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 0x9f68730fc42ad48932821c726578eaf86a988d21424e5ee6a688c468eae2d4d3. 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/83a61fdc-31cd-4351-941f-6141228614ce.json and https://artists.proofprofile.net/proofs/artist/83a61fdc-31cd-4351-941f-6141228614ce.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 0x98032e716508bc3455cb34152536f80af23c7a71b7bb2e1a42ed60aa873180d8. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:15:43Z), 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/QZS632392171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae8b806e300dd0c162f218c3aebd23a98e7d33c328c751e0cc66eae03b08baf. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZMHP2396579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68db7f97b1d60814aafd130156e0a037137ecef2fb969228adf24dbec67a515d. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZMHL2356115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ac7c6be1418d178bd06b5ec4bc93b53dce207d8124867dc70bf8af07153483. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:27:25Z), 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/QM42K2307322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b3d4ca939fdcbf5c77173d7f75ec53a22830afaf4be8eb8e284f2d9964ae2c. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:38:41Z), 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/QZMHM2586420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x788b4d982807f7eb6cd1c80f17a6a3a7e62fa0cdd792f70b35220b5eb705ecef. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:49:25Z), 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/QZS652532100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c77c53273be4331cd47a1ea1ea1409f0eb0d30c7c04e68f91a398b74de3e6d9. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZJRC2583061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400c5a70bacdb0fbfc2f1f519d768678b3ad55aa02851b9e4a8b2d057be701e5. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZJRC2512581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe960c63dc826d914358899056beb4f26a64797ae97a9cd93b241398b3fc7d435. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZS662566576.