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 0x9e22b0fdd626304bdecff397d9607de9c04bced1e90878c52f8efe7bd72d28e6. Chain 2 (Bitcoin): anchored in block 953730 (2026-06-15T02:47:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/95605836-edbc-4b3e-b2a4-0f02c3e7a879.json and https://artists.proofprofile.net/proofs/artist/95605836-edbc-4b3e-b2a4-0f02c3e7a879.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 0x9b1e1f104bd779c1862944007fedc5367709b1c82fc86b54e4d79ff3ab088e8b. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:33:27Z), 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/USJ3V2029052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8e767375bbc719e8aa388fa89e4c2410093f6c8f3f0edd838123bd2f6e86e7. 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/USJ3V2029053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea623e329bf0a8a3e3b85e9589a95739c58e000cd81e5d3972b01c45e8da833c. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USJ3V2081676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x442a6b43c0bd6c8868e45e62d44f6a2181d04f8fd6da1f839c0e84e93f8c1529. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:43:34Z), 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/QZNWV2403040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe789e5c891ba1037cf508213cdea2a189c2c7513449a21829be282fe9051bdc9. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T19:24:43Z), 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/QZK6N2471642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c3077203300fbc2e81b1ff70105dda6c253e90ad9088953013b5aa7c252f1a. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:37:55Z), 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/QZNWV2403043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb57aeed3f501becb4767914360e0a36feff8bf55585c67deac296659de4e10. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:56:21Z), 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/QZHN72511615.