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 0x25b4dc64213733870497f3885171765517b3c9e29b4f1b9cefe7e4aada3c8986. Chain 2 (Bitcoin): anchored in block 953780 (2026-06-15T12:02:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d40ddf89-6768-4734-a160-61a14218ec7a.json and https://artists.proofprofile.net/proofs/artist/d40ddf89-6768-4734-a160-61a14218ec7a.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 0xe3f9a9484e72c14cf25358e9ec6c7b31e8c6d422cc72a261a87c98739f17688c. 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/QZMEQ2254455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355128ab2f76264f75eb4ef57384e24722cf99ca0b2a7f7783c191199cd8b8ee. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:42:30Z), 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/QZNWV2398676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b29443cdafff008fdfa583131546058bc0a800ff16cc14a0609d7e84011a0e. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZTB22368683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9957e12a14a42cecd9f69420c3bb374f6194cab72b51ea85a5e1e44f6c6d30b. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:25:52Z), 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/QZTB22368684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf44eeb03312297f208501c8b4d2ad1de21bd3392ef97151576ddcd5925d5fda. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:51:33Z), 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/QZTAS2489409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd73130e59bbc7d4f08d3058b071932ff33eeac471ff42a74a33cd182c524d26c. 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/QZZ772452847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be849146f5ac88092ebaabe85e87f1ae1887692d0dd45dceb345d55f80a5422. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZNWS2577216.