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 0x57e5e9aee36df0ce1730d1905f9a1488e6e112d8bbc347da69724ee3b8c811c4. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/70edf890-7536-4af4-a67d-84c09246bf5b.json and https://artists.proofprofile.net/proofs/artist/70edf890-7536-4af4-a67d-84c09246bf5b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Italian Baroque: The Instrumental Edition Vol. 1
Sonata No. 2 in G Minor, Op. 6: II. Larghetto
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 0xdbffa635e7b81b1878e980fc0109d3fdb9f0bf89edfa69e3d91df5acd48ae800. 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/NLY331605471.
Sonata No. 2 in G Minor, Op. 6: III. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x814a4d5f73761d8fe397c69c0d82c9a15e56c3ff320d799121814b39d1339385. 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/NLY331605472.
Sonata No. 9 in G Major, Op. 6: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x841ccffc79038973cc81fc9488e12d4f665425f715381283c156240c0d3552b3. 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/NLY331605475.
Sonata No. 5 in F Major, Op. 6: IV. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c547e56608dc38c93747d38efc167fed22bc6430ee3f08df9af5a5180676f73. 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/NLY331605485.
Sonata No. 3 in B-Flat Major: III. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e32dad57441db77444516b245f5a5c387a9c5cbb7f38cb6629108d7505b86f. 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/NLY331605492.
Oboe Concerto in D Minor, Op. 9 No. 2: I. Allegro non presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b098f9e470fde3242026811b0923d42ffe45ebaca8bce38e49914d80f4e941. 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/NLY331605494.
Concerto che serve d'introdutione in G Minor: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd75754b146b8b1bc1213f2b817f345c73a39491dbbe39e49504fa873bba932. 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/NLY331504177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff63b9805253ea6fe6cf6e02afaf52000c0362b276bff59c50ccc99a2de06a9. 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/NLY331504183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde27a522ecbd4d85a5a81e4ff6012d9213a07991b97ed8e9b21d2900790697f9. 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/NLY331504185.
Concerto primo in G Major: I. Andante - Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9826ab9347aa55a2ce9cfd1912aed15d255c755a782dec04c41f775c333c5d3f. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/NLY331504169.
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 0x7faccef9abb0bf619f622da58a0b3b10367d8d20582b8a35f8df198663e8cc2a. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), 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/NLY331504170.
Concerto primo in G Major: III. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b7f29d1fe9ed22a51a3af8d2d49b534e3d0bf4da9c29adfe810bdfa7628b3e. 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/NLY331504171.
Concerto quinto in B-Flat Major: I. Grave sostenuto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb803125a51eee953bfb24837204a35e67a2968452c892d57b50f41d157a09552. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/NLY331504172.
Concerto quinto in B-Flat Major: II. Allegro e spiritoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c6a60c7cbb8af40ba89a80ca27c2b47f447da08bbeafcc2fcd8ba8bd85d1f1. 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/NLY331504173.
Concerto quinto in B-Flat Major: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c427eb0100a06bf1505ad893c174c4c872a34a8043898636355d4da6d181da. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331504174.
Concerto che serve d'introdutione in G Minor: I. Grave, e adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70229e9ff3d90e37ee5c6462ebf5d5dd527c934d7f5f2a5b45a441a034404efe. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/NLY331504175.
Concerto che serve d'introdutione in G Minor: II. Spiritoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a38dfac23444f6b395705e54fffd1a04c3a13aad1ab3145f8ac203d9b31759. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/NLY331504176.
Concerto secondo in D Major: I. Maestoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49727592317525a9b5b612e0ce201b1c41f7203637d4e450b3870b405c40de28. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/NLY331504178.
Concerto secondo in D Major: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8efb019055a67d42d9c458d30079c8bce55041e04c0d701e4fd72a212d62152e. 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/NLY331504179.
Concerto secondo in D Major: III. Andantino
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6585d381fd1a6cdaf116f76ea770be425b5d31807193e713db3513aea71900f6. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/NLY331504180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c1c98c4dbc8fd0798b9fb6aad75f0e1b4a8102b8f2e9dfd05f7a567b64b79e. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331504181.
Giovanni Battista Bassani: La Tromba della Divina Misericordia
Italian Baroque: The Instrumental Edition Vol. 2