1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0x9e30ae8326f48f37e5b5304437afbd089da7b0911a5fb8f23aed3abc9368d3b5. 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/025b9f9f-9831-44f0-ad73-3a4e89838c70.json and https://artists.proofprofile.net/proofs/artist/025b9f9f-9831-44f0-ad73-3a4e89838c70.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Franz Schubert: Messe in G. Musica sacra
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. GET OTSBitcoinBlockVerifyURL → block OTSBitcoinBlock must exist at that height 3. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 4. GET OTSVerificationAPI → pre-computed 6-check result from server 5. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5fad6e854632c326887821ba100bf79e2b3d91fd7842b8415f60ddc074f223c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/0z70ViBJwkBK4scA0pmHH1.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/0z70ViBJwkBK4scA0pmHH1.
Mass No. 2 in G Major, D. 167: II. Gloria
{"copyright_id":"0xa65ec620797105be4f735f9c1c736b4df8a6e723f1b3a5dc57c4b2ccb7e1b095","isrc":"DEB119600116","name":"Mass No. 2 in G Major, D. 167: II. Gloria","registered_at":"2026-06-26T00:09:19Z","spotify_id":"08UTOiMaoKGSFsq6DVFcvW","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa65ec620797105be4f735f9c1c736b4df8a6e723f1b3a5dc57c4b2ccb7e1b095. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/08UTOiMaoKGSFsq6DVFcvW.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/08UTOiMaoKGSFsq6DVFcvW.
Mass No. 2 in G Major, D. 167: III. Credo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66cc86a4ab4892cea9da4eee261e669d1c5091aa8010bfbd36688d8920417dbc. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/2l12uj1ogsd07msYAAvk8V.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/2l12uj1ogsd07msYAAvk8V.
Mass No. 2 in G Major, D. 167: VI. Agnus Dei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908b347b226db0a505e8bd684f82e795c33ecce41289ec4cfc31f977c712d859. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/2b6yJjuU2Hq4wOHh4BfJPr.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/2b6yJjuU2Hq4wOHh4BfJPr.
Mass No. 2 in G Major, D. 167: V. Benedictus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b36b291b6b41e224c3c24656b841c1f83b64b2b7b12df3b7cc4f7e2e383bb3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5tdlf5g1JZTVqq3L7n6IPv.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/5tdlf5g1JZTVqq3L7n6IPv.
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. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/3IjkKx4Jcun93Iw5dpKFUC.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/3IjkKx4Jcun93Iw5dpKFUC.
Fidelio, Op. 72, Act I: Duet. Jetzt, Schatzchen, jetzt sind wir allein (Jaquino, Marzelline)
{"copyright_id":"0x68fb3d92e4f39d05fd1cceaf477c0b7fb057222e81ae982002e653a9bd93b2ff","isrc":"HKI199925402","name":"Fidelio, Op. 72, Act I: Duet. Jetzt, Schatzchen, jetzt sind wir allein (Jaquino, Marzelline)","registered_at":"2026-06-20T22:59:42Z","spotify_id":"2tSFyxHOGbaWZgycjacyuv","type":"track"}
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. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/2tSFyxHOGbaWZgycjacyuv.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/2tSFyxHOGbaWZgycjacyuv.
Fidelio, Op. 72, Act I: Dialogue: Armer Jaquino (Marzelline)
Fidelio, Op. 72, Act I: Aria. O war' ich schon mit dir vereint (Marzelline)
{"copyright_id":"0xfa7ee0a21a2f4be442b855a5310c372ce93f496415cd8d20b6c7ea111950cb8b","isrc":"HKI199925404","name":"Fidelio, Op. 72, Act I: Aria. O war' ich schon mit dir vereint (Marzelline)","registered_at":"2026-06-17T22:19:31Z","spotify_id":"69k7EGVHOk5o6f38QYPMCo","type":"track"}
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. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/69k7EGVHOk5o6f38QYPMCo.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/69k7EGVHOk5o6f38QYPMCo.
Fidelio, Op. 72, Act I: Dialogue: Marzelline? Marzelline? (Rocco, Marzelline, Jaquino, Leonore)
Fidelio, Op. 72, Act I: Quartet: Mir ist so wunderbar (Marzelline, Leonore, Rocco, Jaquino)
{"copyright_id":"0x9bcbf5a4f2156fa589683ad70855550b3216928068f2b56d00c4462be88c516d","isrc":"HKI199925406","name":"Fidelio, Op. 72, Act I: Quartet: Mir ist so wunderbar (Marzelline, Leonore, Rocco, Jaquino)","registered_at":"2026-06-19T09:01:39Z","spotify_id":"23TL9bvBWoPvmiFyG0U1cb","type":"track"}
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. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/23TL9bvBWoPvmiFyG0U1cb.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/23TL9bvBWoPvmiFyG0U1cb.
Fidelio, Op. 72, Act I: Dialogue: Hore Fidelio! (Rocco, Marzelline)
Fidelio, Op. 72, Act I: Aria. Hat man nicht auch Gold beineben (Rocco)
{"copyright_id":"0xdf07cf7e6f0bc9f546e72b6d0b4d350a1eeb75ac1d0a585f9cd055fba8da243b","isrc":"HKI199925408","name":"Fidelio, Op. 72, Act I: Aria. Hat man nicht auch Gold beineben (Rocco)","registered_at":"2026-06-26T19:21:31Z","spotify_id":"0gc0YUI8kOUAPyCVHlROYg","type":"track"}
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. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/0gc0YUI8kOUAPyCVHlROYg.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/0gc0YUI8kOUAPyCVHlROYg.
Fidelio, Op. 72, Act I: Dialogue: Ihr habt recht, Vater Rocco (Leonore, Rocco, Marzelline)
Fidelio, Op. 72, Act I: Terzetto. Gut Sohnchen, gut (Rocco, Leonore, Marzelline)
{"copyright_id":"0x9f14bb8c9a2e6ff18d2d8ca72249e25b23ee887c36e54a9137e0c5919da89487","isrc":"HKI199925410","name":"Fidelio, Op. 72, Act I: Terzetto. Gut Sohnchen, gut (Rocco, Leonore, Marzelline)","registered_at":"2026-06-26T19:38:01Z","spotify_id":"63saYKwk688RqpD6QVjwnA","type":"track"}
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. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/63saYKwk688RqpD6QVjwnA.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/63saYKwk688RqpD6QVjwnA.
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. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/0J32qKBYPfD7uVJRckbELt.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/0J32qKBYPfD7uVJRckbELt.
Fidelio, Op. 72, Act I: Dialogue: Drei Schildwachen auf den Wall (Pizarro, Rocco)
Fidelio, Op. 72, Act I: Aria and Chorus. Ha! Welch ein Augenblick! (Pizarro, the Watch)
{"copyright_id":"0x964bdbfe6c3a10688564966fb29a4112b7c5d2ba63e48a1e9922ea22206ab77b","isrc":"HKI199925413","name":"Fidelio, Op. 72, Act I: Aria and Chorus. Ha! Welch ein Augenblick! (Pizarro, the Watch)","registered_at":"2026-06-26T19:23:32Z","spotify_id":"4Bs3s2FUPXSUNuwVZFkqd0","type":"track"}
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. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/4Bs3s2FUPXSUNuwVZFkqd0.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/4Bs3s2FUPXSUNuwVZFkqd0.
Fidelio, Op. 72, Act I: Dialogue: Hauptmann! Besteigen Sie mit einem Trompeter (Pizarro, Rocco)
Fidelio, Op. 72, Act I: Duet. Jetzt, Alter, jetzt hat es Eile! (Pizarro, Rocco)