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 0xb379f4e035df0946636d7f2b9ccf0f6321862c97518e1e74a3b559c03f7c9cef. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8dca0623-889f-404b-892a-d833d7e8a9e3.json and https://artists.proofprofile.net/proofs/artist/8dca0623-889f-404b-892a-d833d7e8a9e3.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 0x0f0b114b572750e213e26fdfe9f50517b9a5d9050433012b05d745cb46192a31. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:24:57Z), 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/TCAJW2570784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd646882516f4f3504da13734382d186b3aba238f9a5c4535994a009f748b70. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:24:26Z), 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/TCAJW2570792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6035c5ce2507ce1344dc2754168b8aebdea3d4b1642c0608352dd73619c7cd09. 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/TCAJW2570805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba73a7288786547fd652129947343f1589d9fdc924b95b67206390a2d9908aa8. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCAJW2570808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca47ff831d552522149605db45be30b5713c2593c04f6562e90403488c1745a. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/TCAJW2570818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf432530131ab2cc6f8d4a10eebaf71df1616294e848d7d11c141eb135cf5acca. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:04:58Z), 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/TCAJW2570838.