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 0xa00fe92c15a7b483418d4d486fce985867821fa765981e61ed2ebb3fa193d44e. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e9e8a4a1-6a57-4930-9237-4eed327cc96b.json and https://artists.proofprofile.net/proofs/artist/e9e8a4a1-6a57-4930-9237-4eed327cc96b.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 0x088453c5e395d58397eb53be0c3a345475f990e9aec663a499dcd9cfb63ba4cb. 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/QZZ7V2460509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89855e7612229e5f074c39126475cac165c398a65db628e3df5fc5986b2a1a2e. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZZ7Q2449761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19ff0af5f0c160a6ebac5674bd7144098cddf8cbc9aeea0939fdcf151beffd6. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:40:04Z), 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/QZHN32564318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5065050299a540b32787392372413d5b4aa358d62e75ea9040f224e7044fc59. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZK6N2591119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7dca4317ca7d063ca8229075eda2cdf653b5b27cd4739da70014a6d5ee1241a. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZK6N2591120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400ce9b3028f305bafb64427f7b50820a16a705bb8e71681ed1ac7a4d37a285b. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZK6N2591121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77d8d8ae30676c8a349f2fea9e96d631d3751b90e5ad029317af69af851e5211. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZK6N2591122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b7505d2169b7e07d4b355ff132c658bb4850bcbebc0bcc8d81b4ce81756247. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZDA42532543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6603c8cfb478bca96b129b007026edd9ac9e8b538389ef8dcd8db7bbc0bbbb6a. 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/QZK6N2591123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6634ba452d6e48d987d6f27a91510b392b005b7d17a3e51879b21292a44f174a. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZK6N2591124.