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 0x1731a24c89f2620de51406c21e7f3df5a3fec8c9e73a689d177aa1f38e6e22df. Chain 2 (Bitcoin): anchored in block 954638 (2026-06-21T03:45:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d320903c-576e-49bd-b705-205f38e966ee.json and https://artists.proofprofile.net/proofs/artist/d320903c-576e-49bd-b705-205f38e966ee.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
6 Trio Sonatas, ZWV 181, No. 2 in G Minor: III. Andante
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 0x393be25afc20d7b9afae04b980c442a12f5afca0afbd21e6344cb64b1a396140. 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/DEB339767107.
6 Trio Sonatas, ZWV 181, No. 5 in F Major: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa90800d00b1cc8f68bd8a73836fdbd31efe62782e58f54688f6472e7204a8d78. 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/DEB339767207.
6 Trio Sonatas, ZWV 181, No. 2 in G Minor: IV. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa16556416986468528ffaff3c36bb00fd018667188d7f9aae34a0fdde1844b96. 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/DEB339767108.
6 Trio Sonatas, ZWV 181, No. 6 in C Minor: I. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28d31c0b0bc4d1c71e62b701eb31becd7d3ef711473d03d55eeac4811bc9ce2. 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/DEB339767208.
6 Trio Sonatas, ZWV 181, No. 3 in B-Flat Major: I. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb87b5193dc5910307a14c7e2ed3f28621081bed7417e326ef1bb914a91b6a75c. 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/DEB339767109.
6 Trio Sonatas, ZWV 181, No. 6 in C Minor: IV. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b289a7d747fda055ffac7dc57c5cfdafcd6c5502e4525a055b89f28adef726f. 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/DEB339767211.
6 Trio Sonatas, ZWV 181, No. 3 in B-Flat Major: IV. Tempo giusto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc40582cef7290b1660855eae711aad18524dd596dc7694fc03a18747b12b196. 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/DEB339767112.
6 Trio Sonatas, ZWV 181, No. 1 in F Major: I. Adagio ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8351942dd9f50fec94394837fa383a1e47e09ea6dfc4a4f586f94f037d2c260. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/DEB339767101.
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
6 Trio Sonatas, ZWV 181, No. 4 in G Minor: I. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d4066a41ba1c21d68dc41d92c218f9b94e29946b8ee908a3282c30d0eaf172. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/DEB339767201.
6 Trio Sonatas, ZWV 181, No. 1 in F Major: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33bde37416e2dd59aad624c7e004d247df3be1dec1bc5247b8d380bd747cff0b. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/DEB339767102.
6 Trio Sonatas, ZWV 181, No. 4 in G Minor: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8daed77b539f573af0eca86d08ddd83b91ab9b7e15555328a59695553dbac8. 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/DEB339767202.
6 Trio Sonatas, ZWV 181, No. 1 in F Major: III. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a4c83995bda36fea25bb2d1196772e7343bb523b9e99b7b37cea204c99ab36. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/DEB339767103.
6 Trio Sonatas, ZWV 181, No. 4 in G Minor: III. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df8004f0a3afb5e60efc9991cede95c6dd65efa0e7e6b796818c26a307a998b. 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/DEB339767203.
6 Trio Sonatas, ZWV 181, No. 1 in F Major: IV. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8baa9605a8ca88e2d09931634c149e47a56385a74e97e6ca800279550745ac61. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/DEB339767104.
6 Trio Sonatas, ZWV 181, No. 4 in G Minor: IV. Allegro ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef77ed764709be523e7420ad3acbaa484cb0f0a968a08e78e9120bd66a8438f. 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/DEB339767204.
6 Trio Sonatas, ZWV 181, No. 2 in G Minor: I. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x592fef06badcd6a114fca2b4405bbbbf141af1dc1259d4c05b1d91be602af659. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB339767105.
6 Trio Sonatas, ZWV 181, No. 5 in F Major: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dbff8163aba51cf336e90727795f45723a57b47baac8640b0647a81fc82168a. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/DEB339767205.
6 Trio Sonatas, ZWV 181, No. 2 in G Minor: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba935d09928a68d80afa13fb6c76906bbdbbe4e5dd3fb5924cac74dc0ec4ed5b. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/DEB339767106.
6 Trio Sonatas, ZWV 181, No. 5 in F Major: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc610422d8359447103b87d781c0511cb77b74ef7d5501d5d8cb207a72b6ac12. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB339767206.
6 Trio Sonatas, ZWV 181, No. 6 in C Minor: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0eda27fe9edbe2b114c25ade1397bf007e5eb10ebb701d15b0ddcfb838fc4f. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB339767209.
6 Trio Sonatas, ZWV 181, No. 3 in B-Flat Major: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1601a3bdc40469c9f865431641f88ff1af71b535ab56ad3b706fea14a4ca780e. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DEB339767110.
6 Trio Sonatas, ZWV 181, No. 6 in C Minor: III. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dffcd09cfc3cbb01f6c7d65e6b98b5b44ef5e7e5b7dd8154ad3077360e6ef06. 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/DEB339767210.
6 Trio Sonatas, ZWV 181, No. 3 in B-Flat Major: III. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68aa2995077442a93e4dffb0bb9ccac05d4db851de425f62179ba3014cc4fb0d. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB339767111.
Monteverdi: Vespro della Beata Vergine, SV 206
Monteverdi: Vespro della Beata Vergine, SV 206: Invitatorium. "Deus, in adjutorium meum intende"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d9c449bde36eb594f8e9083a9929a51963828d9d08a8e938ead5c21e3a5840. 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/FRZ209713501.
Monteverdi: Vespro della Beata Vergine, SV 206: Psalmus. "Dixit Dominum"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa22247a9be3c202e0bf4ad8abc05f55764efd79426a7f9e5f13dddbf9c6f7cd. 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/FRZ209713502.
Flute Concerto in G Minor, RV 439, Op. 10 No. 2 "La notte": IV. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220661f3825524a12e67420a722eb89979d1e971296f4edc4ecefcea7638b6c9. 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/DEF059204174.
Concerto for 4 Violins in E Minor, Op. 3/4, RV 550 (L'estro armonico No. 4): III. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3022b8c7cf8bd6c14c6acf7877759f5be071d41cbb19164c97526e7b6e6d8089. 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/DEF057209043.
Concerto for Guitar and Strings in G minor, Op. 10, No. 2, R.439 - Arr. from Flute Concerto in G minor, Op. 10 No. 2, R.439: 2. Fantasmi (Presto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb16a681f8cab1f090f423795296214037a4e1e7a8d514148143a798cdeb84a. 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/NLA509100505.
Concerto for Guitar and Strings in G minor, Op. 10, No. 2, R.439 - Arr. from Flute Concerto in G minor, Op. 10 No. 2, R.439: 4. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34fe8165e4742e47c768f95ec181f6b25a34f4cee8c1f5c7c5fba9eeb0ca1331. 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/NLA509100507.
Concerto for 4 Violins and Cello in B Minor, Op. 3/10, RV 580 (L'estro armonico No. 10): IIa. Largo –
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb51c5762dce229cab8758962151dc0c9935b78bd366fa3a6a7ea8863ac67d2a8. 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/DEF057209062.
Concerto for Recorder, Oboe, Violin, Bassoon and Continuo in G, R.101: 2. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ead30aac395c325df7178490680ef2316a4d6c8104758e1fe3daa39c414cd3. 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/NLA508219725.
Concerto for Guitar and Strings in G minor, Op. 10, No. 2, R.439 - Arr. from Flute Concerto in G minor, Op. 10 No. 2, R.439: 3. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e68882920170853026554404c09d8a32b97502119fdce70a1b6aab37d43911. 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/NLA509100506.
"December" - A Season of Orchestra: Vivaldi
Concerto in D Major for Flute and Strings, RV 428 "Il Gardellino": II. (Without Tempo Indication)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfccccb3b11f225efe0f9027cda190984fb5fda408e43d1a5500dd85b47aa523. 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/DEF059204182.
Aria Di Camera: A Choice Collection of Scotch & Irish Songs