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 0xa983b3488057148f2eea28c42df224f7fff7586fdb3d42daf5c98260bb475ead. 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/12a651ff-bf1e-41ec-bd55-daca43e9c993.json and https://artists.proofprofile.net/proofs/artist/12a651ff-bf1e-41ec-bd55-daca43e9c993.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 0xad2bf7244eea41a6e81772949bb1176c0e0425677efc25921dcc650e6b0f72bc. 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/TCJPE1634220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5a1a9301a03c3e12abb770dd7a74d3d762edd0e20da8de8ab64499cf6b17f1. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/TCJPE1634169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2d4d4374b796d6d5cec44f59fc168e8952460ba73e60e7313e9839f215fc04. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/TCJPE1634175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3945f589a5b687d4b7798d05ac3a2b0b2bec7181719abac7e47f9a5be3dec4. 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/TCJPE1634177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6983396d73b706ba290e58d255cf6e7863dc7d245c43542e7cdcad32d221f400. 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/TCJPE1634221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba0b6f7d3054148bf3f37bcd4a73675b740d0729d6a8c0e9f4845616f3fdf60. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/TCJPE1634224.
Moonlight Arpeggio (feat. Shintaro Aoki)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x927768c2afc047f8dd1aa0ff3c26489bb49a59808b08f4d60cf53e067a398837. 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/TCJPG1892875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40fc4c32dba0fb4f53572a4f035372f26daae57895a4b77efc928d571c644b6. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/TCJPG1893964.
Water Surface Arabesque (feat. Shintaro Aoki)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd270494f5b43ff02b39ea57b93814fa9b4b7faef46006c41b7fb454d0e85a6da. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCJPI1958773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f024bbad5723c057458fa211713aa201e3d6a2af88913c8f4aacd99fa0ceb5. Chain 2 (Bitcoin): anchored in block 958647 (2026-07-19T02:36:14Z), 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/TCJPN2004920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd948bd8725c0917c1f8facef6a6c4f36208abfa89fe1318f59436ae6e5597ea9. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/TCJPN2004929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f024bbad5723c057458fa211713aa201e3d6a2af88913c8f4aacd99fa0ceb5. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/TCJPN2004920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d7e60292d6afdb951c5bb8cb834b76731cd809f785de323b5ba31643e8b8be. 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/QT66J2576913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90dcfc7b35e3e5d54fdbc26fc78949b766bf5cba28b0dc5b89bb77b38d8302b. 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/TCJPF1729017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfafd8d98bf1579a502a676e1f62f72780238c842fd6d3f931976d25f29f702c. 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/TCJPE1649217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e9419d96336c6e734cce2a44621d1aa6c4ab25d14cf31fff70fc0d5331b76d. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/TCJPE1649655.