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 0x82e04cf284a8484e1d467eac703ac5c581f0ecf33b3de794540d2fc310c58b22. 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/38baa25f-691b-4ba1-8296-ec30de0228ea.json and https://artists.proofprofile.net/proofs/artist/38baa25f-691b-4ba1-8296-ec30de0228ea.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
No man has ever landed on the moon (Extended Mix)
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 0xcfca397c19c519c7f39c52d654d55df78e9ee80b6b558bd8b7d76a0e29d43142. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/USLZJ1756386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694a590dc42a7ebea0ca7590ac0cebdf9916036904337cf708f615650b3a6fc9. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/GBWUL1806188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e6bfbcb5c268e0fdeb030c7599840a4dbe67cf330bf7fdbd4566d5f7e14834. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FR9W11931780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05f798d4f716e6a162c7711279354942079f6e3c027e1b7a3a03046dc42b06c. 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/FRD4U2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32598b44c0fa26e0e6c33fda4e99790deb181c3e554217db578c23b12c880bf1. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/FRD4U2400220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e246aabc6656bc126de309f3af5ce07f57ad59295b3cac22555ce55bb03990f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRD4U2400210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04ccbc84bd5ce365f66fec88fa5578746e9e8973655c66611b5211a287e2642. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/FRD4U2400150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d51977419be8199c89ee75a2f5a0c978241f88a3908c034f237dc8e8af24cda. 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/FRD4U2500030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e7f6a3a9f3cc09ca5b455db2b81b6eac3457339ff132b4a99e4323e70f5da8. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/FRD4U2500080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd2d7ad34656a3a276bfa1e0d9b24843f266b952e231bea7bdc690e438403450. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/FRD4U2500090.