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 0xd73576a07f4af01aa8e43616f89a5964f31727850b6a6b031682c0d0935e4b4b. 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/4b86ef65-62e3-43bb-bab8-fa511024a16b.json and https://artists.proofprofile.net/proofs/artist/4b86ef65-62e3-43bb-bab8-fa511024a16b.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 0x854b998436be16340f42fdd7a1215a617f08231fa543b0156f6b187140f31b16. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QMXDC1100381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c658ca39403f139d63c3dc8bdf4ed828196563020ec4fd5a275944b5efda88c. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:27:38Z), 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/QMXDC1100383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa87212eabe6a8fb1e16ed1cff0c7b034d5aa8747fb7163dc47abe46ab0f6c421. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/QMXDC1100385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc083999a61e8a0841fa20372f2cd11aebcd84074aeb2b958a3e67c37601e02. 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/QMXDC1100387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d6d844ac53ed77f5d65d2599f91d581d85cdcb124caf91ba85554b44ff1bdb. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:51:32Z), 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/MX3192305315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9def5cc5baad882bcb8f83f16e1ab48b7ed36e1011a283ae05877b08cc9ecb95. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/MX3192305317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe37d5060e2e387255183a9ef21e4994e473128d2d995c382275dcf8d7e503d27. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:27:21Z), 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/MX3192305318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e6a5967a71ed0e868806012403e41d160ee15d8a12fbecb82ebfed357cc829. 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/MX3192305322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7fe95ff7489b43002f8df71d7b47887b7835b76e51edd272c1f84745e080a70. 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/MX3192305323.