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 0xb02a910c3278c1bd1806dc1bbefbc9acbaed99a2ade3e8bd651c8f79148662c1. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8ba526d5-6e50-4667-866f-074e85172768.json and https://artists.proofprofile.net/proofs/artist/8ba526d5-6e50-4667-866f-074e85172768.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Lullaby Dream 1 (White noise piano music)
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 0x80e52d4fc1746fcc67c6361e548f326822df63b94909287791e3679375170291. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZNWT2547663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33238be8570067b9cdbb15d603939fcac2ace9d41abe966710088651c28935e6. 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/QZPLS2559691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1babc8439a8a119b6d9685f17dcad465a2b9d5a35c0065cd395f9cf11ab1dc8f. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZTAT2572652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d9d7187c91c081df42e4102a8bb5f8c03fec9fa2c561b368e9cc01955b3bdcc. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZTB92522111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9932b579edeff53a4ed2d8da4fed8d721d33640d8b5bcac31a12fc2e1492fbf6. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZTBA2526997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99771a956b37aa2043be7000378bae9bb71794dfec6685570a7cfc474948c303. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/QZTBA2526998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x015b27f595e59372f43c95074eb84826e2701a2b92cb162643e49522818304ee. 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/QZTBA2526999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc5fd6b8b2e4984f47fca3a7f98cab7ce8234f4d7b2bddcd653044ee2b317e6. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZTBA2527000.
Fallen (White Noise/Rain Sounds Lullaby)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df0d4bfb9cff76ec1188309a59449b6e1b86aa0b94224044cc727c418dab9d7. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZWFX2569659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb919bbe47638dc368b41e4c9b9376ca77a5209193a509869b31927e023dc816c. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZZ782500956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b294474ec07535cb57b5693b7803e5a9871ef6c0d84673fad83c507b4ca0ca. 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/QT3EX2577088.