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 0x16b4b8e4854fcab4a52d4afb5be790f343ee460cdd6dd2fca10910d71d11ed53. Chain 2 (Bitcoin): anchored in block 953599 (2026-06-14T06:43:55Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0dc66ebd-9986-4367-9175-f42a4b7a8ba0.json and https://artists.proofprofile.net/proofs/artist/0dc66ebd-9986-4367-9175-f42a4b7a8ba0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Melele Ea Seakhi Two (Kebona Leeme Tseleng Tsaka)
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 0x18989a82d5ace51098760733fffc541c51c9fc91907aa78ac600ead47fef7094. 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/QZNWZ2568727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9199130e1c5d0010d85b99ad33cefb0856697ccc3adde0241e76dce7546b4b. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZNWT2472597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6251c01e205fb010f52e672ce800710908b9f4118d84f5e3e1a7c0c1abb9cc8a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZZ7K2493226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd64e4226ce1eed08756a64164fb97a89eda87d9a9ecc46256777f89b44ba8fa. 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/QZZ7K2493228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe15dbf97497839ed0f68778bb974c7ca0a75b2b59e43cac3d7b2a2a2927fde. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:30:17Z), 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/QZHN52529469.