4db5270fc125b95faaffcc1628038083a18b68b856062e42c7f0726de770a. 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/FR4KC2304002.
Stravinsky: Le Rossignol, Act 1: "Ah ! Ah ! Ah !" (Le Rossignol, Le Pêcheur)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd43902431e8ada87e176f3e444d209dc800677737424ceb86413848e0a3bab. 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/FR4KC2304003.
Stravinsky: Le Rossignol, Act 1: "Voici l'endroit, près de ces arbres" (La Cuisinière, Courtisans, Le Chambellan, Le Bonze, Le Rossignol)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c248a102deb8ca87d39ebaa3536ccad755962298dc595052cffa74a6066ac9. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/FR4KC2304004.
Stravinsky: Le Rossignol, Act 2: Chanson du rossignol. "Ah, joie, emplis mon cœur" (Le Rossignol, L'Empereur, Courtisans, Le Chambellan)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad86ac1d7a3188e2e59e915005277e3914691eb53ec5281d7da8193e07e70ffb. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/FR4KC2304008.
Les Indes galantes, RCT 44, Prologue: Ouverture
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120fde7d1408b97e82e4da99f841dfc2a364f99d2e3e59c5ae80ab3e30f3e75d. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ES7891802501.
A Guided Tour of the Romantic Era, Vol. 13
Pierne, G.: Sophie Arnould / Ballet De Cour