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 0x5c6514080d40b8d5e04fb5e70dbc0cf840331e1c0b3777f7e2e81ca41f5436ca. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/da96d997-c8cd-4b24-8e8e-4ff900110edb.json and https://artists.proofprofile.net/proofs/artist/da96d997-c8cd-4b24-8e8e-4ff900110edb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
María de Buenos Aires: Yo soy María (Arr. for Voice, Cello & 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x119c0ce86c3ad473844af787ddc29bfb360d6e75b1118686c9adb99fb2c49c90. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/FROV62436803.
Vayamos al diablo (Arr. for Cello & Ensemble)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9091ea34b2bb42be081168387387d79b8ab9a3d08e41fcbecec4a9cc465e2b7f. 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/FROV62436805.
Las Cuatro Estaciones Porteñas (Arr. for Cello & Ensemble): II. Otoño porteño
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e854a119af0e3175555067c6673a6094788e9576c0ee32162cdcd77c5a47550. 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/FROV62436806.
Regreso al amor (Arr. for Cello & Ensemble): I.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0198024e05eb97b72f7db45cc6762a36f3ca0c130b978f92d6524ae624b6282b. 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/FROV62436816.
Oblivion (Arr. for Voice, Cello & Ensemble)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a16cce4d3b54cd04a3fdff806a0b9b18afe9aa3f944469323512dd2e6b7e911. 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/FROV62436819.
Piazzolla: María de Buenos Aires: Yo soy María (Arr. for Voice, Cello & Ensemble)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x119c0ce86c3ad473844af787ddc29bfb360d6e75b1118686c9adb99fb2c49c90. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FROV62436803.
La muerte del angel (Arr. for Cello & Ensemble)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f43ed0a5988ca57355ba128ef06d8f2b3cdc23c2f1bba774683d47172bc401. Chain 2 (Bitcoin): anchored in block 960355 (2026-07-31T05:49:18Z), 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/FROV62436818.
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