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 0xde26d5ec7f4d5a814f28015fe328b5171577659866d1e54794368b22dbca7f34. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4e3b78da-49bf-4aa8-8fa6-e6880b3f1924.json and https://artists.proofprofile.net/proofs/artist/4e3b78da-49bf-4aa8-8fa6-e6880b3f1924.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 0x00358c821181c7389889988a0c3b70e694638137565a77c85a4e90b38904aa86. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:28:24Z), 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/TCJPX2353601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9115291738a5c2adfef03daf191844e477767fcad5e3b13ee8ab136f1a11547. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:36:12Z), 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/TCJPC2419945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4877a0cf1138eb45285474b4fa33efab161ea14fa9754a85d05c7076a37f494. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:50:45Z), 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/TCJPC2433047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc944357ec9c38fedb9df9f3a54a847a4236a405bac7eb24f31eef3a79efdb4b0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCJPC2433074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9115291738a5c2adfef03daf191844e477767fcad5e3b13ee8ab136f1a11547. 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/TCJPC2419945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e127d25dc832a51ebbfb723f3bbeefda32ecd22fa775185a5f78dca9588c8a. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:54:24Z), 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/TCJPC2433150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf23d971777b014416ce96f0d6eaaa12776049270c28f0c2ded2c506c19d35d. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCJPG2588019.