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 0x5d1305c1c943c26a9c21e41d32e564dae97d388bcd36cd052bfa7598557ff70e. Chain 2 (Bitcoin): anchored in block 954587 (2026-06-20T19:10:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bac9baf0-546c-4402-b830-cd6d987bc6ad.json and https://artists.proofprofile.net/proofs/artist/bac9baf0-546c-4402-b830-cd6d987bc6ad.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Haendel : Oratorio en trois parties, HWV 56 'Messiah'
Die Zauberflöte, K. 620, Act II: "Seid uns zum zweitenmal willkommen" (Die drei Knaben)
Mozart : La flûte enchantée, opéra en 2 actes, K. 620
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 0x1a35732b614946fec41978e3870125610d6b4f5d5eca07df1c79bb84889880f9. 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/FRZ299545240.
Die Zauberflöte, K. 620, Act II: "Wie? Ihr an diesem Schreckensort" (Die drei Damen, Papageno, Tamino, Chor)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d40cd88ab2482df33366370c467c4a76b394f7d82f804fa3b12e1e1f8da43ae. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/FRZ299545200.
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
Die Zauberflöte, K. 620, Act II: "O Isis und Osiris" (Chor)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22404cec6584ed91d22e1ed8cac147fbda4f970c62905c1a19313d25b70329fd. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/FRZ299545260.
Die Zauberflöte, K. 620, Act II: "Bald prangt, den Morgen zu verkünden" (Die drei Knaben, Pamina)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14dff71618eed3c18fcf1da6e29b3b16c407fc267e40469c2c526ba3f3c684ce. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FRZ299545290.
Die Zauberflöte, K. 620, Act II: "Wir wandelten durch Feuergluten" (Tamino, Pamina, Chor)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a927a5f04c7a5bdc642a0f70be32ba043bde9e623756b2b7a55032a068560b6. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/FRZ299545320.
Die Zauberflöte, K. 620, Act II: "Papagena! Papagena!" (Papageno, Die drei Knaben)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed9488cba5130aa2d940ca461093295b1463f6e8f06f757bdb58a985ffc6375. 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/FRZ299545330.
Die Zauberflöte, K. 620, Act II: "Die Strahlen der Sonne vertreiben die Nacht" (Sarastro, Chor)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e3723ca9a99c2c60b6abed5942e8c1a67d50e6e825446a9b1041a1fd88896b. 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/FRZ299545360.