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 0x48158972684db67109c9cdc8b69d925d339cf615e48ef5759df65ef0a10c7860. Chain 2 (Bitcoin): anchored in block 953687 (2026-06-14T20:19:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/671a7b1d-63a4-42ae-9947-9490bc5398e3.json and https://artists.proofprofile.net/proofs/artist/671a7b1d-63a4-42ae-9947-9490bc5398e3.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 0x428b69b6a51c1517464d3def2eaf9633252adb9ea1fea49dabf731cca024b05b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZNWY2146145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58313e1ef94a25bfc3ad382a6ec2bc87fe36ccee24ed4aaeed9a23569e105ae8. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:09:38Z), 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/QZFYX2245523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba22deccafa7c059da95327387f05efba0255425acd365d7b668f4ffbd020cf. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/QZNWQ2396252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc878440d4169c9ea89ba61b71ed0185e694402dcbdb178b16073163d6da205d. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZHN92432062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d01387622490df540d7fd355f3cb556b394fe239a73d4ade0ba86aa896d9aa8. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T02:36:23Z), 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/QZHNA2482982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fb6acfb7b065d21b08fd1e722c96e64e74eabeb3b894f5069418603d3b7a147. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:57:23Z), 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/QZTB82443795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5940495e6f1324acc15bcbe9b9bfcfe7e9a7cd09043c3f2cacd2a748c95369. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZZ7X2430536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x023a9b6a9dacb43ccc6d2dc9cd08ed4ce421fd7f04e0cb64c214bbfbcfbd9072. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T02:05:10Z), 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/QZDA42512917.