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 0x26e9e742927dc7e2eaab7ba35277a4bb7f214ab88386602209422c13ac690a21. 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/8a413a7d-7427-41d6-a328-44fccb567898.json and https://artists.proofprofile.net/proofs/artist/8a413a7d-7427-41d6-a328-44fccb567898.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 0xa25590d29e5732a5ba13a3df09c1272661a407b2b29306e826f502604ff68232. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:34:00Z), 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/QZFYZ2454061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d14d23dd1db1968c91ad8b7b8b594a51b93ecb6b52b5e027ed5e95f7376abfa. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:09:15Z), 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/QZFZ62423461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cba0d41633428e7c5bc0124e8ce4f5b66a3cd2e8e965a28471fbfdbb3e019a7. 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/QZFZ72404561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4471fbf9b672790522a262661e6b1324b27a4e88a5144f49bd0e227de220872c. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZK6K2445687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf54fc4287fb4377770dd1a6ef333b81a82afcac16222f1e71887188235d5a90. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZFZ62495177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a814ffd4ac8cea5545f018259726015318271b4b1375edfa3b7629ab6d8061c. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:28:51Z), 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/QZWFL2373616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc748438c454a30c654933ade7ae92082814028f2597ed95a1ba192375e5a0e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZHNA2446317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371877d00fb6c92248f7a13f6fa690dbf3da063da6ed0655d81c2c2d4a5bd764. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/QZK6K2445690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceeeb3728d620b41bafa4e9d437c66ddeb1d1ef95b0a69518815252259a065a4. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:00:39Z), 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/QZK6K2445692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd01ec3cd281bc7a633f46904e9b3ad4231486ef1702653d805c1abe6a5cff91. 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/QZWFR2470132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8da6099962ad0e7b26bc435c33048f2d7781e5da3691dfcaa49adaad5562f5e. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZWFR2470133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x465dade0c05c96f42234e09aba509a740f793f087210683ee3156df1e3e93e22. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:07:42Z), 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/QZWFR2470134.