Nat Bartsch is a pianist and composer based in Melbourne, Australia who creates lyrical, meditative work that explores the space between classical and jazz genres. Bartsch has been diagnosed with aut
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 0x4900a9ed66120d36fdf7b90ea1cc34072502aea20c2649401c956096836db335. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b41a267a-c60f-400a-af7f-9c9cd420e0a7.json and https://artists.proofprofile.net/proofs/artist/b41a267a-c60f-400a-af7f-9c9cd420e0a7.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 0xc6d413fd370c0ad704c216e67758ec99fb66413f77a17dc84ba618f0b7ae1099. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/AUAVB1700102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0e6ab834b4c8b5df223e0714f26ab1c4b0fbd8633ce74f5bd7804704da4f58. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/AUAVB1700103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f33538e46c494f529956725c579c18c04b6432f1fc8cfa2b4d6a3a1f48cfc66. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/AUAVB1700105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51321b9d747079ebd0163d0cc464e5a71bd636ef6b26e00705260b5d1817d2f2. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:04:38Z), 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/AUAB02050190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7522e959183167539866b58a84d5f6397bf7c55bdd9666e8ee812e256f85aac. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/AUAB02050167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f5f236e967aacfdaaf768d233b0c67847bc574e09781575cd35d9d0d9b9dfb. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/AUAB02050170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafbfe5dbdeead7b732edeb7db811e1a877381b8c6c1f7e05c8917fc06ce6cdfa. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/AUAB02150007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5ba7cdcc9e729565b481aa8ca3269d3f6627a1fe71e8b28caed744df3dc7f4. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/AUAB02050189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185b29fb4a368ef3d89a758ef9b2d66d3f1826599c977d8c38a5cd16d21888ad. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/AUAB02150008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8cc32805a73f4f6fae86ed02a794254c9143315bef8e178f9788b4df4fd10ff. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/AUAB02150009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802200c30fe40fb70c476f159de8c53294762f38605ff0ca087abca955f46388. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/AUAB02150010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e47a35ed296095efb8d1cef7f5b9cd06e4bec86b526e37c42da11f4b9dca2c. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/AUAB02050188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc85acde073baee68a85ec9c3af27808d0e9fff780738f4dc10caac3acea1fe65. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/AUAB02150012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7a61f5f9ff1ef18ce0f7423e63ec10088a71230985c54dd0851b8ae2167e81. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:41:22Z), 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/AUAB02150014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef4d603a5b4f8701ad2b7d30224231cb1bbb05e36223761cad4b543fcb604c5. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/AUAB02150015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52ce25c9e664f6c5347821ef91d9641938e298370a1fe66cafe98aa83a6ee41. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/FRIDO2111669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe05026532879a6e99da3d13149783836336c7d8a607d831317c3fbbb4012bc4. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/FRIDO2310035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55bb1c1cc83c0c8311565fc76ba551dc4dd5fc1358a5c97e91b0603995d7c330. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T13:47:18Z), 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/FRIDO2310486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed29ab6c0be4eeaf5e5bc40496ac9b1a827b0c966c09e763e838d0f6787fc39. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/AUH8B2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5e803349d031b406d0ac6726c18a9b134d31c75b83f9f181395d7e761710d2. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/AUH8B2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050b205811439e02fd522463bff5c2fb66b518c91cf56e04237d14d81827648d. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/AUH8B2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d9152bbc1965aa519beffc6a240fb603f85ae2b61705d2a165e5b338b6485d8. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/AUH8B2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5665d7ded52e117a4e160c7231d33e5948df6c263c4e9f2623441c5eb5c092e0. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/AUH8B2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f2f4c75d01f254c7eb45d911e514bbc105f0969d3bba7abe76ff719120c7e3c. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/AUH8B2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcef22485f6d7a974114639fe37f3fe70b0b63155afa37309f673fe1e00843f7. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/AUH8B2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd733c4c1d97eb7c9ec52631b93f409a4e77c58d81477d167aa1d523aeadabd18. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/AUH8B2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966df1f36464630e88aac5e65cd7d77881a4f0fedaff931461adc45efab823b6. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:24:03Z), 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/AUH8B2400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97be5fa65e77417282c9594601dc73f9dec889496782e20b0c4d7b790d00e0be. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:22:06Z), 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/AUH8B2400019.
Classical Music to Lift Your Spirits Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802200c30fe40fb70c476f159de8c53294762f38605ff0ca087abca955f46388. 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/AUAB02150010.