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 0xa59176576856f557b51d7dd04870a736c03fe05e1b8cce3de50efa4ff319b145. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cb93b99b-8093-43b9-818d-3f9b2fa04613.json and https://artists.proofprofile.net/proofs/artist/cb93b99b-8093-43b9-818d-3f9b2fa04613.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0xa81ba7a0c9a2acaca1749c68c92a73a698e9c0d7897ae0699ae0b945538d569b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/HKI199925401.
Fidelio, Op. 72, Act I: Duet. Jetzt, Schatzchen, jetzt sind wir allein (Jaquino, Marzelline)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68fb3d92e4f39d05fd1cceaf477c0b7fb057222e81ae982002e653a9bd93b2ff. 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/HKI199925402.
Fidelio, Op. 72, Act I: Aria. O war' ich schon mit dir vereint (Marzelline)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa7ee0a21a2f4be442b855a5310c372ce93f496415cd8d20b6c7ea111950cb8b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HKI199925404.
Fidelio, Op. 72, Act I: Quartet: Mir ist so wunderbar (Marzelline, Leonore, Rocco, Jaquino)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bcbf5a4f2156fa589683ad70855550b3216928068f2b56d00c4462be88c516d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HKI199925406.
Fidelio, Op. 72, Act I: Aria. Hat man nicht auch Gold beineben (Rocco)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf07cf7e6f0bc9f546e72b6d0b4d350a1eeb75ac1d0a585f9cd055fba8da243b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/HKI199925408.
Fidelio, Op. 72, Act I: Terzetto. Gut Sohnchen, gut (Rocco, Leonore, Marzelline)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f14bb8c9a2e6ff18d2d8ca72249e25b23ee887c36e54a9137e0c5919da89487. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/HKI199925410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf1316989cf8a84a744b1daf7a70129e7435ba8b88cf32201f14f57ab7a6e01. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/HKI199925411.
Fidelio, Op. 72, Act I: Aria and Chorus. Ha! Welch ein Augenblick! (Pizarro, the Watch)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x964bdbfe6c3a10688564966fb29a4112b7c5d2ba63e48a1e9922ea22206ab77b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/HKI199925413.
Fidelio, Op. 72, Act I: Duet. Jetzt, Alter, jetzt hat es Eile! (Pizarro, Rocco)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b60343640a20b01ee36f6b14f77b18e8c76126c8ea30bef1656ee771cf0b0b. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/HKI199925415.
Fidelio, Op. 72, Act I: Dialogue: Marzelline! Marzelline!! (Jaquino, Marzelline, Rocco, Leonore)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda7da5653f100db2098ef7ba9105908b17e024aa111f4473f554f307ce2c9d2a. 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/HKI199925417.
Fidelio, Op. 72, Act I: Finale. O welche Lust (Chorus of Prisoners)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdbd42ecf3d6dd47299fc8e4c7062515353844daaf0fdeaf15f86fb55eeeeb7c. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T16:57:15Z), 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/HKI199925418.
Fidelio, Op. 72: Abscheulicher! Wo eilst du hin?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3e1376554797a1a73bf2f08b32d7ac5d8411e621d40ad9689f8ecfcdb635d0. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/HKI199925416.
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
Fidelio, Op. 72, Act I: Dialogue: Marzelline? Marzelline? (Rocco, Marzelline, Jaquino, Leonore)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29aa131f411b99bb9244d16b91d1358ff60cf3b1ffd9e9030004a495dfaf0331. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/HKI199925405.
Fidelio, Op. 72, Act I: Dialogue: Hore Fidelio! (Rocco, Marzelline)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbefdf822d47e434bbef03d7547169bd4fd5c7f3a4af9e2197e256d4898d918ce. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/HKI199925407.
Fidelio, Op. 72, Act I: Dialogue: Ihr habt recht, Vater Rocco (Leonore, Rocco, Marzelline)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae467347458a9d7edc6bcc7ac6da702f4b9f178f5a3870dbb08b1c0b1b5689d. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/HKI199925409.
Fidelio, Op. 72, Act I: Dialogue: Drei Schildwachen auf den Wall (Pizarro, Rocco)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dcea53e1ce242125caf96b3c65142bb83ee91095d0384f4614638328b8d46ab. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/HKI199925412.
Fidelio, Op. 72, Act I: Nun sprecht, wie ging's? (Leonore, Rocco, Marzelline, Jaquino, Pizarro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38687f0d4cf457ebb9240953c6df6a756e781876fe12ef91a5158449763da200. 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/HKI199925419.
Fidelio, Op. 72, Act I: Leb'wohl, du warmes Sonnenlicht (Prisoners, Marzelline, Leonore, Jaquino, Pizarro, Rocco)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af4b06f07a7df436b270a89f32cfe590e35db66aac5e68802350a8db122e869. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/HKI199925420.