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 0x085e653735fa1d5996b5212be83b20b344bc710efd3391bc32a391d813fe6be1. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fe7744c5-7db5-41f6-a232-a2916f4f5533.json and https://artists.proofprofile.net/proofs/artist/fe7744c5-7db5-41f6-a232-a2916f4f5533.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 0x32cd629dae7c69b17cfd7af8d1a678cf10d4ede8ea4e7223f3f4170eca80f105. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZPEW2526894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4de93463c91067e2ffe5c40df0fb59ffa516bb380a2ccc2bcca53e40cbd3a2. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:46:07Z), 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/QZPEW2526895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff18906bbe17905d0d405068c32d30261b591e6831a6d9bf781fa68e9e71692a. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZPEW2526896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c250696ef6fa76460005df41b9406bf3c8f5de1ef7926ef87e16c9cae9ef247. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:39:51Z), 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/QZPEW2526897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09eda45c3d1c0d8649983d4e95b93ae4a2985a6fe57ce6ec7f6d99181e737386. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZPEW2526898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f047d2fcdbe3fb6d4d51ee40b85e2941a7b8e6d58c01c9844f1232b710e3833. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:20:18Z), 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/QZPEW2526900.