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 0xe3cf3ebde566eab96e136fb95c02d5241fa8ab5f212424eaa812a4c9d5926176. 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/a978e764-f723-462b-be35-cabd2e2b1429.json and https://artists.proofprofile.net/proofs/artist/a978e764-f723-462b-be35-cabd2e2b1429.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
André Campra: Motets pour Notre Dame de Paris
Les chemins du baroque, Vol. 2: Mexico-Versailles – Vêpres de l'Assomption
Beautiful River: Songs of Refuge, Love & Devotion
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 0x0c481949bc11c71219082d197a13d0177ffebdfeb62c84c17696ec36349d16e0. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USRUF1010064 — a six-check JSON result.
Songs of Youth & Pleasure: II. Pluck the Fruit and Taste the Pleasure
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb882a4b9f2a6ec60faece036d1d23d7baca753b48b0e9452d2d70adecebab9e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEX1624020 — a six-check JSON result.
Songs of Youth & Pleasure: IV. Hey Nonny No!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a624c1332357037ced9fe2e9a246f6ca77a2e4900cb99cf0c1bc55725b206e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEX1624040 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99ed950094983f7192957518df12688c9c9c724b914caa259daafd1c845fc00. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEX1624050 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b823da7339f14c2d2e20e508ac168d729c212d8480830aa053a904b4566ecd4. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEX1624060 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x163229f9c0176210cac56a65a05b29bb273e501553e8ae9ffefa7b71eb9f0ca5. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEX1624070 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb47f8df0cab7f61d4c29a02856be2ba52c492dab223d11da5250ed4b0a52432. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEX1624080 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25bf6f4ff997babb0c3d0d366582004d8c023577f60355113f15fcdf4f3327c5. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEX1624140 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5798af0574a1154d9e71fdd855cd1968c46353f543bd8bf46a40123c9410b1a. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEX1624170 — a six-check JSON result.
Il mito dell'opera: Dino Borgioli (Recorded 1923-1930)
Singers of the Century: Joan Sutherland – The Art of Coloratura (Remastered 2016)
Mozart: Violin Concertos - Arvo Pärt: Mozart-Adagio
Violin Concerto No. 1 in B-Flat Major, K. 207: I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x395ee11aab221f635b617428f81c2e78a3f985fa2cb9a43311ca4866b390c832. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBYDS2400466 — a six-check JSON result.
Violin Concerto No. 1 in B-Flat Major, K. 207: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a71ccf7282e4af62ed96205a1153d20a4af3167ade88070b478ed7b2b7f2430. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBYDS2400467 — a six-check JSON result.
Violin Concerto No. 1 in B-Flat Major, K. 207: III. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb1a11d1be8d5cb544a400810dcdb726c57838abe074578807bffa2894a69a63. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBYDS2400468 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b8652060763cc2852901f2881ff45a5fdb5e8f1e111955b215322d932f7042. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBYDS2400469 — a six-check JSON result.
Violin Concerto No.2 in D major, K.211: I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807656bcaf2e920921b62083792a6cc644e2f6dc5769f0f1a23fc5dd1dba06be. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBYDS2400470 — a six-check JSON result.
Violin Concerto No.2 in D major, K.211: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a40283fa63262eaa181e834a7f31740a841c5491f9bb58ff07022dd761f4dbe. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBYDS2400471 — a six-check JSON result.
Violin Concerto No.2 in D major, K.211: III. Rondeau: Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1b1dc5609dd6e8f6469537d0231794aa0bb88248661cb5bdfb28b2cfe80259. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBYDS2400472 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b0dce02eae8d24811f44ca75836fb18e25d1437d1632c3934ff282216ac2099. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBYDS2400473 — a six-check JSON result.
Cantigas de Santa Maria: No. 23, Como Déus fez vinno
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacaef0b5afbbbb9d36643e39f10d87458b74448fd227f251b709cbd0088cdfd9. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITA130300168 — a six-check JSON result.
2016 Illinois Music Educators Association (ILMEA): Honors Chorus & All-State Chorus [Live]
2016 Florida Music Educators Association (FMEA): All-State Elementary Chorus, All-State Middle School Treble Chorus & All-State Middle School Concert Chorus [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5389078816dedd21ca7b4814301a2cc6a51cea6030a3f14323468c64d478c202. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USVZX1604702 — a six-check JSON result.
Music for Trumpets, Strings & Organ from Before 1700
The Central Philharmonic Orchestra Plays Popular Chinese Melodies
Holst: The Planets, Op. 32 - Schoenberg: Verklärte Nacht, Op. 4 - Bartók: Music for Strings, Percussion & Celesta, Sz. 106 - Loeffler: A Pagan Poem, Op. 14
Singers of the Century: Franco Corelli, Vol. 2 — Young Hero of Italian Opera (Remastered 2016)
Orchestra Sinfonica Nazionale della RAI di Torino
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64817357f40f6da3e1625b6f9b9032ff1e1fc7a926a24aaef8acf460fbaca34a. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEL111600132 — a six-check JSON result.
Il mito dell'opera: Alessandro Bonci (Recorded 1905-1926)
Orchestral Music - Wagner, R. / Verdi, G. / Mozart, W.A. / Mendelssohn, Felix / Mascagni, P. (Portrait of Carlo Sabajno, Vol. 1) (1905-1920)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d42b2c33a1ce6d2b9df56fe16d067ad7bb39b0609b851cc3edd4039312aa4f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTAZ2347030 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33fbf4b9bfad374a892e2c00228bc3ab68220e09c6af4904305ed325481532a9. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTAY2365245 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d7af60cc5e702c9b6440ea35300b0673e740f325f504a359681dbc28cf38bd. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHNB2338690 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4bcdd6218806ab92ac24521a4e96a943f22f762e0c84aee2f19a74ec9a1e54. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFZ72347236 — a six-check JSON result.
Orchestra del Teatro Comunale di Bologna
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389835b056cbf0a00fbdb900d28e24ce5cce8673eb502e082d6c77c9217729f7. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078810720 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389835b056cbf0a00fbdb900d28e24ce5cce8673eb502e082d6c77c9217729f7. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078810720 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389835b056cbf0a00fbdb900d28e24ce5cce8673eb502e082d6c77c9217729f7. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078810720 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867962ba183c65357562f25103c51463e54adf6e6d70e7dcba6b1432bcb25221. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX290101040 — a six-check JSON result.