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 0x69fc282e928d8cd8e11e80c42435d5d38e17bc8b597609162aa20ed26dc41a58. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5bca669c-c0b3-4297-8ea7-453b1c08cb68.json and https://artists.proofprofile.net/proofs/artist/5bca669c-c0b3-4297-8ea7-453b1c08cb68.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 0x9539998e9f3bc8b871c4aa9e702baa7ee6e589683bde4f7b2dc924dafdb42735. 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/DKADG1300334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeca4bbbb5f7adcdde62530f01dd4d7a217cbbf77dd75d1ef8bd3e19f02848d4a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DKADG1400098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9bf4f1586bb84fa21b88ffd5f0009cc575e8501a036f3d1c4e3ecebc4ee68e4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DKADG1400164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6175e51c653c0bc5fb50cfa5add218abc5bcccf322e3f886b4222f3e7bcae8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DKUM71400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5e67e5a6a3b34e4b4f36ecf7af0f243ae6896de0c0301422df799d666748f1. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/DKADG1400162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f739a6c025f40f0ae2205c61a5384ded935666106f7658af09fcc4c3f57e63. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/DKADG1400163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aeaa39702001f8f5c0ca6bd1686dc0745b9d6ee27cf9ddea1853708d22ad465. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T21:00:49Z), 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/DKADG1400457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6175e51c653c0bc5fb50cfa5add218abc5bcccf322e3f886b4222f3e7bcae8. 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/DKUM71400005.