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 0xa848fc3934fd46a010f72b8be4697f59c4a5f94c026074a8840a05f65077db91. Chain 2 (Bitcoin): anchored in block 953636 (2026-06-14T13:03:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3666da15-7694-420a-bacc-66bc5936b5a0.json and https://artists.proofprofile.net/proofs/artist/3666da15-7694-420a-bacc-66bc5936b5a0.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 0x5fa3bb464fa13b2bbfa73a2900eb9967d96f590cb87969773c555cfd60d13109. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T18:02:02Z), 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/QZES62309318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8415add05c6dbab5764760bcd904ad92aaa027eb809fb4487bedf5b5b685be22. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:05:09Z), 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/QZK6L2380685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37133ceb636e7ff3253cfe17b3291ca43809e9a02a5c323599fb98e3756e35d1. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZTBE2339051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a71d83fed42a6fb8c8332878abc2f3c1d8f76fc9e19a30f68aeedd0928e04cd. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:56:58Z), 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/QZTBE2339053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd2e5b783137a221b2d44123c7213d86e51d3be5b2534c1aa60af2346a23a689. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZK6M2472255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7437118d411486e851f4e10fc93adffd44994709c6246c70885de5dc74441ee. 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/QZTB82553833.