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 0x08c119ed6a193f95c037593310ccb14869c1c7b318e37323e77c286d5644a032. Chain 2 (Bitcoin): anchored in block 953877 (2026-06-16T02:39:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/03be1f2f-1b8c-40d9-971c-3eda6a61aa6c.json and https://artists.proofprofile.net/proofs/artist/03be1f2f-1b8c-40d9-971c-3eda6a61aa6c.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 0xd3dddcecb6c3fceeb6459674d56d9cfe0400e8f35f8bbff3c2391fe5a4ce8fbc. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/AEA3A2172774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x706408cf65776a36e3e637ce49d937da76cacc58eb24bcaf1fb6b1824c601074. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/AEA3A2149064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d2d55570040d64f8000b1ae813d483afe5e5e4364006ddfa4acdb4cbf4c900. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GXBAV2190457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c6ae347f1c7854426970ba9558cfda8ac36b634488068844600e5b598591373. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:12:31Z), 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/GXBAV2151186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd476eceb91ada2d20cf3bfd86d45451ee141f6b4a23eaea694cc45d67464f763. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/GXBAV2117564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced8cec08ec2b03a47e0684493ffff62fe15f12d432977eed73a22bada92648f. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/GXBAV2137225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf63f47c7d28afcebd397fa424c1b2afb5bb0d7fbf9f4e642622f0540a3a57b. 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/GXBAV2167052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5627b3d59ed4019026fea72de11b87a745b4341d1de34f5700094a318f8baee0. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:02:37Z), 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/QT5M32538406.