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 0x191595f1419ddcaf7ad398ea67c1eda520958031ab741f0feea69b04f22eb4ca. 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/f170f927-a493-4a0b-b8c1-f66431b002a8.json and https://artists.proofprofile.net/proofs/artist/f170f927-a493-4a0b-b8c1-f66431b002a8.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb9eb1fc562174316a5729f79b90a242a55f0b2a0cae7f0a29afedcfd3680e20. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:08:27Z), 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/QM4DW1564028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7530013c5050e133ad879dc5b4ee0c50243f21a81700ed69e7ea7c354cd95d9. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QM2PV1581740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3d4406c913d7bfc8398a38e95f43600c7088a615e3054be939de9b1c216570. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:28:41Z), 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/QMPKX1521805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee1bc273915844f5b85e9e48465ca69a93d0439ecb80925f697fb6617ce3254e. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZCE61852357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a90db6e871000bc8085012ad389db146c3cbfa14f64a7fbc1ef70a65126a38. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:23:08Z), 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/QZCE61852358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207f33203ef3895b3c7a9e001463fa6282071ef57ed98f6db2f381e3a0e6714b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZCE61852360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe717c631301c9f56eb2f1bd589fe651cee31bee1275b72309826436a22da6cf9. Chain 2 (Bitcoin): anchored in block 959011 (2026-07-21T16:21:53Z), 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/QZCE61852361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04c5eb6bf5c6df8cdc34e79acb8ee05408423371eb3115ba1eae6c22ded36f9. 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/QZCE61852363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa633ac2f3ee34d228cded96f5b1b4670745ede2c5ec95f7822ddc3d87fabbd21. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZ9Y21755566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e3d0180acb44f21a808b61a809837a5a89b5c19e1e07637d6a4db1dd2c1887. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZAPG1824221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d86ec46673405aca129b2652204401fef0b3fe8dcbe49bc449b68a3c50a0865. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/QZAPG1824222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8860a142bd0548658d2bdadaa542592c1c6063044e075771807b1dcda86eb25. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZAPG1824223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde1d668c4441b21676f37c755889e5eb53a7516133daea9120f42c3a28d8472. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZAPG1824225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403137a50de44be63d6839fa9328b31808a11ef791da6e8532c7bda774d86995. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T08:31:59Z), 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/QZAPG1824228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cad86a3f9ea121cbb134369ff8e5ef89944d36429acd018880cb90c76b2da4c. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/QZCE61806537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3644e784546a8bf0f1bb5b568e1e48c3d2186fccb9ef23ec7e80729f557ee7. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZDA41881485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccdeffb4752f4b88123dc2ac1b5bad7d99def02d57240ea6f4295a7e4e208bd5. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZHN61919308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a1318c6d910c2be3e80021d255bab401d933bfa5c5837751a021a9a3ffbf96b. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZHN61919309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e3d4e3ee82e7ef139d017ed96938ef08e9d38f24d9e23a4956093f3be2c043. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:35:43Z), 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/QZHN61919310.