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 0x04bf5ac8c2f29861d635cf645161bae3ca154bc445e2072bfc98f2c1d3b055d2. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f458d6c6-d1b7-4172-975d-15230b079519.json and https://artists.proofprofile.net/proofs/artist/f458d6c6-d1b7-4172-975d-15230b079519.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Il sonno (After Vivaldi's Flute Concerto, RV 439 "La notte" and Concerto for Two Violins, Op. 3 No. 2, RV 578)
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 0x24bfb1e21f9d6ab792610657cd19d48ba18b793b42eb0eb582629857c296c9fe. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/FR34F0100050.
O'stravaganza (After Vivaldi's Sinfonia, RV 168)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d6e14e7010db33cb4f3cc82580f9a600fa44f37ed19b5faf1228b39a41e57a. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/FR34F0100010.
Il duello (After Vivaldi's Concerto for Two Violins and Cello, Op. 3 No. 11, RV 565 and Violin Concerto Op. 8 No. 5, RV 253 "La tempesta di mare")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77fc6f385cddb4f0c49d60ec891942321624e19c8939999244b1a8b65e60484. 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/FR34F0100070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b848c130e00f7b107f25efe2858a893e60157a452c731f73218cbc97e1c75c9. 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/FR34F0100060.
Classics Reframed - Bach, Vivaldi & Mozart
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d6e14e7010db33cb4f3cc82580f9a600fa44f37ed19b5faf1228b39a41e57a. 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/FR34F0100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b848c130e00f7b107f25efe2858a893e60157a452c731f73218cbc97e1c75c9. 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/FR34F0100060.
Estro-Reel (After Vivaldi's Violin Concerto, Op. 3 No. 3, RV 310)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1819b3a1e9faef811a396672550b2cde97b0325f24f0145340b9c1d81498bdfc. 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/FR34F0100040.
Damhsaigh (After Vivaldi's Lute Concerto, RV 93)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d6952131bd59ef784b727581b65c18254217c8d745ce2501bec53e8d08820e. 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/FR34F0100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24bfb1e21f9d6ab792610657cd19d48ba18b793b42eb0eb582629857c296c9fe. 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/FR34F0100050.
O'stravaganza, Fantasy on Vivaldi and the Celtic Music of Ireland
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d6e14e7010db33cb4f3cc82580f9a600fa44f37ed19b5faf1228b39a41e57a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR34F0100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d6952131bd59ef784b727581b65c18254217c8d745ce2501bec53e8d08820e. 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/FR34F0100020.
Berceuse de Gráinne pour Diarmait (After Vivaldi's Nisi Dominus, RV 608)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d3577cadfb74ceecad6dd06b68db0d3c8b97d1bf583a49d9c14f2b166162cd8. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T14:02:48Z), 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/FR34F0100030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1819b3a1e9faef811a396672550b2cde97b0325f24f0145340b9c1d81498bdfc. 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/FR34F0100040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24bfb1e21f9d6ab792610657cd19d48ba18b793b42eb0eb582629857c296c9fe. 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/FR34F0100050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b848c130e00f7b107f25efe2858a893e60157a452c731f73218cbc97e1c75c9. 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/FR34F0100060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0a3632198dacc40796638c63f506adb0bc7e1a55bf36909b457f2276f8bb30. 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/IEAQY0800054.
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
Eirin Sonata (After Vivaldi's Cello Concerto, RV 407)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e3e5b6c924a19c0afc97fdf8902184710d6059be9c7beb521b1e0f9859c4bc7. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/FR34F0100100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x722b67f3d9dd8b29834c01b5aabcb3e3c0af9e41007807372bf48744c978a407. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/FR34F0100140.