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 0xa18fa1a2a638642ebc6e7b5cfef6bc36a4ca1cd4493e38b9f636fbab14364e06. Chain 2 (Bitcoin): anchored in block 954556 (2026-06-20T12:14:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/af194426-8f8a-4a2a-b683-153199c87774.json and https://artists.proofprofile.net/proofs/artist/af194426-8f8a-4a2a-b683-153199c87774.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Concerto for Cello, Strings and Continuo in G Major, INP 18: I. Adagio
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 0x4583b71c303f0a45fd545b94300b7dd934b59426b91c447247abf9576c5c2cc8. 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/DEE861400506.
Cleopatra e Cesare, WV B:I:7: Tra le procelle assorto (Aria)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71869c7c3769bfb392467dc215dfdb4e7903389ac1254d39a0caa6a5bcd9055b. 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/DEE861701229.
Marc'Antonio e Cleopatra: Morte col fiero aspetto (Aria)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f3814e1f23b2e913797c522d01b6e1b5cf750ceb5ffaf70ecbcf24d056545bf. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/DEE861701232.
Marc'Antonio e Cleopatra: Lascia, Antonio, deh lascia (Recitativo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7783689f0c8637d4d2167044a019d0f7ef1463be56ad436fae6ff9285669650. 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/DEE861701230.
Antioco il Grande: Se tu sarai felice (Aria)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dca7a589bb09946b13c0b2aa02d816de8208ba56bf37760e1fbb446ce97b9a0. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/DEE861701233.
La virtù trionfante dell'amore e dell'odio, ovvero il Tigrane, RV 740: Squarciami pure il seno (Aria)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2786d159a75a0e0bf1356830caf90ba2e0c923866fe4310ba5aba45d1a6902ec. 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/DEE861701236.
Die unglücksselige Cleopatra: Mein Leben ist hin (Aria)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496efc2c42ad714893f221fa077741306135805550db902d6d193047814755c4. 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/DEE861701237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff0eab213d1e91ec9c59440cb7b3ef3d483795f9b1d442ad74209b26bc796874. 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/FR50X2174501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda832613f4ee76299a66a084c1b55f7dba0f7d0df3d081bae8be666ddef7ff77. 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/FR50X2174502.
Giulio Cesare in Egitto, HWV 17: Che sento? Oh Dio! (Recitativo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3fd6898cf9e6191bd6a17e62526fe2888720ff4f861398694b5409c7ed4c17a. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/DEE861701227.
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
Giulio Cesare in Egitto, HWV 17: Se pietà di me non senti (Aria)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43224586eb7f79104f07dbf1554c33286bf55c174ba67d8ba0e08b8761c4f3db. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DEE861701228.
Marc'Antonio e Cleopatra: Quel candido armellino (Aria)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f5b28c4a7cfa69aaaa6f70245077edd1a47cb5b205e59a4fb8fd4d198b6f4e0. Chain 2 (Bitcoin): anchored in block 960155 (2026-07-29T22:13:32Z), 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/DEE861701231.
Marc'Antonio e Cleopatra, H. 121: Vò goder senza contrasto (Aria)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b79867e61cf7a729b7a591175e9c5f9efca1a909fb3aa1bcf9ef8ba1479f061. 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/DEE861701235.
Die unglücksselige Cleopatra: Ruhe sanft, geliebter Geist (Aria)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1049c9b2ff655e9fe1f720ce1a81f566a64ef18a93932572421a1439b2eeabe6. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/DEE861701238.
Giulio Cesare in Egitto: Quando voglio (Aria)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930a7bfccc947dbee024f619c8e282906e7874639d0ecd9c37853505f09047a1. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEE861701239.