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 0xa50ecb9d31a962176293a8843cd21fa766759d2dc0a5bfe8bf67ae790888e687. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ecc44d66-b480-4050-bfa8-7b04cb46435f.json and https://artists.proofprofile.net/proofs/artist/ecc44d66-b480-4050-bfa8-7b04cb46435f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Ouverture-Suite in D Major, TWV 55:D18: I. Ouverture
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 0xb6feeaf031fde65b43c0f8e4c92bbe294f66cdbc1923e2dc6efaaf13596c6cb0. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/CA68Z1700201.
Am Abend aber desselbigen Sabbats, BWV 42: No. 3, Wo zwei und drei versammlet sind (Excerpt Arr. for Chamber Ensemble)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5513ad34d25c26ac4d8660f3d9822b790a55690a4b95f6503f501568e84ee195. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CA68Z1700223.
Concerto for 2 Cellos in G Minor, RV 531: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70400116c853d3b10c091a8e0d260b1fb9ec856e3655c849a0530f2ca4a9f8ea. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/CA68Z1300126.
Chamber Concerto in D Major, RV 93: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2704e504580c1c9a1fc63623cb4c0c32b1fe4bff8100fbf5cb96187cf433652c. 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/CA68Z1300123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f551793faa525e3741f3493721c199efa87e7c343037550d6b99c617e3f0388. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/CA68Z1300138.
Theodora, HWV 68: No. 18, As with Rosy Steps the Morn (Excerpt Arr. for Chamber Ensemble)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c1a0a685d22ba624805ab43c200e35478ee82e48c6dacbd7264a1e1953c2dbd. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/CA68Z1300116.
Wie schön leuchtet der Morgenstern, BWV 1: No. 1, Wie schön leuchtet der Morgenstern (Excerpt Arr. for Chamber Ensemble)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4458d8a5b0ba34ec32110169d6a848fa5c823321d808fa631fcd4fabf8e6f0ef. 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/CA68Z1200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x960bcae0c3f93a84eb6fe0d08dfdca91b0ad95e5463e8e268e8faa5e4d29ef93. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/CA68Z1200013.
Violin Concerto in C Minor, RV 761 "Amato bene": I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8745a67116479797ac5b66520c4cc99d7b3fa1646935dd88c9f5f9c39f29ed. 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/CA68Z1900247.
Violin Concerto in C Minor, RV 761 "Amato bene": II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40603f99375d513c0a8824a7c5181ff5886a77f2a335a178cddebe744647775. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/CA68Z1900248.
Violin Concerto in C Minor, RV 761 "Amato bene": III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe4bdefd2b341727e8a4d17bdf95875f17f95faf35e0374522997904ba9d064. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/CA68Z1900249.
Messiah, HWV 56, Pt. 1 (Excerpts): No. 1, Sinfony
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8950c0df08db7aecc4e94b41d41cc878933c2acca2657c9813a95ffa26cbcbc3. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/CA68Z1200066.
Messiah, HWV 56, Pt. 1 (Excerpts): No. 12, For unto Us a Child Is Born
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf26d2e7a13b1800b9b25898776c03c21c7d48dbd5bad92a5cf11689bdb6fc681. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/CA68Z1200076.
Messiah, HWV 56, Pt. 2 (Excerpts): No. 44, Hallelujah
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a579e2576391cc444467bdcb564e8c0d78dc6f1e69af63a088c647c933bd57a. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/CA68Z1200103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268c8d36f0e75536fd46080ad25b968cd1142cb3087be907e25f774572b15852. 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/CA68Z1400158.
Symphony No. 4 in B-Flat Major, Op. 60: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7e9a19d9d07934b30f20e78abe057f217062f596080bd7302a752cac7a93ab. 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/CA68Z1400155.
Symphony No. 4 in A Major, Op. 90, MWV N 16 "Italian": IV. Saltarello. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1791af0fb9efa832f3b1bb05c4556996bd2881dcbfd8e4c2cd63fcb60ebd6051. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA68Z1200060.
Los Grandes de la Musica Clasica - Antonio Vivaldi Vol. 3