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 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 0xb70c12fa2a516ca2d274226e8c5ac51da9a7b4e957ac4635407b3e9c15733c45. Chain 2 (Bitcoin): anchored in block 953812 (2026-06-15T17:06:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f55322d0-a0ac-4459-bf87-55a95a1d9bc2.json and https://artists.proofprofile.net/proofs/artist/f55322d0-a0ac-4459-bf87-55a95a1d9bc2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Dido and Aeneas, Z. 626: The Witches Dance (Arr. Montanari for Chamber Ensemble)
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 0x1b4f1d25eae338c69445973f0ea8000e857452752633e13afa81a87dbdb0b129. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DEB331439001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7dc85d944be83fdb536c179ecb5968d98a90d50e5f8e2e7e44321d5d07194f. 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/DEB331439002.
Consonanze stravaganti (Arr. Montanari for Strings)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe917cca84c244545babf916d29d4c7df3241a237178f9831d37abc12b8f7ec89. 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/DEB331439003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e74819e786120ee669df237e6c2a03f3ec02f5fa05371915acba7fee3a0501. 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/DEB331439004.
Missa L'homme armé: Kyrie I (Arr. Montanari for Strings)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e929ac0fbf37f2590fc57fe5ce7940626eea76cc192eb4a787e82f368df8e84. 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/DEB331439005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e4873cc4e011a5e8f5d468f31c89fe27d0f3ab3ff373a79d3c6ab525739b289. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/DEB331439006.
Dido and Aeneas, Z. 626: When I Am Laid in Earth (Arr. Trovesi for Chamber Ensemble)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b88b2ed1016359aba504d9fb0a6e3b8405a10b8fa9e9fa624b61214afc2e002. 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/DEB331439007.
Sonata No. 10 "Cavaletto zoppo" (Arr. Montanari/Trovesi for Chamber Ensemble)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eadd0bd7b65fb25e062c68b87cba38e21fa1681fd0e40249505390260436690. 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/DEB331439009.
La suave melodia (Arr. Tommaso for Chamber Ensemble)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6088e68b893665f8e269f3facc49f38d5e209ea61bb7ea6d6eacfaeef26add. 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/DEB331439010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63f58c8240d9837d8e53db89f15125c3aecc9c116d2ec7c66d9262fd8b3f49c. 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/DEB331439015.
Purcell: Dido and Aeneas, Z. 626: When I Am Laid in Earth (Arr. Trovesi for Chamber Ensemble)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b88b2ed1016359aba504d9fb0a6e3b8405a10b8fa9e9fa624b61214afc2e002. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEB331439007.
Salomone Rossi Ebreo: A Jewish Composer in 17th Century Italy
Candia 1669: Venetian, Greek, Ottoman & Sephardic Music at the Time of the Cretan War
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f470d3b15dbaa3f9ac18bcde8fbc9d6e86044454b2197f61935405f317ddaf6. 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/FROV61820918.
Le Bourgeois gentilhomme, LWV 43: Marche pour la cérémonie des Turcs
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0400bc5592e55812238109e3a4436b005d31d0f3d67d3a004acc3aa47004da. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/FROV61820923.
Per l'Orchestra di Dresda, Vol.1 Ouverture
Il serpente di bronzo, ZWV 61: Potrei sovra degli empi (Dio)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b83b3a643889afe5b54619e0348c05c22d486f4fa62fc9595994c3c1defb14. 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/FROV62125802.
Telemann: Concerto for violin in D Major, TDW 53:D5: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a4dee99fb99ce3cca1c7ac8abb1ac3a087ca1fb9664825df136b388dc3ee7a5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZES51849855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4082d0d39f142a3218402f7688747b16f6afe622bb6ae08c337621bc9417c1. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/QZES61834866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae00d7ecf99a72f067dba5a4d9bd3363a6957ea87856dd036b046f77b3e6aa2f. 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/QZES61834867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x638d37e69d169109f1f31ccd11192f283fed4353ac8ba26c8cbf287e44dec025. 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/QZES61834868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15bd4b8c40aa31a35ec8dbf8cc2c481195539536472e3c4b8e59b78fc8f81cee. 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/QZES61834869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79745149172df1f6640c8aa53a4e4b229733e8a600402a6988c2103e29d56173. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZES61834870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0679a4bb27934be252559a05669d21602127a8671c649ee0598385e7a2ef55. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/USHM21737048.
Riccardo Zandonai: Fra i monti; Jan Novák: Balletti a 9