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 0xe6e2bedf5999bd91d0c8bc21cc6f109bb91cb88d10a17af411d83b43f7a352c1. 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/f7108c36-776a-48f0-8f5e-991f0fa76616.json and https://artists.proofprofile.net/proofs/artist/f7108c36-776a-48f0-8f5e-991f0fa76616.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 0x8e6a5e03601388ae6beb4a95ba35b3404f1c3121cb64efffeaab0b39f19cb3e8. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:23:23Z), 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/TCABZ1464126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7116f63f15c36c0fd7d22237d516196499f0dc715117ca1711e370454eba6096. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:16:01Z), 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/TCABZ1464130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11558655fc24f7baaf236583342b1fa9d0cb2285d6e754459f911d1e645d51a2. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCABZ1464244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da86820fbf2788119936a4383d4f0b45181509f072c164265faefce6e1852e0. 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/TCABZ1464245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5810f47b0863cc99270efd76f6f640d813bc445bc4f9149441780728b598ad7. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/TCABZ1464247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda89254472b0073b28651b47b21911f78ef5b290f6d311b6bed4ce930d9926d2. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/TCABZ1464274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5c6c9559cca4191c22084328fe8b5e850b46427cc863107b2d2eaac1afb094. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TCADH1734168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d18ef1fa50695a3a1109c10b69d53eba0dac29ae9fbb1f292bd8c9f09ac808. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCADH1734169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b9b8cd7c4b76ab1536df754ca635e81864f94cdb0ce57625da80cb9c6a51f5. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCADH1734172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab3552e61bc112e209b1bee7a027253c450627a7bdf6db22a3f447a71a17b03. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/TCADH1734177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9148740d4b2d545a99c511abdc022570430a38346e83a8a20c98e69c310703fb. Chain 2 (Bitcoin): anchored in block 957697 (2026-07-12T11:22:18Z), 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/TCADH1734179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114ab25c801fef1f059ccbaf8ffe9f53795842338cd18d0bbdf4d481f4302c77. 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/TCADH1734184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a3195fd160c8f20e9c07c943307b929131b505dc5a79150f5be4f12d9871ba. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/TCADH1734188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6744228ed066ba562478b033430bc8a91aa0db40d34ab7e0b8c3191547dd16d0. 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/TCADH1734191.