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 0x6c6c5ffe6abaa4df1230a581fef75e4f27d738369045afd12dcd967ea142201f. 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/e4e14dc7-50f0-456c-9d63-1bb925ff8f4e.json and https://artists.proofprofile.net/proofs/artist/e4e14dc7-50f0-456c-9d63-1bb925ff8f4e.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 0xb7b8957c9bdcb27b187488b187a842c5f1e9069a5a9d1a7aacda86f970c60cd4. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T13:52:01Z), 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/USAXF0510415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf5c32a694f5e7b56732ade406c7d45ece1876b27d70772f22f75bf6b9d4164. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/USAXF0510427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3edce2906e7494603b86f005e7b7baab5a1f7106d329db9fd1a3d13c7a39ba2. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/USAXF0510438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e51b88eac7c5c131cfbc0bfa28ad67c3b17519fa9f308caea653a1b287fa51. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USAXF0510440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ac8a5202ad7b303236f6a3ca22098afa32beb2ad925b25c24df7ff418c924e. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/USAXF0510179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d890bb51f022b8df3d6c6b837d5f8207cd870eeb89822d8b9fde1eca754280. 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/USAXF0510181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fbf05328efd6da6a5ecb871a54b1a427f5122178e9261343d0be93107d80355. 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/USAXF0510182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0ca432045e0f47589c7c959a3ea0fc68a51931451f90e4a6dec2b04db88114. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/USAXF0910067.
They Tell Me of a Home (A Celebration of 40 Years of Song)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x157d7b484786ddbcc04c7982f2a1d7f20a4cc1750f7a75fbbdf701330c81bfdb. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/TCAFN2147799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c146386aeac5a9cfd9328d8259271b94dbde644df9d8f364eb7b4f18d521ba4. 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/TCAFN2147806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37eecf50a31296d101c11b5c030a6f21bbe6d748615a8755cd6593217bdcc19b. 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/TCAFN2147817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecdb5af7be7379454fb23d0a3ac5b9c03bdbbc4532c0a96093561bbc3bcca1bb. 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/TCAFN2147819.
Drawn Back to the Table (Through Him, With Him, in Him)
Hope's Song (feat. Danielle Rose & Emorja Roberson)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x980d694be627a4d99b382b82cfa9e98a92c105812837261d41d58f45df4a4f39. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/US38Y2422118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d132ed374f103f898062ce88655390acc788ec19c908ac5fe26ac8d3b2ce74. 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/TCAJM2591989.
Lady Bird - Soundtrack from the Motion Picture
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7cf4aece8c01f2eec00cdb2da0feedd4eb33abfacd1f1b3db7dd90fe53df79f. 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/QMBZ91764424.