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 0x0594c49ab29298b5e956c6e870e628ce0a7a012a12e37b61d9f17c5559e0db7e. 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/3236eb24-d33d-4ec5-9c99-39dd063bf73a.json and https://artists.proofprofile.net/proofs/artist/3236eb24-d33d-4ec5-9c99-39dd063bf73a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Saint-Saëns: Cello Concerto No.1; Cello Sonata No.1; Suite, Op. 16; Le Cygne From Le Carnival Des Animaux; Allegro Apassionato, Op. 43; Romance In F Major, Op. 36
Cello Concerto No. 1 in A Minor, Op. 33: I. Allegro non troppo
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 0xcd78156a6b3f2e4554e771d1c06b8f720af2b626e9fa6ee20e59a4d3c7bb6e6d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEF059704361.
Cello Concerto No. 1 in A Minor, Op. 33: II. Allegretto con moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc8ef6a3496b6c2fe20570cec71d8edf136d380f385887d5218413d99817b4c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEF059704362.
Cello Concerto No. 1 in A Minor, Op. 33: Tempo primo (H)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd32bbdbf8b34304e549fdce2d4935b7cdf7f07ce1589d92a8393145e3218b45. 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/DEF059704363.
Le carnaval des animaux, R. 125: Le cygne
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b4103747d4cfd20be5a2691d072025e5f18b66a4e15fe88dfb92003b042fee. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEF059704370.
Allegro appassionato for Cello and Orchestra, Op. 43
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a30ef4df50d7533243f308184b22b6538962ceac04d5045c397632b44020568. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEF059704380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf86e49f7c847e2c88afb132ce0c498b681132116fccbbe52c87be98dfcf05d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEF059704390.
Suite For Cello And Orchestra, Op. 16: I. Prélude (moderato assai)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc08a059c872c653ccc1daed305c8ad9e04a50869b342adde8f4736fd98bf2be0. 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/DEF059704401.
Suite for Cello and Orchestra, Op. 16: II. Sérénade (andantino)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266d859622111aa451aa2d780cb574044b6151a8b22adcba3320fa3c78a3d832. 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/DEF059704402.
Suite for Cello and Orchestra, Op. 16: III. Gavotte (allegro non troppo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc7b67f69513380067cea314690fb7e0e78e0e83fa3f263d21fe2c987191e9fe. 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/DEF059704403.
Suite for Cello and Orchestra, Op. 16: IV. Romance (molto adagio)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405fbd6b81e7fde1dca3de7ead4b17ad4c151a4b95071617a376223760324728. 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/DEF059704404.
Suite for Cello and Orchestra, Op. 16: V. Tarantelle (presto non troppo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772a61225e9278715a7084a529b00af85b740e55d9f01d01da1d9cbca9184e64. 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/DEF059704405.
Sonata for Violoncello and Piano No. 1 in C Minor, Op. 32: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a32383b5c10fbe88bf630cd7c93287d1974cca6c26e3040f4b95a08c27d5fb. 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/DEF059802151.
Sonata for Violoncello and Piano No. 1 in C Minor, Op. 32: II. Andante tranquillo sostenuto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3269007cf2c7b4765e486816b57c5ff938da36b73498335be53bea59eac7b9. 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/DEF059802152.
Sonata for Violoncello and Piano No. 1 in C Minor, Op. 32: III. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50636cc1226056249012c48df21a5eb57a7b92e4ffe1e1288614d51012878731. 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/DEF059802153.
Schwanengesang, D. 957: Ständchen - Performed on Cello & Piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x147cec5f9ad9e8f99c48034e5358fdf9b2fee5495f884a8d4252d9fbb1f254d2. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEF059602120.
Mischa Maisky - Fauré, Mendelssohn, Saint Saëns
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56bc38db35205ab428d2f70e9b442cc386e3da7cb6659fac914b9b35abc81f24. 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/DEF059902860.