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 0xb720b6ae313c96735e3f7ef043c5923c6b4e060175bcba0ef133f895e7c139d0. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a2cd2ce7-d9cc-4c15-ae3c-10306a16e040.json and https://artists.proofprofile.net/proofs/artist/a2cd2ce7-d9cc-4c15-ae3c-10306a16e040.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
A Guided Tour of the Baroque Era, Vol. 5
Chefs d'oeuvre de la musique classique française
A Guided Tour of the Classical Era, Vol. 1
Keyboard Sonata in D Major, K.96/L.465/P.210: Allegrissimo
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 0x3ed49eff09574336adee3fa4b61a4fc0ee489ee0efecf8d4b478e283ae80c1e9. 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/HKI190649007.
A Guided Tour of the Baroque Era, Vol. 1
Grétry: L'épreuve villageoise, Act I: Finale. André, tu me l'payras j'en jure
Lully, J.: Armide (Opera Lafayette, 2007)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed31f7f8e0895b8a5b1f96e9de6b3387a72f3b25d2a46dd145ba85129f344e84. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKI190843001.
Armide: Act I Scene 3: Suivons Armide, et chantons sa Victoire (Phenice, Chorus, Sidonie)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c5f04bc64f173895f50ce03bc545ab702fe92c8032afc53ba922ead7090b58c. 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/HKI190843006.
Armide: Act V Scene 5: Le perfide Renaud me fuit (Armide)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c81ab3879480c1c810a7bacae6eaa0f75c8b168ee64e553299204c9c6e83544. 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/HKI190843114.
Armide: Act I Scene 1: Dans un jour de triomphe (Phenice, Sidonie, Armide)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2edc5c93675634fb3269b1e453aba4b253e8f82e6f1591c1145addbceb55361b. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/HKI190843002.
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
Armide: Act I Scene 1: Un songe affreux (Armide, Sidonie)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12dace2233d6eec9eda28d6256aab909adc6ebdce6054b517c24c067e1dfd2d. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/HKI190843003.
Armide: Act I Scene 2: Armide, que le sang qui m'unit avec vous (Hidraot, Armide)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead136e71c5b352ebfbe79e05ef762e15e74b4a55457b708dc0ac400ca4560f3. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/HKI190843004.
Armide: Act I Scene 3: Armide est encor plus aimable (Hidraot, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161e1f30d1de2d24f2f86ee0854cc8339395ee65fa30efa385a040fda0bfd2e4. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/HKI190843005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5fca9ed5306c1d3698d29c20efbf8ecb7dc7e92ca8ae8df1bef2ffe79b2207. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/HKI190843008.
Armide: Act V Scene 2: Les Plaisirs ont choisi pour asile (Un Amant fortune, Chorus, Renaud)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x287de3e7a829f6f66a9c782c272d6179c69c9de75339842a669b2352a8781401. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/HKI190843111.
Armide: Act II Scene 5: Enfin il est en ma puissance (Armide)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d1b0d1936bab6fa7c9d388d75e003f49be25041a92c69a1065a40cedc1611b. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/HKI190843013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c49329d89b1df81e9c552949f3eb553a7519a03e62cc7741fec0511f695b08. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190843014.
Rebel, F. / Francoeur, F.: Zelindor, Roi Des Sylphes [Opera] / Le Trophee Suite
REBEL, F. / FRANCOEUR, F.: Zelindor, Roi des Sylphes [Opera] / Le Trophee Suite (Fouchecourt, H.G. Murphy, Opera Lafayette, R. Brown)