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 0x33b173ec24ab97f608c4d35c3c327a4f853b4a0f21c8f2aa87f78bca21228c0f. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b8cc5b8e-bbab-4480-aa36-9a603508b67b.json and https://artists.proofprofile.net/proofs/artist/b8cc5b8e-bbab-4480-aa36-9a603508b67b.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 0xd862dd4121f423008c293c2fa4a94443752fced9fdc8ea0e885f78d0d4c12b56. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USL4Q2187693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8fc0e7d0690c48f28a91ee624aada824136dd9edd6feca0f6c4c511a4347cf7. 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/QZHN82545189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa313e60dd3fb2c8aacbbf2f6d95fa928cbaeef83d91ffd1bd461a59e696b8d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZHN82545190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1e75933e987c747d1803431edd97e4328496654d3433a0993a6b829ea279ba. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:16:56Z), 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/QZHN82545191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b28a6ac50b65fd2e2833b79bb21b35d4fc25ef9385b607b30477f5ee87f93e7. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:45:52Z), 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/QZHN82545193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed16cac0d24086bcf4105561e31c6234081b47ac5ee62b2338d76c44cf35b05. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZHN82545194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba4a5b2e808219acffc6d31665e1d4d70ab37493c8aacc271997fd4e6883127. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZHN82545196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37756998776acd6fc214cfc741cef73ef224f575d06dac08f2df3bced300cdde. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/QZHN82545197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ba05cfd51d4f3a6e3e3d202df1244db02bd408602c752629b78f468fa5f96b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZHN82545198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x713f5e1e763016d8034c57e1df8e1c2416aca4bdc510c9847cfaeda380489a19. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZHN82545200.