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 0xbff8e8fa2b39381bad32432127dd686acc8d7426151e226f17d62f6063622575. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6cf67d23-9fbe-47c5-9d9e-bff20f626b74.json and https://artists.proofprofile.net/proofs/artist/6cf67d23-9fbe-47c5-9d9e-bff20f626b74.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 0x9be4327413303ec21e741f81f94d87099d6e9c8cd1723b3e5aca1fd156e3496f. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:56:11Z), 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/QZWFQ2375342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e24f1892a5dbde87055ec6ad02ddf6d4fe128ab3ebd9cc99170b5c9cdcef243. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZFZ22492953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee197ac176593eeb235d5eb059af9028d0af82397f28b0a5a0b92605fc72a7e. 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/DEZC62493789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88916a17053fcbe653fd97b035c27055d477d3e532950e332fec4042992db93a. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZFYZ2433678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b5f2f597d7d9c6ca519a9315de3581bd370934f47d54b79e0b58b334bd5bdb8. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:26:25Z), 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/QZNWR2459634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7131f1c707f00bec84de4d35f0a0057fb57046bc11ee7e3a60b9e55bee6110. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:43:24Z), 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/QZTBB2490740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ca9e83139c8c3bf43541f51bbffc595d6f01316d8c9ea7bb3f3cb0b4344470. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZFZ62536687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0458c6f4a14318b6fb1451de58d9242a7a8b552bc049ab086a69c2e42d18cb1a. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZTBE2574627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ce87acaf88f896d955795f08712b53e801e20cd5445f9680e331f241327c79. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZZ7M2530768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dbaf5cb7fbc394637e1e53db402386e7b824c1b33643ce4c883fb8dc844d93c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNWX2591404.