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 0xb9a071281b2774fdb85614fa62473cbde86c0a9acd1fc22132a6e71bada0022a. 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/2032a159-fb76-499d-bddd-a4b789e0863e.json and https://artists.proofprofile.net/proofs/artist/2032a159-fb76-499d-bddd-a4b789e0863e.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 0xac64b594e6e08d23212165b32c082bb6bedd758bc1c6606ffc8b5978d3ed2f95. 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/QMFME2307084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c7b458a4651efd1f400e8cb5d440554870a6b770e6badac750214fa7ac0ba0. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QMFMF2307558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea2aa6452b8344cc1a43b0b2c7eddef3677943b839d8dcf69a5b502772b8bd9e. 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/QMFME2307100.
Nacht und Träume, D. 827 - Arr. for Piano and Cello by Cory Alstad and Ben Goheen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39df985dd1c6d04fbd39a4a8806fcdac6dc58c50a64b4b97d81d5b360b2a6b4d. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QMFMG2321961.
Tannhäuser, WWV 70: Song to the Evening Star
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84bd5d640a9abfd255d87d1f9defc700c391305463139f922c90f4d2bb09d12d. 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/QMFMG2321959.
Nacht und Träume, D. 827 - Arr. Ophelia WIlde
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39df985dd1c6d04fbd39a4a8806fcdac6dc58c50a64b4b97d81d5b360b2a6b4d. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QMFMG2321961.
Lyric Pieces, Book I, Op. 12: No. 1, Arietta
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f3cb34224d4b3c184a7c47f66b19ea48d4ee9c9bc6193fd2ff3439f65dda55. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QM4TW2423477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774e151a7e539e6f70cbfa0e3ddb4afe3624cbde99d9b76f56ce7cc9310a100d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QM4TW2423481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d2a5d29ed110662aa6a93ec05b51c0645f705c5a6e55e13a4f10269a13b37a. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QM6MZ2423976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb27ed0a63ea69e488d677f86a10317d51f767e73a7c65d05fef5de07f46f49bd. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QM6MZ2423979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90844baa725d2be38754ad69a09a84be55915165781f9f2e05fe7cb44a89a94e. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:12:43Z), 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/QMDA72414522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd73907c8f4258d6529b746745d3201f84a3e231b9dd1f7b75d25d87214e8fddf. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QMDA72482275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4692ac230029abb2cf67e96bc75dc2062ea4008aee8be8eed2e1dae69cc26958. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/US38Y2565413.
Aemeralds presents: Library Aesthetics, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac64b594e6e08d23212165b32c082bb6bedd758bc1c6606ffc8b5978d3ed2f95. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMFME2307084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea2aa6452b8344cc1a43b0b2c7eddef3677943b839d8dcf69a5b502772b8bd9e. 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/QMFME2307100.