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 0x5677f9150bdc8189b928be2a510a9044df322de59d5f008874f5b9619b24054a. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a56c3ce6-7e0f-411e-828a-8f966ec3d1bd.json and https://artists.proofprofile.net/proofs/artist/a56c3ce6-7e0f-411e-828a-8f966ec3d1bd.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 0x0529e5e5fa50e577f43880f09211b729f330c1e83ba8722ec63fd046006f6ff4. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/SE5Q51808456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc24089f3963f0e46413ed0226f2bc4551bbedcba81c3c1638b73aaeaaecd405d. 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/SE5Q51818762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb9a95ea2e88430fdfa82c06c53bdb76487a0360c401900c617451ee40fd87f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/SE5Q51827135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb7db0335d32d3114e49a76dc3f6bc9ce4458ac9644f9b50354fb510a79567f. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/SE5Q51822780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45eb0be832325f1c7cadff1f9a4c374e9bc913220b4e95db6874a6e66e3960d7. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:04:41Z), 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/SE5Q51827413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc606dfd24c9da35ba3333bf779cf7a8ffdf9d423f897082fb51dcf90ab563389. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/SE5Q51822677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be41b0b1fa85223736a0d9d5071640ad2f766fcf638daf53c945a5f77f32e63. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T04:00:27Z), 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/SE5Q51824830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4092e8cd360668c9829b662f066c74c659cd448b1078201af7347e93a236e44b. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/SE5Q51813694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb92ef66c40ce6338dce824204dab6a7222f38764d4017c10304cdab4e31ef10a. 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/SE5Q51814319.