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 0xed66a6a7d4fec273892da927d79d0e54a666f19fc885b51447b5c76847f8c2d3. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d7585fd0-5efd-4138-954d-ca84fb306683.json and https://artists.proofprofile.net/proofs/artist/d7585fd0-5efd-4138-954d-ca84fb306683.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 0x4087616d3dee53277bc9641907fab860172fc709a630c966bece1423949431fa. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNWQ2480548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6beec6c65546c92e0f85d8c68944b4c85238d1c74e7cf34664a4d86d9efa895e. 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/QZZ7R2409576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93fb43e14050f72bd72dd24147b3ed248e1f1c9a6bace2f3514715602cefb596. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZNWT2545818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ef74489d668459fdc00c5524143957b4c1a3d3542fccdd8784be51f58c2608. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:06:58Z), 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/QZNWT2545819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c53d07d790e5fc257758dd955926ec763ee660d87d2b9e95bb34c36109f910f. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZFZ42539958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6f01dda100e1e5896f984cadaa3a50da1902c975bdcbb8e2136a7daa185a74. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/QZNWT2545820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06e93cbe52312cdd10eca7eb24a9bbd3260e08fa17481337553ce99ee1135b6. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNWT2545821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a7913704b7b9c98223b78d0e9c2cf101499d8e9fe3eab73cc9220d9918b289. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T09:20:14Z), 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/QZHN72593400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae1a47794ea8b734c2850f599e1422855e79f77c35dca527a9eb1bdb755b52e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QT3F42519345.