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 0xad0ca64c4b155df4add82019d7fe4d77377301504be07264cca99c88cce164ab. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6be041cc-8cc1-46d0-b11a-f3c93d20eeed.json and https://artists.proofprofile.net/proofs/artist/6be041cc-8cc1-46d0-b11a-f3c93d20eeed.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Artaserse, Act III, Scene 1: Aria "Son qual nave ch'agitata" (Arbace)
La musique au temps des castrats - Astrée Recordings
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 0xe71c92936bb72dacbf6c09273bd241e818e2ac07d23d4bf15a9c184f4e8b7f31. 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/FRZ130893100.
Artaserse: Son qual nave ch'agitata (Air de Arbace)
Farinelli - Il Castrato (Original Motion Picture Soundtrack) [From Gérard Corbiau's Film Farinelli, il castrato]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044d26105127e8b6d3c27a7aa9b81c5a411f20d50f552d47cbad95acf30c399e. 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/FRZ139320660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b6b550b550a98846f181cdbd879903fc2ac877deb23f2e6cb3965b29ef3954. 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/FRZ139320670.
Idaspe: Ombra fedela anch'io (Air de Dario)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00bb7b8bdd3c76dc61b8b4620279a35223dbcf54b4abfcf06a4a94cdda8c3eae. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FRZ139320690.
Rinaldo, HWV 7a: Lascia ch'io pianga (Air de Almirena)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1ea0be538df81ffe8bd41c04c90e9a3d32ab8187d7f96b23962b8fcde2f25e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FRZ139320710.
Rinaldo, HWV 7a: Cara sposa (Air de Rinaldo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7f1cb28728f025c5becfd3eb19522a18d73af6a1f31890fe26bf32aafa7e40. 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/FRZ139320720.
Cleofide: Generoso risuegliati o core (Air de Poro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4325fc7f1310dcb1c1bb0563c87f2ce05bc7aeb164349bd3dc0764edf8ba752. 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/FRZ139320740.
Salve Regina in C Minor - Transp. in A-Flat Minor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf2cd449d776a0fbee58ef0b117d6dedfd478c5d2a8eb0e217ec00b73eb81658. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRZ139320750.
Polifemo: Alto giove (Air d'Acio) - Instrumental Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a69604bda72730b4635cfd21d8d7c4a5d77f9745c57c74bdd5d597381e4d206. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRZ139320760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798c8e371d6c1e8acb3e749f77fbe5c4e49f7d807feb8e826ea9f7b8a51ab58a. 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/FR47Q0901920.
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
Polifemo, Act III, Scene 5: Aria "Alto giove" (Aci)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3378aca54b538aa9c1521789b47fc7f629a998924f5775f7cf48b09bbb731d09. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FRZ130948160.