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 0xe3cf3ebde566eab96e136fb95c02d5241fa8ab5f212424eaa812a4c9d5926176. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). 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, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c481949bc11c71219082d197a13d0177ffebdfeb62c84c17696ec36349d16e0. 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/USRUF1010064.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEX1624020.
Songs of Youth & Pleasure: IV. Hey Nonny No!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a624c1332357037ced9fe2e9a246f6ca77a2e4900cb99cf0c1bc55725b206e. 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/SEAEX1624040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b823da7339f14c2d2e20e508ac168d729c212d8480830aa053a904b4566ecd4. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEX1624060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x163229f9c0176210cac56a65a05b29bb273e501553e8ae9ffefa7b71eb9f0ca5. 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/SEAEX1624070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25bf6f4ff997babb0c3d0d366582004d8c023577f60355113f15fcdf4f3327c5. 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/SEAEX1624140.
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 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/GBYDS2400466.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBYDS2400468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b8652060763cc2852901f2881ff45a5fdb5e8f1e111955b215322d932f7042. 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/GBYDS2400469.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBYDS2400470.
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 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/GBYDS2400471.
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 (2026-07-22T19:33:37Z), 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/GBYDS2400472.
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
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBYDS2400467.
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 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/ITA130300168.
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]
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 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/DEL111600132.
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 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/QZTAZ2347030.
Orchestra del Teatro Comunale di Bologna
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389835b056cbf0a00fbdb900d28e24ce5cce8673eb502e082d6c77c9217729f7. 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/GBF078810720.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078810720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389835b056cbf0a00fbdb900d28e24ce5cce8673eb502e082d6c77c9217729f7. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GBF078810720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867962ba183c65357562f25103c51463e54adf6e6d70e7dcba6b1432bcb25221. 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/FRX290101040.