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 0x9e8633a7efe425f629fea920746e37647bcf3be02566f7e68e3d9f224f832806. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dfc24fd0-99b2-4030-a34d-56b219d71c97.json and https://artists.proofprofile.net/proofs/artist/dfc24fd0-99b2-4030-a34d-56b219d71c97.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Handl-Gallus: Lamentationes Jeremiae Prophetae
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 0xd64e4147f9e9fa53eb3637961ee633fc39e9743155ab17d3026577edec0add22. 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/CZA160505631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a139312ee80700814c677d9ba57d1ac79a4c7d235605488bb1ff79decf1b96. 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/CZA160505632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x064fa2ca910e4d59675c14d3ea2642a601e77b0c75e92c7c9fc6e40a81aefcdd. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CZA160505633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d68be50fdb5cbb6282132a90e111aeb184bdcacada21c3598205bd6caa2067c. 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/CZA160505634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd83fd2aa0091aa6fccb087a475d1b59655e38a942d50b827b267163d6808142. 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/CZA160505635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2a1c3808a4db2ae5bcc2fd0b11ea2cba5312dc0d3a95ad371be9ca4e1c5ed6. 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/CZA160505636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e92c3387892ca1460781389704f10911cce43ae0f9ed618ca893c4c164c804. 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/CZA160505637.
Caldara: Dies irae - Mozart: Missa brevis
Lasso, Caldara, Mozart: Masses of 3 Eras
Jeremiáš: láska, písňový cyklus - blatný: štědrý den, kantáta