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 0x6bee87f2f7dcc31721a70ca3f399713c0398aa8df0c254d100b2e6c190a34d15. 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/764a9c89-2940-4f5e-b5ed-d989331570d0.json and https://artists.proofprofile.net/proofs/artist/764a9c89-2940-4f5e-b5ed-d989331570d0.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 0xd72990e4b2872916579fdb4b219c19e21910a0180010fa5613f951fb4fc4e572. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/ITBGD1700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aad66dd8500edca49bbbd3735a9598d8c07e4c3c80642303e37478c835f066c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/US7NS1800020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b59a84dbec8d53bf53072ff23d83304e5a42c7a568ac0ae62a9a1395ab49e5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/IEHDF1900150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77d092be4993116f706efe45fe2b92f76b4a71a6e8b8ee92774847e9af124fd8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US7NS2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d13afbe359a66186924aa8e06992403b52a2fafefddce857154b6ee0699c54. 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/GBKQU2542507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f820404979d16605ec87f03a65bd9de3cc6c5ace4f3271c1921cf2006806432. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:36:41Z), 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/GBKQU2542508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x626d2d4b6d51b8fe6fee0a93e0f01fb016efea60b6ff1575016a6bb3a1134cac. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US7NS2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec1e8b6da78c746ed120e43e83676c73155801eef496c1d753d8a3c6ab8fd873. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US7NS2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f12505ba52923200af5eb759067343313177e1601321630a34d72de885565f7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/US7NS2400013.