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 0x8584b26a394e8c73a0f8971d77b4708f9e9d61911aa4fce063168911a4a080e8. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d05e1ea5-db07-4811-b4cd-08f2342e1479.json and https://artists.proofprofile.net/proofs/artist/d05e1ea5-db07-4811-b4cd-08f2342e1479.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 0x4637b942b026362756fbdadbd0d2093189a8f95dd422abf3c864af952db94a1a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZTBA2374791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe9ff2394ca98d4d6aa9f07544bd22fa06584d84e32fdae4bc89887e3775637. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:24:46Z), 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/QZTBA2374792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34fd106c9cb638ede38d4ad9ca9b717027123482228232ea161bb7b6b91c0d8c. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZTBA2374793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9134a958d56b9e97486ae5bd29636bdf889cfce43483a479d4ce6d28a77bbdb. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTBA2374795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89eadd733148e480efec7f6cfcfe5c26a922274263eb68200ccc14669939a344. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTBA2374796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcff9bf3599df4f4a1bfae691c995372c43cd4971eb379e86f0f059211c8d0b9. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTBA2374797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e51cc6afb760ce254ba7a0e37ccc3deba215a2bd98259749aa2b49a20829244. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZTBA2374798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b47624b1583342b30af2d5fc4c3adec66438169beacc7ea97b387616f781ff. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTBA2374799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342dd368d88fe2e98822c66d2bb3f8db30b14390a65acd88940bef3a78f24478. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:28:08Z), 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/QZTBA2374800.