Cristina Ortiz (born April 17, 1950, in Bahia) is a Brazilian pianist. Biography Born in Bahia, Brazil, Cristina Ortiz began her studies in her home country before moving to France with Magda Tagliaf
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 0x50da81fe44bee56821dc1749e99b5cd8effff76d311ecd32bf4cca7c1800e0d5. 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/19124245-3b18-44d2-9aae-b3ca7f1e274c.json and https://artists.proofprofile.net/proofs/artist/19124245-3b18-44d2-9aae-b3ca7f1e274c.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Shostakovich: Concerto for Piano, Trumpet and Strings, Piano Concerto No. 2, Cello Concerto No. 1 & Fantastic Dances
Shostakovich: 3 Fantastic Dances, Op. 5: No. 1, Allegretto
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 0x136ddb84207a2a09343c64ebbe96f263ef0cb10bef4360a5b731655728dd8bfb. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYD8700924 — a six-check JSON result.
Shostakovich: Concerto for Piano, Trumpet and String Orchestra No. 1 in C Minor, Op. 35: I. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98249e80e3d163313dd494853cfbd9b9d8c8f5f1e09de815e0e7f54596e75b7a. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYD8700391 — a six-check JSON result.
Shostakovich: Concerto for Piano, Trumpet and String Orchestra No. 1 in C Minor, Op. 35: II. Lento
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x473664f7371415dae97f4b5880eb9e8d5fd14cac81d83c7365cae3fab15c52c3. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYD8700392 — a six-check JSON result.
Shostakovich: Concerto for Piano, Trumpet and String Orchestra No. 1 in C Minor, Op. 35: IV. Allegro con brio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe551bce531da05f53ee47ecc44b59ef6317b687a5e4fb6b24cf59bd8023fed54. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYD8700394 — a six-check JSON result.
Shostakovich: Piano Concerto No. 2 in F Major, Op. 102: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf02b67173a1883d8871b483267e05a033e4320f0a63cd5d429ce156397b97d. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYD8700317 — a six-check JSON result.
Concerto No. 5 in E-Flat Major for Piano and Orchestra, Op. 73, "Emperor": II. Adagio un poco mosso (attacca)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4399ba161c83aad0b2fe1b969b8e40e157d90623b33d5d9bdd13f1d89796e257. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL0558702 — a six-check JSON result.
Piano Concerto No. 2 in F Major, Op. 102: II. Andante
So You Think You Don't Like Classical Music? Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2352598ce397ec310e2c4a85b01d03fe94a3125f29fe731dc2377301e6b3e0ba. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078910342 — a six-check JSON result.
Piano Concerto No. 5 in E-Flat Major, Op. 73 "Emperor": II. Adagio un poco moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4399ba161c83aad0b2fe1b969b8e40e157d90623b33d5d9bdd13f1d89796e257. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL0558702 — a six-check JSON result.
Le carnaval des animaux, R. 125: IV. Tortues
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ffc6f6ac4df0dc6c36c158667844b13809cf6b4b88a9ddc138ad8a1743a95b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078040304 — a six-check JSON result.
Le carnaval des animaux, R. 125: VII. Aquarium
Classic Originals - Pieces In The Original Style 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca515c2e685022066ca71c6e1591a1acea7660fe38f9763b00fd090c417d69d. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078040307 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4399ba161c83aad0b2fe1b969b8e40e157d90623b33d5d9bdd13f1d89796e257. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL0558702 — a six-check JSON result.
Piano Concerto No. 5 in E-Flat Major, Op. 73 "Emperor": III. Rondo (Allegro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4bea8e69d9ce482198959daa33ef9a316f1ebb10c49757a60d19673b55ae63. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL0558703 — a six-check JSON result.
Piano Concerto No. 5 in E-Flat Major, Op. 73 "Emperor": I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21afa596c85bdc7114a5d31d9774f005a98e312f4af4a21d20e678aa3fd883fc. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL0558701 — a six-check JSON result.
New Classics – zum Entspannen und Genießen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2352598ce397ec310e2c4a85b01d03fe94a3125f29fe731dc2377301e6b3e0ba. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078910342 — a six-check JSON result.