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 0xa0c989191ae74d056f9aab83366e1b6efc6e58722835c6b1d581510b1ef2c7b3. 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/3abafdaa-10a6-440c-acd6-53cf260351bc.json and https://artists.proofprofile.net/proofs/artist/3abafdaa-10a6-440c-acd6-53cf260351bc.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 0x6dbc560fcd476ebcb0135e14098f3fce335fe5c04148199d4cc39aebe95fb4a6. 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/QZNWQ2031816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78920b06c416b531961903ad6a6338b91e20e4e4bb0002de9509e7bd4b997e7. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/INE182120674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc88891a6c90633c055516abc96a3b84a7535a41289ffc7151e43ad0a4df6ac. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/INE182121087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8108edacb8298bc8de884537dfeaeff2e42b304971e6769927000d52dda406. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/INE182121408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9489094a86e2f01948a65e330ce6d5926bbe08a9a585156b8993cca03202af7. 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/INE182214466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0afd0e5cb6e6d1e37d94b9c9d5a8381c54ec7bb00c280809f6bf346497e175f. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/INE182217203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb6f839c2b5e266f9069d15e765198a83564b91a976c05b1e761df6bcaff617. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/INE182217645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24b3241fe3c0bc81c5b3e46006af1000681b867739bb499e91ad12e920d121e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/INE182223695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x210f84465e0ea0d4be36ca7247164f968d1fb83e1026e29050bf9acb202f1e40. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/INE182302184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc04b084ba90909e84a3b1f85e96b7ae2429d04a28313be15553d350ec1611c49. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/INE182303599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce4a4dcfa228702fa5f869c78932c14810abf92d6eca99fae16791a41a7b5ff. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/INE182304059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb44139edbb33c3cdd2a8a837459a5b2df693f05aa6630f869cb40f11335139f2. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/INE182328614.