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 0x6340704b62de17eaab672dd4900f712883a94df9b0cc2647c140a8b0d489f2f9. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fe4a5925-8675-4479-94dd-4814e0627ed2.json and https://artists.proofprofile.net/proofs/artist/fe4a5925-8675-4479-94dd-4814e0627ed2.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 0x8169f9a8ae98e737329c6199cf0f9ce79e825e83e79453104275e9fb50cfc37a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEG840300801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d64199aac00e8d31bc46a22ebdba1ae09af22820e7f6b7aab5f7c36c2b467c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEN060401891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338207720682152b7c5f770c4d58c35c0959dbc20538da703cb1010ef7efb008. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/DEG840500461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5c2098ca456acbb50068d27bfc6438da860b5564a127a924af38575b5ce6fb. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:22:50Z), 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/DEG840600520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc68a044b12bc35f70846bfe0d820c09352f26f56a4ed2576781b9a429c3529a4. Chain 2 (Bitcoin): anchored in block 958143 (2026-07-15T10:15:04Z), 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/DEG840700783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338207720682152b7c5f770c4d58c35c0959dbc20538da703cb1010ef7efb008. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/DEG840500461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93984e0ed29dda24fd3a13f521bb58d7d0259f20569359f246b97b13ef8123cc. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:47:12Z), 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/DEG840600523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0073c5887fb29e2f822dd6d55d08675a21250cd4ba0549ba34fa780ff4a84654. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:50:37Z), 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/DEY202000137.