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 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 0xcd090e46bb177b93ecc6ef376ca2a689f8d83865b3a5aa3a1a3d8fd10b07b4ab. 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/0ac9accd-ae77-474b-9564-d69f8dd43d22.json and https://artists.proofprofile.net/proofs/artist/0ac9accd-ae77-474b-9564-d69f8dd43d22.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 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 0x45eae8c57041fb1cf4864a8c7e49bc557e437c4881f1851e2f17a756a8da5639. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZPLR2204559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d1324e875d3fb8fd66e01eb7b06060fdd74e34b1c175ec67fe36a88efd6aa2. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZES62321860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6867088ce3ba9e3522b7405f96fcfdb60e7d9af9fde480f336735a283c5fe513. 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/SE6TI2363721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b9e45dca847d780ab4623a09ae1706fc704a74b9a4081b4bfbd55568e209f8. 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/SE6XW2316235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ea6fc04f1e296b3000e82f9f2346595e00e5f9385ede4bd74d3017e56e2501. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/SE6TI2345714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x686d3b4afd437077417834f5910f59965a014cba6957dabaaeab75922015066b. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/SE6XY2383323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6c413367dee12787fdccffbadc12edbe944fd04f48cd786cccd6baabeb5b11. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/SE6I32494475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1814c563ba7b1543a7f3894855929850594b45e18f1d8ed54306586ec0aff180. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE5XG2405612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc183fecb4e4879b19c70b0e4bf6f77aaf76a68885afb9e3417fe40c6d2059042. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/SE5XG2432225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9c6bf04425f6c03b4254c9d4f50063b827bf7793f27e4bac1e30a0dabc201c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SE5XG2501624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90d07e20251a13ce66af6e5aa72d904cb76a9d9e9c8d95602f954728f891ed1. 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/SE5XG2433498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5725725eec66fbd72e0246233a818ed09bb153d0bd03f1a11bb2dcce55edd729. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SE5XG2426248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cfb926a379dbc4f512cd880507b820375f431b5c17255d4a65ba514c3046572. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SE5XG2426249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc9a065b3762b5287bb2f4e8db9c762e88f38e4f889d30cc61b987f35f50e44. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SE5XG2451548.