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 0x32d59238c9bad4ceb5addfcaae46b304d337365e5411834ad10324d1750e68bb. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eb5d6358-49ca-40a1-a659-2c2ae510842f.json and https://artists.proofprofile.net/proofs/artist/eb5d6358-49ca-40a1-a659-2c2ae510842f.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 0xdd617fb966a92236dd222248d3da27e8a989a4255ce8956ec268a0b8ddee08e9. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/DEBL60697205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b76e3c4cabb01e61be1e14fb526150d2e0fd0796f053e7b81e21140c717ec6. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:07:47Z), 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/DEBL60697206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f8750755f9b26122d96c0daa7fc90a178c2704fe044ce7408dbd08df3e0e03. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEBL60697207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c1b9238c86edf20214b1bf00410734f561cc457c93d325da2ea11f7c46b58a. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:01:56Z), 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/DEBL60697209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1571007c65fbed5941baedc79c004690563a3e24492acbacd3aa4c826bd262. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T01:23:33Z), 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/DEBL60697211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb59ba66dde3d6469a4755cdca8930daa2334e14475842c60a430434857573fe8. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T19:28:47Z), 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/DEBL60697212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6264a9034e65d63ffe22143f50050fe898015733c9fd5a37e243be26bf829276. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:27:07Z), 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/FR59R1704182.