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 0x25b6ae09c32275964679a916bba35aae9ba47758d69593b1b48ec096f4552ed9. 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/f12a866f-0825-47e7-9dd5-aa1cffc6b4d2.json and https://artists.proofprofile.net/proofs/artist/f12a866f-0825-47e7-9dd5-aa1cffc6b4d2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Kitsuné Musique Mixed by Maximono (DJ Mix)
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 0x2e95027fd3adb3d96e888746330b22a237d229278a5efdbf7d2ac92abe1c1d3f. 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/FRU702100017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x497b23e244bdf3d3db472c100d9cb8bea5977c24aff496f9203e62f5b118265f. 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/QZHN72434597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x250438f79cca9ad9006c2550a4a87cfe69ab2fb15de993576790288e0d958a52. 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/QZHN72434600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b8bb9e3ab744f404b3935a12469ae663a133da59fa3d1cc357aa46431d65ef. 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/QZHN72434601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x446c30a3d89cd9b062261c37dae78b6668784239d34aa7148e42a32aa2bbea01. 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/QZFYY2087175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb813e8faf5e7e266a3424a368ce752e270c3304de922d7ac46e11aa66d4fdda3. 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/QZNWT2058015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de1524002b48210b241e55d4f03393ff2810d528ad132cd1a7fca2498fabc50. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZARB1848552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x001240ae912fbcf957d6d7cd61a38488da65a681ee094fc8901bf764ce4f0ae7. 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/QZARB1848553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ebd31036da9c61233576177654fbc67c774b277b4f2acac8f4079288ce78a18. 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/QZ9Y21729524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8aeb03e1ca679ba1be6bbfdf011da33a6a244331da36294a97cb7ff5dd55044. 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/QZ9Y21729525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d4e666856d5cd46ad912cf838c1a6b0a103647201b7423e0624937251cf641. 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/QZ9Y21729526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd39029b85a8ca93b1f793d512b9d5fa4c0282f73e23555b7b43ad3ba6f3ed703. 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/QZ9Y21729527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32aa6b33c05500cf66f0e1b0a6d51c0b91de5036a0fedd42aee1a75859ad6d2. 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/QZ9Y21729531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x446c30a3d89cd9b062261c37dae78b6668784239d34aa7148e42a32aa2bbea01. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZFYY2087175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793879a1176d9cb63c787c65f7350993e149d6ffe672880d2a745ce2558fb266. 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/QZANL1744023.
Kitsuné Musique Mixed by Phoenix Troy (DJ Mix)