thumb|upright|Rosa Ponzillo, aged 21 (1918) Rosa Ponzillo, known as Rosa Ponselle (January 22, 1897 – May 25, 1981) was an American operatic dramatic soprano. She sang mainly at the New York Metropol
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 0x8b9d705cb702c2781c3452479c4d0f7420d733e2cdd24ff34be99b8cf3a555eb. Chain 2 (Bitcoin): anchored in block 954555 (2026-06-20T12:10:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ae1c50a4-50cb-4cc6-a485-6d9d21bf0f2e.json and https://artists.proofprofile.net/proofs/artist/ae1c50a4-50cb-4cc6-a485-6d9d21bf0f2e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
NKB SP Selection No. 16, Great Singer 3 Caruso with others Ponselle, Chorus
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 0x63aa35d1d58d0d89dfc771486b2b9c057c4abdfd6eff24cb3c5dfb314227f8ca. 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/USB8U2300351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f34f612f87573281d50593e1fd792787438654d2bba802121898ac489452d2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USB8U1519048.
Don Giovanni, K. 527: Act I Scene 1: Notte e giorno faticar (Leporello, Donna Anna, Don Giovanni, Il Commendatore)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57172a463ec05abc8c63b94f581fc77b2dc170c14fad636aebeddbc56fe2fbee. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USB8U1519049.
The Two Brothers - Original Motion Picture Soundtrack "Two Brothers"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9c4c88a5663c3d82a850801f8b84ef4a39656b593ab60e13ef2dd8c2b7de13. 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/USUMC0400032.
Goodnight Story - Original Motion Picture Soundtrack "Two Brothers"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb6ecc6b80b780386a1d9c4758b68b1126e860864ef26d707461dcfcd65ca37. 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/USUMC0400020.
Verdi: Les grands opéras I - La discothèque idéale de Diapason, Vol. 13
Ponselle, Rosa: American Recordings (1939, 1954)
Ponselle, Rosa: American Recordings, Vol. 4 (1923-1929)
PONSELLE, Rosa: American Recordings, Vol. 3 (1923-1929)
Ponselle, Rosa: American Recordings, Vol. 2 (1923-1929)
Ponselle, Rosa: American Recordings, Vol. 1 (1923-1929)
Ponselle, Rosa: Rosa Ponselle Sings Verdi (1918-1928)
Bellini: Norma (Callas, Filippeschi) (1953)
Il mito dell'opera: 24 'O sole mio (Recordings 1907-1984)