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 0x3e957e1ec65cb3af7efa3d871170b1a769283b1d43c564af079a50ab41acf34b. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bb87b94e-6707-412e-96b4-0ec98b30187a.json and https://artists.proofprofile.net/proofs/artist/bb87b94e-6707-412e-96b4-0ec98b30187a.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 0xe8cf3c7ca271316f211929998aa8cf9e6e23fc1fe699b3da7aaf026bdacb3c6b. 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/QZMHN2235520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb298c67bab6d6bde5a255354b5b87d9ae19fe20930e8d611f179cb6bb40f90c2. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZES52486925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb49ce8034f92267a0a0a76eaed6658666b4e3fd77ee0817923024c45119ff5f4. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:39:42Z), 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/QZHN72421802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e2b90cbada13df92349aba32a35e93d9dc3ab60e92d3bbb3fc3697f5d795b5. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:37:31Z), 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/QZHN62452969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c05daf02e4f22c5215097f5fe864f7abfadb4685597d7236727b8ad651970a. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZWFF2403186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b92e08cb9432a938e774c0a3ec7ef6da38f23eb8553dc5b294be33894332dc. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZWFM2471842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd282a0050aaae0e4bb55ef9ad816f264ccbbf2e352df6d2e622726885562395a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZZ7M2452579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552e6acbb3a8df38febb6f74b4e56b1e0478d33ba792366e8a86d1d680d3ce17. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZDA82531921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae2c1dd0e409c267f6cb5ce07ecedbd0dc43f99e13b7f486db4d02cc17ede12. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:01:50Z), 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/QZTB82573771.