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 0xd0e6d5185e40c572a6515a7bcc18247cecaf3d7ad603c20a06d6d0c058edfc8f. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8afdd0a1-d569-466b-a6de-fa6f208a773f.json and https://artists.proofprofile.net/proofs/artist/8afdd0a1-d569-466b-a6de-fa6f208a773f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Médée, H. 491, Prologue: Air et trio. "Le ciel dans vos vœux s'intéresse"
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 0xf6193b97c6c6331d2fcdc32bd1fe1b76217ec6797e3fe1d5bf9262cbc56275c4. 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/FR50X2302005.
Médée, H. 491, Prologue: Duo. "Voir nos moutons dans la verte prairie"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd897dff29c776889ea6497b10d9584e2ddf4e5fabaee0e3d23f4481656d3c5. 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/FR50X2302011.
Tarare, Acte II, Scène 8: Grande marche « Prêtres du grand Brama ! » (Arthenée, chœur, Elamir, Altamort, Atar)
Les Chantres du Centre de Musique Baroque de Versailles
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x913feef50d7d176ec4174047295794f17fed8e1fdea223bcc4366832227578bb. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FROV61820827.
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
Tarare, Acte II, Scène 7: « Sur un choix important le ciel est consulté. » (Arthenée, un prêtre, Elamir)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a456787ad7e42784b1380f4c65ce3e3777f248f2c69e2ad86f2899c6fc72441. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/FROV61820825.
Cadmus & Hermione, LWV 49, Prologue: Hâtez-vous (Palès, Mélisse, Troupe de Nymphes, Troupe de Pasteurs)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6719f738847182214fb10889a6a4ed139b4e780aca170520af82feb3ab48bbad. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR9W12105770.
Rameau: Achante et Céphise, Act 1: "Que la sympathie a d'attraits !" (Une Fée)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a7dc3c39fd386b050cae2e28b174854598f2a7753b632570f479d1be5fba4b1. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/GBAYC2101010.