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 0xf336d1f1d71069fe2710de4c8b4838b380871106f67eabd788531afa971f4a01. Chain 2 (Bitcoin): anchored in block 954580 (2026-06-20T17:48:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b6c7c58a-2821-4d17-8d48-c7506acec549.json and https://artists.proofprofile.net/proofs/artist/b6c7c58a-2821-4d17-8d48-c7506acec549.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 0xe0fde33ae02161d341301242d6f85f5dddf9b11ae824ae48b333fc93dc9518c5. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T03:54:49Z), 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/PT3JF2500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec046683ec9110fb83ed0854ce4d9f529c02eced0d95f75ac8413059e264c78. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/PT3JF2500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0fde33ae02161d341301242d6f85f5dddf9b11ae824ae48b333fc93dc9518c5. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/PT3JF2500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebeadba3e7cb9063c45082adb09daca7541e37024096ef79d087fae071d24be6. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:24:26Z), 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/PT3JF2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83e5d0bca0f2c31ff8e43cb12dbd0243ebe01ae8d1b6ad261abb33087aca44c. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/PT3JF2500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e60c05b69a1563ce0dfd1b7060ed1dbe732dcad28febb3c02de36a5aee4524. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/PT3JF2500014.