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 0xa54bf862a74fc92a774478e39db10084433718d69e8690f81101882c20172ecf. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/01e818c0-7ffa-4a53-8066-22350ed820b7.json and https://artists.proofprofile.net/proofs/artist/01e818c0-7ffa-4a53-8066-22350ed820b7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
"Milonga del Angel", para Dos Pianos, Viola, Contrabajo y Bandoneón
Martha Argerich - Daniel Rivera - Néstor Marconi, en el Teatro El Círculo de Rosario, Vol. 4, Homenaje a Astor Piazzolla
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 0x544e1848bcdc71dece6e463ab9d53a6a81ba3cafd196ab4929fbff7037b44884. 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/ARF241427402.
"Para el Recorrido", para Piano, Viola, Contrabajo y Bandoneón
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5f56cab02812fd67f08ebdb3b9dc3fd2d16aa8089ac1842d336b0a05d222d8. 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/ARF241427406.
Beethoven: Piano Quartets, WoO 36: No. 3 in C Major: III. Rondo. Allegro (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75aeff87318b1a8970309c0c52747b59273d301c84a15ea0aa3a1c3e41aa5ad8. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/GBAYC0502400.
"Libertango", para Piano, Viola, Contrabajo y Bandoneón
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd525d8b2e2fd41df36498433e419ca58c00000a321f79311177abfdb3607b3d. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/ARF241427408.
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
Le Carnaval des animaux, R. 125: XIII. Le cygne
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c829bb7559f4d0865352140470f058c87012a7fafd065043dc1c235336fba2e. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/CH8291400359.
Beethoven: Piano Quartets, WoO 36: No. 3 in C Major: I. Allegro vivace (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c26b9ee9035f5d2053b18dbbd027ba7e5f5f0888dffa6b4ad83f4fc8165127. 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/GBAYC0502398.
Beethoven: Piano Quartets, WoO 36: No. 3 in C Major: II. Adagio con espressione (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x814d6adfb3542f79e51de575b3424c0f84ac1f87345cec57def825a27c2d5251. 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/GBAYC0502399.