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 0x45f34dba789bc53e36ecbe64670951ab86d0b4d29c7844084249aa2db9140f0a. 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/83ba7f32-0c40-418a-9e9a-f0f501f75cbd.json and https://artists.proofprofile.net/proofs/artist/83ba7f32-0c40-418a-9e9a-f0f501f75cbd.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 0x2d3099095890bd668f7a3961b2fcdb2aa1882551d71fdd9ae5a94e9b3f18d45b. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/RUAGT2451996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbf0122b918d9e1ede99f7e4792291f1c1615f91be4282d92568a1367ee62f23. 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/RUAGT2451997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff9bdbe86bc194bbba9481f34ba8ea27c27965a93b9b24e471e3948acfe2f6b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/RUAGT2480048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85475e8598fbc8f2cfb96524eecdda075e36596991aede607fa5f613fb85f746. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/RUA1D2562481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7415a230210646e3d97eff72058cdcf24fbd0df8efa5cec7bf3347799b6c112f. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/RUA1D2562483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96855bd56fe0b708119099b344a209fc306eacb564e64a0d740bfc3d8cea3ccc. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:08:07Z), 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/RUA1D2590654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46aa17d55f365cf85cf7514e997df2c3ffc410068a56570a587ed3e3ec06c2a. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:53:15Z), 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/RUA1D2590655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72fe92eadc83d26d1f7ceebda3e28c148ba332123545a42a935e9438c913f6bd. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/RUAGT2578050.