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 0xa0fc58d0685a258f7c84588892c4dc2f71b2a6c3088a3038f39131d4e7baa9f4. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f495e7fd-25b9-4a6f-aef4-d921ca0c3846.json and https://artists.proofprofile.net/proofs/artist/f495e7fd-25b9-4a6f-aef4-d921ca0c3846.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 0x465113b0efce58055d1f86533b1d54e9eb232e3519e3e41d017b058a1ada0790. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/ITZ681900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ccb2cf04d482585e499b509f7d32bc096d12ce7fd5411c1632ff960257cc24. Chain 2 (Bitcoin): anchored in block 957653 (2026-07-12T04:35:02Z), 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/ITZ681900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a54444eac79d2d605455d822e685ecddf18c112f14181223cdc692449e7d34. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:07:59Z), 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/ITZ681900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6284c102841db76bf78f55af54fdbfa27db866e9a07621a1512bf6baf0af9ea5. 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/ITZ681900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5fe725050a4cd275da1979d590883940ae1c298c28c9ca50c40793f9d86baf. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ITZ681900014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea35c85c62dc54d8e0db49282211dd2792f51fe030a176ce4ef08d0bb788846. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ITZ681900015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3beb0ecbe042a45b8a23f878e6dd8ad564fcf2a0d35b2dd0da15915e447d673c. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:14:20Z), 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/ITZ681900016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf41e98e2485fc2e540784d62c9b5f0427c7fb9c21b8ac92c51a999852b6c54. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ITZ682469042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0aadfc9c2ddbf78f9954c4e9efd8b7e248ab3580bf5145a8b94059eb73f94af. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ITZ682469082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a86460787919822bc45cf8c89870d5b0c1b56856d1cc231e81b4036f3f980d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ITZ682469090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc72408faa3ab2e7cc0801a36ab23cd58334906d2d6036f99e73b29be78f4218. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ITZ682469092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadea4b6aa4234790c48edb3005db0d30f73728cee660a24749f622e687eb14c0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ITZ681000096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c117051f78d4079878c81ae42771eb749dcabe056ae4e6e9e2183fb4f778ec. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-22T05:35:07Z), 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/ITZ681000097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc764d3eba8da7a375746c4793089f9b318791c03a7a30ca51e2e03b94b78f0cd. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ITZ681000099.