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 0xe130d73d4792964e75ea4c6b8897ca2f8142460b1b40dad1e118bd2596e8de2d. Chain 2 (Bitcoin): anchored in block 953691 (2026-06-14T20:39:17Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6b29104a-f7f1-4806-a805-ce5e6abf4d26.json and https://artists.proofprofile.net/proofs/artist/6b29104a-f7f1-4806-a805-ce5e6abf4d26.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
We Gather Together / Tchaikovsky's Waltz from Swan Lake
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 0x1ad9a5e9fb140a144e4b610007eec98eac61a571837c67a7ab95040db9a5f27c. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USLF50801037.
You Are My All in All / J.S. Bach's Two Part Intervention no. 14
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8762ade1a19c8c984f04e65bee3909ecb9c9cd9fdfae37dcb9eef1a486188727. 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/USLF50801038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f2f2d90096c7e1c66ac9e6d239a20cdec1c25f955796acef1caf0b6779092d. 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/USLF50801039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8acadc3b6379396df6c55fd0bad3f5b65cf8a68b25630805b16abf185309a812. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USLF50801040.
Praise Him! Praise Him! / Beethoven's Vavace from Symphony no 7 in A Major
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff3a0bd469cecf3b6dd9f3b4a1aa137c8e53ab15b1182aac367cc22aa25da76. 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/USLF50801041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff66c8025136691ae8a5f05bbb33fb13a8a83ee514ff198ab79891207d1f021. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USLF50801042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ff3200ff0cfd53f7707a4138942e7fc46f4e32bbb5d121b7d5261f18ec94cd. 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/USLF50801043.
Crown Him with Many Crowns / Mozart's Sonata no 3 for Piano, K. 545
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a22fe0cf7bc9c68d054783b037baaa823fbc6493e4dce243d2d2e998241bcd. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USLF50801044.
Holy, Holy, Holy / Bizet's Intermezzo from Carmen Suite no. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a4eda4f08a10b73123235ad3515626b0492c3dd6d14bf58be3edf49ea8672d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USLF50801045.
Softly and Tenderly / Grieg's Morning from Peer Gynt (feat. Erik Gratton)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e6b81b0d9103a21d2cbbe2ae3a09ee650eac91834968d04e9614e88174e287. 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/USLF50801046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0e5485cc7f441bea7e8f7f56e8c1ba67959c6e4cd629a4edd515a0e4b119745. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USLF50801047.