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 0xf99e095509974c7e1d3b6821815237cde8eea928196aa056f6ec2e7ada67640f. 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/3ae301b0-169b-4dd3-8e04-d337aee3cb2d.json and https://artists.proofprofile.net/proofs/artist/3ae301b0-169b-4dd3-8e04-d337aee3cb2d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Orchestra del Teatro Massimo Bellini di Catania
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 0x0131c45af77ecfe322c7d36257f28b8938fc70029f3979c269b2715910411aa3. 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/QZDSS1900205.
Il Pirata, Act I: Del disastro di questi infelici
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x611ee74ae0977da04ff4421935b04db33c1b582d731f889c9dd2030d964edba4. 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/QZDSS1900209.
Il Pirata, Act I: Per te di vane lagrime
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3871b2e45835969bc5c1a8e0356f88900ae3ff34905337b36dbf28841c0e3f. 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/QZDSS1900210.
Il Pirata, Act I: Sventurata, anch'io delirio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x283867836960851c9806b3b76bd5f9557d7ba7614e4234f88be1d44d57b692d2. 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/QZDSS1900214.
Il Pirata, Act I: Evviva!... allegri!...
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a096e168a2761574e8e425a585031f542619e1f9d0b7a76cc999d1103e5fe4. 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/QZDSS1900215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2188c4aa555c27245900e955a90d3846f8ad79c86a1867b8ce1ef217a31bc59b. 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/QZDSS1900225.
Il Pirata, Act I: Parlarti ancor per poco
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb88e136de9db6f1ebf3d7c16b2dec2ab864c2ba96699007970e27dd448790221. 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/QZDSS1900228.
Il Pirata, Act I: Ebben; cominci, o barbara
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c574c26706e2b32ffc9482a008e810a5ed176558f1ca915899c3955b78f59b. 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/QZDSS1900229.
Il Pirata, Act II: Vieni cerchiam pe'mari
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4b76f5fa1c2b8f6dbcc0e1e3bd2ed60779e6f17e220aa0170a6f6b26bff6e9. 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/QZDSS1900239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab89bcbf9218bc4196802dff16cc64183d1f500f7aeb39a160575f949dd7cc73. 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/QZDSS1900251.
Il Pirata, Act I: Ciel! qual procella orribile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6ed4bf641e4e28d02a12c32323594388f3752548633e3aa41e84df1c9e56ac. 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/QZDSS1900206.
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 0x7998f0730fe1aea067f54ad366de1f685116e2aeb61c098ba02c64e4a1870186. 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/QZDSS1900207.
Verdi: I Lombardi alla prima crociata (Live)
La Fanciulla del West, SC 78, Act I: Hello, Nick!
Transylvania State Philharmonic Orchestra of Cluj-Napoca
Transylvania State Philharmonic Choir of Cluj-Napoca
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e80b7761780f2ca25dfde39a0710d9289e95545f654149982b9d8a9a230523. 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/NLE421805302.