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 0x73c757d43a976b6af4abd1fc97d7ee2672c029d47ca457055c8afaa5e55f22f2. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3cdb429d-c49f-4fd7-a540-9213e6681658.json and https://artists.proofprofile.net/proofs/artist/3cdb429d-c49f-4fd7-a540-9213e6681658.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Works for Piano Trio by Lachner, Jensen and Glinka
Concerto in B Minor, Op. 3 No. 10, RV 580: III. Allegro
Vivaldi: Concerti per archi (Concertos for Solo Violins & Strings)
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 0xff5da3d5bb1a06e2560d65515e7d988a50a08464437a8b238e2afc7990feb9c5. 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/DEAQ70700065.
Concerto in B Minor, Op. 3 No. 10, RV 580: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c831542f17eba62d3687bb24016d057434f0c0f66ee526e39f6b68d56b6cf3e. 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/DEAQ70700063.
Concerto for 2 Violins, Strings and Basso Continuo in A Major, TWV 52:A2: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0556d0156e35dd0d9e64072b6ae714e0895e318f499e6f802a8a6cb1b28727b3. 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/DEN960500172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286f199d180500ec10578015bfd6c06ef13ffd28dbad97350614f863def4251e. 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/BXPCT1600002.
Concerto in B Minor, Op. 3 No. 10, RV 580: II. Largo, Larghetto, Adagio, Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4099e49a75e842bda7248c0eea54fda59a5ec3b681a18d7d1cb4c82088348a75. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/DEAQ70700064.
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
Concerto for 2 Violins, Strings and Basso Continuo in A Major, TWV 52:A2: I. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92109750b663b364d8223d465888fb1a9ccbeb30c227032bf0e5026b14e99758. 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/DEN960500171.
Concerto for 2 Violins, Strings and Basso Continuo in A Major, TWV 52:A2: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7725f68b30e6b68a5f2c888933f4ee2b4f13b87b4dd39604483dc08a7638fe6. 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/DEN960500173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a8a3faf77f90e5fdecc23d8a6e1a4f65bec7479a9ed13208c46a85372a98bc. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/BXPCT1600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd38620da9c9a6ac1f8ccc6423cb00b0e8aa09176666eb5119b26cde9c98f17. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/BXPCT1600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fcc5831be8a3b65bea0532c3555096585f850e0678bf9f62af9aded8f5c3570. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/BXPCT1600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f58c7e026a0da8e1605396b9a0029b4f24e005f981dfcc5eaa06c9ca75d840. 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/BXPCT1600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a537ea0f077c6d364434ff02494882594145533f2496b93d1dee8033fc0d67. 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/BXPCT1600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41907f778a66219756799473d7606671d1b1740d546bcb3e78283919528fb3b2. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/BXPCT1600008.