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 0x58e19c16dfd9c9852576b8a1fee8b3f54a6915703c3f3c79d637045814da61bb. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4ecf817e-4e2c-46ed-aa95-3ac006a0ee57.json and https://artists.proofprofile.net/proofs/artist/4ecf817e-4e2c-46ed-aa95-3ac006a0ee57.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Das Rheingold, WWV 86A, Scene 1: Vorspiel
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 0xb4927612123960ff2aa959e5982e1ebd65844c6d0497f22840d62e6ab299434d. 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/HKI191518501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603d2785ef639877f9e66290a66b6f41266b95843b9fae6bfc187630a8001019. 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/BEE020291201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0527a4e1977e4684dce343ef7ef1891e3ce657edb2c9fcda64561b411cf39c0b. 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/BEE020291202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4106ea5f72d407b03637353b4ed8da4b78c393892ccaac82ecadf2167b7c08f5. 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/BEE020291222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3737821eee0c5e254cf483d622768f290ea25a93b34917a61a3d9e68f248c01b. 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/BEE020291226.
Passion, BWV 245 - Part One: No. 7 Arie (Alto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61069e0612da209fa95a830297b1b7b2cba1677d12707ef13f17ed9e65936776. 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/BEE020291211.
Passion, BWV 245 - Part Two: No. 19 Arioso - Bass
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc03a3d26f302d4cd1532ed682076b6db6483bd31266a07ca28ac46cc878eee. 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/BEE020291231.
Passion, BWV 245 - Part One: No. 10 Rezitativ (Evangelist - Ancilla - Petrus - Jesus - Servus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66db12a812272399b4b6f4bf098d0e1d155b8c0279f2cf1ebf4cefc076e428b0. 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/BEE020291214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e89b771bb74634e3904def8d5c9c0784c0551369c477f86f3b7852bb68f0cd. 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/BEE020291239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ace2804837b1bcaea948f04249abfbe7132cacbed5bd25b9ee019a075ec9cd. 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/BEE020291220.
Passion, BWV 245 - Part Two: No. 23d Chor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a7af5ea5ce93f970f3a77add9ae6a0853ef97b32c51333ba99463151106c37. 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/BEE020291243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9272c5c4518b6ffc636445492a2937b68e6aeed793c57c3dd03379f4b30b57af. 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/BEE020291248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd6b8967a17fdd3df27e50709a00ae8c8c471a0de6a7b194e56f0b43f26caa2. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/BEE020291204.
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 0xb151318f73778b6949a18d723cb436f9df5e52109b1bf79c7142fcec264926b6. 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/BEE020291208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab029c2e9f922b1035b26a102102fecfeaf1de34cf883a8877d14d2f609a7f4. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/BEE020291228.
In Flanders' Fields Vol. 97: De Kinderen der Zee
Ave Maria - Les Plus Beaux Ave Maria Et Chants A La Vierge (The Most Beautiful Ave Marias and Songs To the Virgin)
Ellens Gesang III (Ave Maria!), Op. 52, No. 6, D. 839, "Hymne an die Jungfrau (version for choir): Ave Maria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7621dc3eba4dd1cd13ba680e9fc1f76d6a14db7df0a300616ec6355799ac9d. 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/HKI190567009.
Richard Wagner, Der Ring des Nibelungen, Das Rheingold
Mozart, W.A.: Nozze Di Figaro (Le) (The Marriage of Figaro) [Opera]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e7ab50132ac98a672cca9a61df12435968db70e83019b853f8491f4cb1dac3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DECP69806001.
Le nozze di Figaro, K. 492: Act I Scene 4: Via resti servits (Marcellina, Susanna) - Scene 5: Va la, vecchia pedente (Susanna, Cherubino)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf561b8e2eb59ba4a8f1a7bac51d8ed431eff0bba9857b4b78ea15aeb92b6a24. 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/DECP69806006.
Le nozze di Figaro, K. 492: Act I Scene 1: Duet: Cinque … dieci … venti … trenta (Figaro, Susanna) - Recitative: Cosa stai misurando (Susanna, Figaro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17969fe33503461705086200e03fcea5a25dcff77b988ba54b5bc1cc29c830d2. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DECP69806002.
Le nozze di Figaro, K. 492: Act I Scene 1: Duet: Se a caso Madama (Figaro, Susanna) - Recitative: Or bene: ascolta (Susanna, Figaro) - Scene 2: Bravo, signor padrone! (Figaro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa25f7f2c54d7ebced7234d9768e9fc23229ad60147ca352cd1c4e365212b371a. 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/DECP69806003.
Le nozze di Figaro, K. 492: Act I Scene 2: Cavatina: Se vuol ballare, Signor Contino (Figaro) - Scene 3: Recitative: Es aspettaste il giorno (Bartolo, Marcellina)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf76eec3711b221776bdcec56b15a56dfd6eb2c2f4b8ef95ee00c9d3acb01c9. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/DECP69806004.
Le nozze di Figaro, K. 492: Act I Scene 8: Aria: Non più andrai, farfallone amoroso (Figaro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1fde59de3512cc868c939d25e904de92e981a3d17feb1adcef0ad99464b2382. 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/DECP69806010.
La Petite Bande (Sigiswald Kujiken, 70th Anniversary Edition)
Ave Maria: Madonna Mystica - Bach, J.S. / Handel, G.F. / Schubert, F. / Bruckner, A. / Brahms, J. / Liszt, F.
Debussy & Fauré & Hahn: Mélodies de Verlaine
In Flanders' Fields 19: Songs and Piano Music by Lodewijk Mortelmans (2019 Remastered Version)
In Flanders' Fields, Vol. 84: A Bouquet of Forgotten Flowers
Pergolesi: Livietta e Tracollo - La Serva padrona
Fiocco: Missa Solemnis / Ave Maria / Homo Quidam
Bach - Glazunov - Ligeti - Handel - Bartók: Jacques Pache, passeur de souffle, de beauté et d'exigence, Vol. 3