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 0x52566aec3b67eb62d40fe307d9b43324cc81cdc31a415abf25015aca3eafee5a. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aa09b528-d756-41f7-9ca8-0581240f865e.json and https://artists.proofprofile.net/proofs/artist/aa09b528-d756-41f7-9ca8-0581240f865e.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 0x442c108a1b9332ec86b2d68ff1af1168733354400c1b1312291e4af4b3bc354a. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:50:13Z), 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/USL4Q2242470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a113a7ed95632ce110207d1dc288d15b96c73bc19ad9b138ccd940f46811d7. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:03:13Z), 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/USL4Q2242473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fdfa71865b373214497b8e2de981b1d226cd4f260b6964fd771c54fb3b049a7. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/US7VG1923153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7ae25e61561fa09e136a84f4b7a89fdb4acdda54f22461b0a3b0ff914c5705. 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/USL4Q2242481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeced4388430e68cb20fd4a02e05e022f52ee4a373d76248417b5e9e649025549. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/USL4Q2242484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x967fd3c50b8cd28ae8757748453b77b861c3a5036928fe6681e6d29a75a43827. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZ5AB1979084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef43cfb6bf7b6fa69c4076eec78cd703583c8c0962fa931fc70b438888e6dace. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/QZ5AB1979085.