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 0xf7dacee13ee79ad59ee020af6f0d5997cd5a7789b646a037214e3abe13ef3878. 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/9450c216-c76e-4886-9ec9-955e20a25a11.json and https://artists.proofprofile.net/proofs/artist/9450c216-c76e-4886-9ec9-955e20a25a11.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Omaggio a Leopold e Wolfgang Amadeus Mozart
Symphony in D Major, D. 13 "Non è bello quello che è bello mà quello che piace": I. Allegro
Orchestra da Camera del Conservatorio di Mantova
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 0x8b1bd5949e210625602b4f3eab566656b4a480965f66fc1737fa7229ffec03f8. 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/ITD542400196.
Symphony in D Major, D. 13 "Non è bello quello che è bello mà quello che piace": II. Menuett
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a92cad5b055bc94f77cc6ea6d19e004108d470f47f13e2bf90e5d071ba9ef9. 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/ITD542400197.
Symphony in D Major, D. 13 "Non è bello quello che è bello mà quello che piace": III. Prestissimo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde076c46d5216abec11bd06a2c97b08ea1a39bef7887e435621ad733679842c. 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/ITD542400198.
Symphony No. 1 in E-Flat Major, K. 16: I. Allegro molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8934064441d35f7c2f05d9b89bebe114a7b9c5011eb1ad6bf62d759622b31a29. 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/ITD542400199.
Symphony No. 1 in E-Flat Major, K. 16: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd8f07830859b7b090db3e3291142c6b7acf8155bb94dee216582bb250b87cdb. 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/ITD542400200.
Symphony No. 1 in E-Flat Major, K. 16: III. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e5bd86a45d250a55b8989f931527ab78c018d5c08bc654752c41b981423a2b. 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/ITD542400201.
Symphony No. 9 in C Major, K. 73: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819a763766177450aa24ad26189534c99e6622bc256797b13fa528dd2a6d9835. 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/ITD542400202.
Symphony No. 9 in C Major, K. 73: III. Menuetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01acbd21f83ff264fd31e8754e4b41a1232027dfd63ae404509a4819042cfd7c. 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/ITD542400204.
Symphony No. 9 in C Major, K. 73: IV. Molto allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x337be94c8b7ea1818b7372dba5333ac890911ea59377f0c707b7323781d45e51. 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/ITD542400205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc007cdfe00c09af33774464fae77ed17ca7efce16a900c4b693bf56c76b49f38. 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/ITD542400206.
Symphony No. 14 in A Major, K. 114: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616db8bf028a6e8c8941c55ea5fa423250fcc9d07b628c08c2af534ff90bfc82. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/ITD542400209.
Symphony No. 14 in A Major, K. 114: IV. Molto allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c108d847fb35e4d77599b2ac6732e535dcbdabd1eb42182cc27bd0ac0c5e853. 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/ITD542400211.
Piano Concerto No. 1 in F Major, K. 37: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e8c73e44cfb4a81460a6b3f9b708218aa3ad1eee11448dfeda428e4c9e30d1. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITD542400212.
Piano Concerto No. 1 in F Major, K. 37: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aedc7abb285cad89c80e37c63ea11bfc3e7c9a7aedcee7bbf4fd2de46cd4d45. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/ITD542400213.
Piano Concerto No. 2 in B-Flat Major, K. 39: II. Andante staccato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149429491f0ad81b0b30f1663b5ab19b4696e638cc6c13261013103838ff77e4. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ITD542400216.
Piano Concerto No. 4 in G Major, K. 41: III. Molto allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5dcf3ccf46417b3d26ce26d04a3ae683168a3581edd9225357d7505337aa342. 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/ITD542401024.
Campogalliani: Composizioni strumentali e vocali
Larsson: Concertino for Trombone and String Orchestra, Op. 45 No. 7
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5830a81923d226b598ffea594b400fc7bbacdcd077787bfa09e6e88348169bad. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ITD542400238.
Mozart: Piano Concerto No. 6 in B-Flat Major, K. 238
Mozart: Piano Concerto No. 5 in D Major, K. 175
Mozart: Piano Concerto No. 4 in G Major, K. 41
Mozart: Piano Concerto No. 3 in D Major, K. 40
Mozart: Piano Concerto No. 2 in B-Flat Major, K. 39
Mozart: Piano Concerto No. 1 in F Major, K. 37
Mozart: Symphony No. 14 in A Major, K. 114
Mozart: Oh, temerario Arbace! - Per quel paterno amplesso: Recitative & Aria, K. 79
Mozart: Symphony No. 9 in C Major, K. 73
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819a763766177450aa24ad26189534c99e6622bc256797b13fa528dd2a6d9835. 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/ITD542400202.
Symphony No. 9 in C Major, K. 73: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8c815b6993a25325ede50d68d71311112bc27a973135b5f21326f4e8ea3d955. 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/ITD542400203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01acbd21f83ff264fd31e8754e4b41a1232027dfd63ae404509a4819042cfd7c. 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/ITD542400204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x337be94c8b7ea1818b7372dba5333ac890911ea59377f0c707b7323781d45e51. 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/ITD542400205.
Mozart: Symphony No. 1 in E-Flat Major, K. 16
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8934064441d35f7c2f05d9b89bebe114a7b9c5011eb1ad6bf62d759622b31a29. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITD542400199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd8f07830859b7b090db3e3291142c6b7acf8155bb94dee216582bb250b87cdb. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITD542400200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e5bd86a45d250a55b8989f931527ab78c018d5c08bc654752c41b981423a2b. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITD542400201.
L. Mozart: Symphony in D Major, D. 13 "Non è bello quello che è bello mà quello che piace"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1bd5949e210625602b4f3eab566656b4a480965f66fc1737fa7229ffec03f8. 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/ITD542400196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde076c46d5216abec11bd06a2c97b08ea1a39bef7887e435621ad733679842c. 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/ITD542400198.
Bach: Brandenburg Concerto No. 3 in G Major, BWV 1048
Brandenburg Concerto No. 3 in G Major, BWV 1048: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49eba6286751acacbd49974afdda99171fa972e7c5888c9838bd21e1b15fa164. 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/ITD542400251.
Brandenburg Concerto No. 3 in G Major, BWV 1048: II. Adagio - III. Allegro in G Major, BWV 1048: II. Adagio - Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe3c19f8bdadc04cafd7169205b144d011cc1163b245f7bea1465ba5ad6c120f. 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/ITD542400252.
Piazzolla: Las Cuatro Estaciones Porteñas
Brandenburg Concerto No. 1 in F Major, BWV 1046: IV. Menuetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e07bd35dea06a79456450392f9e28571b3fbbacd0243546bb58992f6793cae. 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/ITD542400247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49eba6286751acacbd49974afdda99171fa972e7c5888c9838bd21e1b15fa164. 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/ITD542400251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe3c19f8bdadc04cafd7169205b144d011cc1163b245f7bea1465ba5ad6c120f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ITD542400252.
Brandenburg Concerto No. 6 in B-Flat Major, BWV 1051: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x610b5718853cb7a269ef5f593637a93b0d75d92e320b37c47404921439e80a02. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/ITD542400259.
Brandenburg Concerto No. 6 in B-Flat Major, BWV 1051: II. Adagio, ma non tanto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766d8f86e2c090e55da4e375763d3f147a6987402cd175d6134ddcc720cf3add. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/ITD542400260.
Brandenburg Concerto No. 6 in B-Flat Major, BWV 1051: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb8b2d84e7a5101e5aa323748307fdffa93fe3cf94cf28b110772094408207c5. 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/ITD542400261.