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 0xdc74ee960ad76e3581079ee772428b79fe1533addeeb89368cb0ba46379f022b. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f8897439-a390-432c-a9b7-47d6f945a808.json and https://artists.proofprofile.net/proofs/artist/f8897439-a390-432c-a9b7-47d6f945a808.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bad Thief Good Thief (Original Television Soundtrack) 'The Score'
밤을 걷는 선비 (Original Television Soundtrack)
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 0x5e6ec66fef6673f5e419347418ce50e780d5ef91603a11584e5482d61676740c. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/KRD451802390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee20b00ba7d2b6c73a69410a3a082c2022d4143ac427dcb7fd50b14666b236f. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/KRD451802391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7332f73086547fa4bfa494971f9ec81a1c61a0066fb02bf5d5716470dc4f30. 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/KRD451802393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8608882cfaa18491a0e07dc9e2b3e7f87488a27bf061e1e650029efa3033a463. 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/KRD451802394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e8b6b0af81a3355cc5f022c4fad7972922ce3e04fa7f82a4c616ff229d5682. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/KRD451802395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3253c85424d2a0a5a4e4ca131e5acf9095e378236aba8a828f8630c8180df2b8. 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/KRD451802396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e36680c151757691e19f918e3e749f0a483def45b00bb74df1a62ebebb6ac3d. 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/KRD451802397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab08bc4a2313cf7f9f2d6205b06ed9257697e2d458611bcc454b8d3ad6c5f0d. 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/KRD451802398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109b496a8157e28a4e453fb0c58d1600a0fe2c79f0d92faf839463d8404c51a8. 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/KRD451802399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fc3825433dd7e63bf4bf612077a10d7bc3bf4ef9a36cc4ff1721c4b84a4a3d1. 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/KRD451802401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5dea34c29a5bff42470fee4d82a78cedb3fbd92f883244449506fa4776611f. 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/KRD451802402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ecd0de72f3f40e6c41687a34c445fbdc16fe849a9b49592fee668e1e011cc9. 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/KRD451802404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8b38cc4f34c4c489ace75bf623b501345f4a9404ab70f521595b2523323a92. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/KRD451802408.