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 0x2338d0e7b6b997b80ac92b2fbc89e814fcef79b86fcfd0116f2acfea196e8312. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2e1a6659-00e2-41c4-a25c-c23500c8b69b.json and https://artists.proofprofile.net/proofs/artist/2e1a6659-00e2-41c4-a25c-c23500c8b69b.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 0x55777253e328bc82fdacfa699ea648e0a8cc57c1712b0bfe0c7a3065450c08c5. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZFZ72320473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe4c5d4d3dc7d8d9b23db353a6f595d9309aadb0c43d86a5e060bc8ba2ddd5c. 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/QZPLS2334008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aaffa2593d7c6a9cd0739efff59eebace7351a386bc70280e2598ac78059802. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:21:05Z), 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/QZPLS2334014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c9d4e922988cacc02f70d2a9e7614b216e9f56b811e05b6db82ea203ec32d4. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNWV2410324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86691fb46a6df461bf91ca3f2142c62257dbe8f841f4a179525b5650b65b5530. 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/QZNWV2409203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ce353e18d8681cf8eab003390abd84445f183ab8d28544e223aef5723b4af6. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZNWV2441766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe86688bfb6e50d579d7bee3787da579af200974acea707265da7477c9a279199. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:32:34Z), 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/QZNWX2457533.