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 0x38577ea3f49035a7e7e4cec9922098d0721c64c290428affb79e2213300e0cea. 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/028f8c57-58ec-4be4-816d-6c67b77a7760.json and https://artists.proofprofile.net/proofs/artist/028f8c57-58ec-4be4-816d-6c67b77a7760.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mozart: Clarinet Concerto & Piano Concerto No. 25
Mozart: Clarinet Concerto in A Major, K. 622: II. Adagio
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 0xfd65f4320e37c6cdd57ae1d8191dd2eb244df0f6c7a596e4872ccea7b459936d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBAYC9006790.
De Vito, Gioconda: Earliest Studio Recordings (1947-1949)
Giuseppe De Luca: Golden Jubilee Concert
Georges Bizet: Carmen (Οpera in Four Acts) Vol. 1
Georges Bizet : Carmen (Οpera in Four Acts) Vol. 2
Bizet: Symphony in C Major & L'Arlesienne Suites Nos. 1 & 2
Wagner in Stockholm: Recordings 1899-1970
Borodin: Prince Igor, Act II: Polovtsian Dances (Excerpt)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db9ea18ad041fec5222fff743aaccbcf9696003503abdd1beb0046fa91681ea. 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/GBAYC8701433.
Clarinet Concerto in A Major, K. 622: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d2de214c9fe20eef7840877880e2dd3911246330c5e8847aa957ca5c6bdeb0. 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/GBAYC9102037.
Carmen, WD 31, Act I: No. 5, Habanera, L'amour est un oiseau rebelle
Choeurs National de la Radiodiffusion Française
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf91c8e2019d7e2797e183abee72b61203b3d01d6e7e60b432013f9c929066f54. 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/FRZ110601867.
La bohème, Act I: Che gelida manina! (Rodolfo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5244cfd05777fa72ef0cf646f524246a47ead7a4d73da3fd798b25d67dcd48c5. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/GBAYC0200176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf91c8e2019d7e2797e183abee72b61203b3d01d6e7e60b432013f9c929066f54. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/FRZ110601867.
Mozart: Clarinet Concerto in A Major, K. 622: II. Adagio (Excerpt)
Jack Brymer/Sir Thomas Beecham/Royal Philharmonic Orchestra
The Most Peaceful Classical Album in the World...Ever!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494b2d2920fd6058ad8a7512e6c1d79fc25a446f3df825578d392d6ecbaa15f7. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/GBAYC9100887.
Messiah, HWV 56: Part II, Scene 7: Hallelujah
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c9101a8b7149619f9595d25b98a56029910834431d041593cf42551047f388d. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/USBC15900279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17cdbd47c4634c10a942440684bf89ce0c720d8f0cc1a44e92eadb36a7ec4575. 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/GBAYC0101143.
Symphony No. 7 in A Major, Op. 92: II. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1843588df0f39aad0d8d69c394de583fc6bee058da648534a33a1289c3e7eb63. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/GBAYC8905954.
Carmen (2000 Digital Remaster): Récit & Habanera: Quand je vous aimerai?...L'amour est un oiseau rebelle
The Orchestra National De La Radiodiffusion Francaise
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d4683a28c1ebeb95646ae2c8f0ac151895d74de6275a642515fe6111cf5329. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/FRZ110000085.
Anonymous: English National Anthem "God Save the King"
A Classical Coronation. Music for a Royal Celebration
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee3297c0c6fa235b9057b76cb82dadfecdb000d952c48c92f041e4e1edf63bb. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/GBAYC1002764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17cdbd47c4634c10a942440684bf89ce0c720d8f0cc1a44e92eadb36a7ec4575. 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/GBAYC0101143.
Handel: Solomon, HWV 67, Act 3: Sinfonia. "The Arrival of the Queen of Sheba"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a649d02328f0a11f041e96b7b7587421d3a60de68ea93737cc04a3a1bd8aa9. 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/GBAYC0500238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd65f4320e37c6cdd57ae1d8191dd2eb244df0f6c7a596e4872ccea7b459936d. 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/GBAYC9006790.
Carmen, WD. 31, Act I: Quand je vous aimerai?...L'amour est un oiseau rebelle
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d4683a28c1ebeb95646ae2c8f0ac151895d74de6275a642515fe6111cf5329. 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/FRZ110000085.
Scheherazade, Op. 35: II. The Story of the Kalender Prince
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e54a8f039bf74bb78f945efda71f2df5f6576f13259ff69644e8587e6d8bac. 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/GBAYC9801245.