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 0xba9d5f42a8b78a43896852816b9d717432c8ae1d3ba81ca0f08a94da8ac98e13. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1c83df2a-f4a1-4133-8ad6-1c6a50479a54.json and https://artists.proofprofile.net/proofs/artist/1c83df2a-f4a1-4133-8ad6-1c6a50479a54.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 0x7d7bb7c6bc1f2aa5175bf6858f417605fb9f6dc55450167a5c06a87482a57e0c. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:34:26Z), 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/QZK6J2004659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc60733a0f85a8ce12e7e2e662e20c02d8c26e48b810193b80bfcac0809c5b0a. Chain 2 (Bitcoin): anchored in block 957692 (2026-07-12T10:37:51Z), 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/QZK6J2004660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12140af301888669ab24cf76ed2dfeada6eb2f4025d797e964de914a4a2abfe9. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZK6J2004661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12580c1f67f141e00e7621dc11e6261394a49622444479d29ef266c56a88ff9e. Chain 2 (Bitcoin): anchored in block 957692 (2026-07-12T10:37:51Z), 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/GX53U2077855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547475861919c9e1d524766ab2d89fb4319de0b5ee1107d5088ab62d8654262f. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZTB62375759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb50eda904d1f829f092080801be781a41a4037880548f828f6282e61a6d15c. 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/QZTBA2362675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7cc63581b45669dc11149017b3931bfaec21bce150e97eeb8294a896618937. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:32:48Z), 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/QZES62420139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571d65a7e39165065075cf567391d118018d38ceedbb20209513cc43a9dd16b1. 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/QZTB62499118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51395bf5e6d7171938d3b9ff4fb6a4a83a27f4ca6cb73d90a687f5b67e33c846. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTBE2413058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d1a35f414628929980959b85e567d3026cada2b4e37befe87c0e63e730d2fe3. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T03:28:02Z), 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/QZWFP2435228.