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 0x6bf394740fa1d96d67001738da5a68f0a56b882aaf4d2e8f9604f4140d137120. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f00db90b-fe9b-4841-9bff-aba509d3def6.json and https://artists.proofprofile.net/proofs/artist/f00db90b-fe9b-4841-9bff-aba509d3def6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Lamentation: Quis dabit capiti meo aquan?
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 0x2ae744274be1ee97ff6bfb1a90d5c304329060e6de88fac61adf516c22621d7b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM4TX1777237.
L'Orfeo, Ato primo: II. Lasciate i monti
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfcb9659497ed99edcde77434f7bb47e8521bf69ee7ccd5c5ad8387e8c0865d2. 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/QM4TW1565525.
L'Orfeo, Ato primo: V. Ritornello - Alcun non sia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5d672192628d523cc557c005ae8548d3fcef6e0cea34fbeb1aa94f9b760bd8. 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/QM4TW1565528.
L'Orfeo, Atto secondo: III. Ahi, caso acerbo!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47011f37ac97fc5829a6954f8baddf19a029f9fe4df06955c6b246fa6818c95e. 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/QM4TW1565531.
L'Orfeo, Atto quarto: I. Signor, quel infelice
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7596d63434b622209dcdc52230b3d1f71959cd6383713397ac4a63d4cd83eedd. 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/QM4TW1565545.
L'Orfeo, Atto quarto: III. O dolcissimi lumi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb098e73cf302de6c928fa6dad37241c8de927ca416ae3900ae7e6dc602f258. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QM4TW1565547.