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 0x5043f5c545a913de4b74def41e3e4306caf269e1813cf50e7cf2be94fc485f5f. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8d7e4d19-31dc-419b-ad1a-edbdfb1936b4.json and https://artists.proofprofile.net/proofs/artist/8d7e4d19-31dc-419b-ad1a-edbdfb1936b4.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 0x9cfe0425671a23e47d3dd51eb35fa4e537125fe05c4470125af365dceca7941c. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QM6MZ1891719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91db324b601ea91a4c43da1f1a85aa97e480a2371c7db5753a47d9d755d2e7a1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM6MZ1891720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3553dcb512721671e4a09232f03e510621b3956fd157b029b624f8dc7308b1. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/QM6MZ1891722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f603234f5a82a826a86bfd3b8fc9fc43f2513aab8ec193944cbfdf5fdc42b2a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM6MZ1891718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf74093432fa2cb8f0d742894c2bfa71858768ef52979b8633bb5ba6a1406235e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM6MZ1891714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0583861bbf7cdcc89787c9e2f1d138b7ce30816f1159b55c5c4668071bcaaf00. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QM6MZ1891717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8651e3f006c95b3d2e2cf53596cf496d34e4a713febf962b16e95f54e30aeaa2. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM6MZ1891715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3864a9a97ac97e16186edfe66d766b5375410f5cc8510a14d5e1d99c94dd03. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM6MZ1891721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cedd41008edb4a41b92adb47a4cccbc3883412f800923012a6dceea5dd651eb. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM6MZ1891724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c2efc4ee795fe2b974c7b067959b85a0869fbc8f4129d880008e30946165edc. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QM6MZ1891723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2a2cbd2f8076a8dbc409b2cfd080cc41bf14bd73aaa092a498249442412bfd. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/QM6MZ1891716.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02f026b19353f2d0182855abeaeb11955cc82b6a834d329ea339cdd28d45037. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QMFMG2362156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1626b7765a60c87ae3a2980a1781f492490104cdcbc090dcdef9b4605c5a8e8c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM4TX2402268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801f72a76f55ef8a9a5016dfb7b14909bbaa4e96fd146f52c2f0edce9421f4d0. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QM4TX2402271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x447f5957222ebbc209020f3059fbbb3112cee4fb66b79971979c294f8e8ebed5. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/QM4TX2402296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f2380dc887e03a17a7b44a36ff01121074bec6d1cba29ffb49f487d19cf81c. 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/QM4TX2402299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89be1db98f8bddb81ab9f7186de846b504fa323c0137984a34c51cc9a4445d0. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QM4TX2402301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aade62eb825f22458059a24aed70e44bb64ef34e7447aa75f14f04644e32855. 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/QM4TX2402309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x200e9662c4cc35d651fcc99e34b8bec8c638a96d74898aeed728a00bd87f3ee1. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QM4TX2402270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0e0ec2a148da53add92c7c04e9ecf6627776e5d3891758429f9309684c0949. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QM4TX2402304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x810f92695f2f5cbdb99a92b62ed8c490300a029e72df90edda57757c7401b239. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QM4TX2402307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942adbda78ba8e861b900cb94135a07b2af4b764b5b50b238d74a8e03daa30fd. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QM4TX2402331.