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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0994018855623d0bc115b5d4cc3cc79f9fdc3661f81decc82d8938296c5f3bd6. 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/f9f15f8d-7d9d-4c13-9649-56a79b884bfc.json and https://artists.proofprofile.net/proofs/artist/f9f15f8d-7d9d-4c13-9649-56a79b884bfc.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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939b446c8801b17d813fbe1c374a5584ff77eaf96bcb4f441f3368723b7b59be. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/USL4Q2251487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0473254dda4778f2e0863950fc4c38c7cc080a242c156b20315ddf4a7ac400d. 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/GBLLT2006819.
Non Piu Andrai (Piano Version in D-Flat Major)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10235492aa791333fe0aef46002af93eab07c61e64bdcf9b8c544817e8e2e493. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/GBLLT2006839.
The Unfinished Story (Piano and Strings Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a38befc040ffc0ab9d1296d13e5e89a3b01ab8564393d3db11750d458d5404. 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/USHM92083740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d12f85f696c0aa4059812fa9dbc252655329c372f0921f4a16c15828ef31141. 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/USHM92083741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5402b34ebb31b7cf618ecba01430c034ebb724b45888b356d9ec90ab3a6fe1c. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/GBLLT2002482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb39cc5fb52ca886244fbf542f5bc3c0dc57e611501baf50ce3ac06dc758ac8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBLLT2006841.
Spanish Romance Variation (Goodbye Yesterday) [Piano Solo Version]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab469cb905e5b968991862f406d085c87da224e215a94df4ac7939096be5fe23. 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/GBLLT2006817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c1e728926386c6021920c2a93dba7b9b6f9631b7f6697f93774734cce383674. 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/USHM92083756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77657f1734f1a0cad32f6ea8609ca0a16cedf21cbb25bdf12052ce11d4e33864. 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/QZFZ72596615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x379416458a40d49c814bf1388cce1bddacf5c55a359b038968118f6233367222. 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/GBLLT1925571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df316491a92411b7a3208f43188328e33e27677fc5a4b74d7ab611e93392b1d. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/GBLLT1925572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5402b34ebb31b7cf618ecba01430c034ebb724b45888b356d9ec90ab3a6fe1c. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBLLT2002482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7607c96aec9cc0343f9fecdf46cb656324b66e1388800be4e92de57026c354f. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/GBLLT2002494.
Farewell - Bamboo Flute and Piano in A Minor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4c5260534537217345ef2084884278daf6c5f9c1aa2550b356052b01d0eca26. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/GBLLT2006790.
Sad Song (Drama of Life) - Violin and Piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae53e55c470c1951ddffb852b1fb1102c494a0e646e78987dce26a1d2156cdca. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/GBLLT2006802.
Moonlight - Piano with Band in B Minor - with Additional Strings Parts
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa23c0a3f7bb9aa5c563e218ea7dcdd0c528038fc4a50548ce1e13af2bd511d7c. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/GBLLT2006811.
Spanish Romance Variation (Goodbye Yesterday) - Piano Solo Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0473254dda4778f2e0863950fc4c38c7cc080a242c156b20315ddf4a7ac400d. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/GBLLT2006819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2abb000573c7701c42ed6b44c79ec57dca4591c4859099b421da43e0292abd0d. 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/GBLLT2006827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcedce7a70a65fa35361435b4149aae45b638497ef20e61459395b932671dd805. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/GBLLT2006832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd0048c7fb7cf80adf2aeace0908febcdc6c8df06fb6f6d099fee1c8f62e911. 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/GBLLT2006833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f02e672fb7fdedcf39c883efeea1f9a403f06adaef90098e3b8bf7377de566d. 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/GBLLT2006834.
Non Piu Andrai - Piano Version in D-Flat Major
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10235492aa791333fe0aef46002af93eab07c61e64bdcf9b8c544817e8e2e493. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBLLT2006839.