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 0xbef197047b41e5843bb54e30e18bbc8b8144287f4cac8a7619ce6f9065a9ae51. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/67e146fa-9bd7-4e02-a608-5b1971bdc58a.json and https://artists.proofprofile.net/proofs/artist/67e146fa-9bd7-4e02-a608-5b1971bdc58a.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 0x9566b1b3f6c457465520cc6fe0fb7c8fb136a39d132d51a20e36d03962185c09. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:01:02Z), 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/DEZC62260553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d00ba35b3724fa0fc905ef1d225544b89de3fa245981afef0480fbfda9da8ba. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DEZC62275561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348b8765370f167889903bd09436bd6a2074799d9ca01003372a84f5d1bafdf6. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/SE6QE2416783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb85b9e1e3fd0118efb156c6f123a6714f75b273e3a7f8304e1c70edc3f80ec9. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/SE5BU2520915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60bad4e7a05ec6964e2a17ede022a17c34bfe8140f8a78c2910cb1e364cc2c92. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/SE6XY2508339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5462910fbaa2447b96fd9fd8ea5e7bf400ac2744abf02959543403b9bae4681. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/DEZC62599789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ee6c41bd10558a3b79b5c6c5bc5bd5dc539809bf0af467bc9fec9e1a3b2b88. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/DEZC62513418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd9785e4e442617c8eeef0da89c4e4313161d14b460a95cdd9721911b19e32a. 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/DEZC62519613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad658e6f0c98025efdf1529d0cd3543c5845e65c910f54b117274c0719d2fcd. 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/DEZC62533052.