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 0xfd76582a3aadfefa28fd7cf8d87e9f7ce0467c6b9318f8d8adb9ceb23752e161. Chain 2 (Bitcoin): anchored in block 953719 (2026-06-15T01:07:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8a332c92-e819-4f68-955d-3c91f3ada352.json and https://artists.proofprofile.net/proofs/artist/8a332c92-e819-4f68-955d-3c91f3ada352.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 0x34ff5672382788838bb0e99c730b5764547c89503de9f16b5758fe4dc97c048d. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:14:32Z), 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/CBCZC2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6d260a857f1e6a4dfc82f7960880bb7e744f8c6c16a3437484f1176e8389ab. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZWFM2490669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8fe091352ab4d163a38e4cf776f78ac4a9b5aff2ffb57c720e9c0da48d608e. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZWFS2426858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d41bb2699ecc667e6b53bd643bf9e407372d6c4001bd21055578287198a4ea. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:40:46Z), 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/QZZ7U2425359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65fdd6c7eea70ddec9bd36b15b2d2a100da30a25e3bf6d4a6431299fd9c9f71c. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/FRX282519535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd66a034a7a05c11d37e857d8e07fbec6d1121f696df0214c4d646dc1c6e3f317. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/FRX282567762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b72ead4bd890878c81ca58ea38aa98b73988ef98a5040dd0a569e19201ce9b. 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/FRX872555133.