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 0x4f9b16416518fd93138f1456010ecf0a45846d070c9da349fed994c81300c061. Chain 2 (Bitcoin): anchored in block 953636 (2026-06-14T13:03:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/35c66b09-40e6-4b83-af0c-a1043d977e46.json and https://artists.proofprofile.net/proofs/artist/35c66b09-40e6-4b83-af0c-a1043d977e46.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 0xb823da4337b26feef8db17dbead188578561e3f5516d5b4619977895eb5e7700. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:53:16Z), 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/UKXN22394035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc922e9e4981452c715fe8d951e69b1dfcb9b2e86c7c50b0988e027efb87e16dc. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/GBLFP2400284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9972e397d979fc36c35313d0f3cea251f30eead5f482feca9594eb75028ff2a6. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/GBLFP2439714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e29b4614fe855da3595e228706e14fe6a6cef6225e0ee59b197b88aacea2dc. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZDA82501923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e7d708af4b08ea5edfba7bb0bc0364e6da86ca0fad0c78f6ebe4ab5668912a2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/UKXN22423478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdcee42080be43bf4725d9878f66ca1efe3e2c3b2af45d051ff11849abd75394. 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/UKXN22480889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5276f70ce70913f62b642884505593e57f78ea8350eb5381f1df70ecd50e8499. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:33:25Z), 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/GX53U2343791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc2ebaddddce40643563ad141218ca5a896aed1092275ee96c53cbeab49d6ab. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZHNB2597216.