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 0xadbef85bff1f6832e6339ca9c35a8dd18278143b4bd4a7087c10d2993fddbe30. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/86df1383-0df0-4185-8f29-01a6d9689623.json and https://artists.proofprofile.net/proofs/artist/86df1383-0df0-4185-8f29-01a6d9689623.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Die Zauberflöte, K. 620, Act II: "Ach, ich fühl's" (Pamina)
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 0x29250db9b2bcdeebce1737bf91166699eba823cd312934907afbcd3e1b014c55. 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/FRZ299545250.
Die Zauberflöte, K. 620, Act II: "Tamino mein! O welch ein Glück!" (Pamina, Tamino, Die zwei Geharnischten)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719e0022be4f8a5245708b436fcbadba26a9a6c4c02358a42be2780995998bc4. 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/FRZ299545310.
Die Zauberflöte, K. 620, Act II: "Soll ich dich, Teurer, nicht mehr sehn?" (Pamina, Sarastro, Tamino)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90cd374e8c594274f5aa875451ecc13a635fd90c29f27ddfb4780f97301f368. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/FRZ299545270.
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: "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: "Der, welcher, wandert diese Strasse" (Die zwei Geharnischten, Tamino, Pamina)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a27317d82fc5d65b6b009e0af76e68021bea2fc8016cda3c8ce71239450c18b. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/FRZ299545300.
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.
Bizet: Carmen, WD 31, Act 3, Scene 1: "Quant au douanier, c'est notre affaire !" (Frasquita, Mercedes, Carmen, Chœur, Le Remendado, Le Dancaïre)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f5f5be5eb85dbb4f4b1f87090c220ba323b405bd1391613670b54fb7c144a1. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DEA809523352.