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 0x680d74cae13d208126af60f6ea5b2d92a28a2728a9462957ae0cc78106b1f051. 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/f51a8326-89e0-4ff9-a62e-4bb68df79c45.json and https://artists.proofprofile.net/proofs/artist/f51a8326-89e0-4ff9-a62e-4bb68df79c45.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 0xed474a9bbd1e10f41985a0f7f30725a2e38966b8e6670d539a5cbe7d115f3010. 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/HKI199598102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x919d4a108a80dcdadf9363a6c360049c714035dae7b4c05d2e3cdc4ec5601cdf. 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/HKI199598103.
Sonate für Trompete Nr. 4 D-Dur: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe63b621ba96ca27a12dca6ca54417f157083c78f92b2b6c77864c69a4665d5. 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/HKI199598105.
Trumpet Sonata in D Major, Z. 850: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb454a897b28d7a969b379cf5a6e35bb0d4720b91b2bd91ea8957e761210ffb28. 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/HKI199598109.
Trumpet Sonata in D Major, Z. 850: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf0dde1707cb8a0c6cf19c7f03ea8f54117911bf90eeacfa01ea6d32324068e. 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/HKI199598111.
Trumpet Concerto in D Major, G. 28: I. Allegro - Adagio - Allegro molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc153265e2e58eab8061c2b3cfffb49476e8cdd47bd8581356acf6458e2a5fa11. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T15:37:49Z), 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/HKI199598112.
Trumpet Concerto in D Major, G. 28: II. Grave - Allegro - Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0d024018f98d253d9bfe813aa83cdeadccd93fe22e34f1e4d2d5c03c5ec0c7. 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/HKI199598113.
Trumpet Sonata, Op. 3, No. 10: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cac46778cd0ecbe698387566f374c20e36bfb365de9ac1863d0f42a7a886b14. 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/HKI199598116.
Trumpet Sonata, Op. 3, No. 10: III. Grave
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c7e270a32531695bfb1a747b8494ae9a56ee179b52f8804c86ac31b939302c4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HKI199598117.
Trumpet Sonata, Op. 3, No. 10: IV. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1d6a5a82940d181a7306df76eea7d4709e3aeadec7455d272df7e76c0cb607. 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/HKI199598118.
Sinfonia für Trompete D-Dur, TWV 44:1: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0405355db7bd159861edff9c95a4e4319034d70f547c65901495f1b6fc45df30. 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/HKI199598120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2000b51c23e8f4df000b857ae9b59ef61c8580994b95a336d9351db3300fd0a0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HKI199598122.
Wassermusik Suite Nr. 2 D-Dur, HWV 349: I. Overture
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10ade00df3d29d743f5747a1ea45573fb154720a167f79055af915e07c34bd5. 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/HKI199598127.
Wassermusik Suite Nr. 2 D-Dur, HWV 349: III. Air (Menuetto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc3370bae868f2cf385035b40a6e2d2189810427cb976e1bd4692143c84986f. 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/HKI199598129.
Wassermusik Suite Nr. 2 D-Dur, HWV 349: IV. March (Bourree)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84cc471c1707c1c127281a7050c6c0da487fed101b87dbe7af70a43a0db97f26. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HKI199598130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb454a897b28d7a969b379cf5a6e35bb0d4720b91b2bd91ea8957e761210ffb28. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/HKI199598109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf0dde1707cb8a0c6cf19c7f03ea8f54117911bf90eeacfa01ea6d32324068e. 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/HKI199598111.