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 0x9f3fe261403da008604b5efa0f5ce3fdbd6ae833b4ac1db50d0b7b815374239f. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cf39e4ad-1e87-45a5-9cd2-6f98941e329c.json and https://artists.proofprofile.net/proofs/artist/cf39e4ad-1e87-45a5-9cd2-6f98941e329c.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 0x2c8309d1c3cf90a82834a7d30071aad789fb225d27d7397215ae4dd98b636182. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-20T00:23:51Z), 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/DEZN82369451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe743f9a41334a1939c9f65cbdb5941b7bcdc2431bd53a96ea5360170ce7c1021. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/DEZN82369453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33a329a28a39173c82a26061f8bb7ef6a7ebdf1d658bdd12ee7be003ddab9ff. 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/DEZN82369970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4992f2554a499db92c289f5f413b856a29828850ea0cba9eb7f0cd1fca01da7. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:04:29Z), 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/DEZN82369971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac3fa6590805786d941d40ef7362b48061a01d8d9046f2b182ec5868624fd74. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:21:32Z), 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/QZAKB2458840.