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 0xa2b29ca307b6115bc64d3c5afc1c82769c2183c0090119326d8bd7019ad241cb. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/718b5ce9-10ae-47f9-9996-e81742a45db1.json and https://artists.proofprofile.net/proofs/artist/718b5ce9-10ae-47f9-9996-e81742a45db1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Absalon fili mi (Arr. Carp for 4 Bassons)
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 0x492c5b152826aa6540d841488bffc38091f507ca825a2fadcd321af6397c94d1. 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/DEC989200754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794f87ec8dde4e1cc6e9f7aaee0a4d5296243452aac9465b6b70af43914673a3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEC989200759.
Sonata for Bassoon and Cello in B-Flat Major, K. 292: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc95d04538590f4a91c2b804a47e64eacb9e48413a753e14d29e5763a7ef067f7. 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/DEC989200761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b244adc34b4116ab9b61371db43139a09bf327c76abb80ad0eabe7657ec6b1. 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/DEC989200771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c874367b45eaaf9aa7de382369b681bb565c21aa7186cd39a7902e624c34f7. 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/DEC989200772.
Milan Turkovic Conducts Vienna Radio Winds
Bassoon Concertos - Bach, J.C. / Kozeluch, J.A.
Bassoon Concerto in B-Flat Major, K. 191: II. Andante ma adagio (Cadenza: Zeman)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34947389ef31f4e2418e73c5ef23a862137dd0d1865e020dfba14fe9b7d822b2. 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/DEF057300841.
Bassoon Concerto in B-Flat Major, K. 191: III. Rondo. Tempo di menuetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c31d772cd093da384cec25d8f585156ae0112a3af50dba6dcd032d0659a64d. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEF057300842.
Partita in A Minor, BWV 1013: I. Allemande - Trans. in D Minor by William Waterhouse
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060916b030a488efbf4040db6e0528f6f2cae61dc07277a7e1dbe3a24c509445. 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/ATMA40501548.
Sonata for Bassoon and Basso Continuo in F Minor, TWV 41:f1: I. Triste
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x956a9f7986841345181658307825dc3990f9b06cf81c485e45fe499ac0b4fe39. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ATMA40501552.
Bachianas brasileiras No. 6, W392: I. Aria. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323f09dec00591f4a64b5a39dda967d708fb946912c6d34a31881da8ae190f4b. 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/ATMA40501567.
Sonata for Bassoon and Basso Continuo in F Minor, TWV 41:f1: III. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9077211044d58a07b4bdfff39e97e335e2c266f16371d159e6d17592e4eb791b. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATMA40501554.
Sonata for Bassoon and Basso Continuo in F Minor, TWV 41:f1: IV. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce90fb1578f79cc7861afcb9137c908d0dde22d3371db1a8864cea84d424b76b. 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/ATMA40501555.
Sonata for Bassoon and Basso Continuo in F Minor, TWV 41:f1: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83bb689a75ec4447133b7b6326ea241bebd2163f91dd595737d2391bc039b166. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/ATMA40501553.
Bassoon Concerto No. 6 in E Minor, RV 484: III. Allegro
Vivaldi: Concerti "Con molti istromenti"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea9783b77d24cf503539d850971bdc927f55673f04520675b52705e7d532fd3d. 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/DEF058602293.
Concerto for Oboe and Bassoon in G Major, RV 545: III. Allegro molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78854805be6041e956a5dd04bd31e38eea2d83b879214f767e36c389db7b82a8. 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/DEF058602323.
Spohr: Nonetto In F Major, Op. 31 / Martinu: Nonetto (1959)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aaa9c764ee996c12bc1caadf18c304e5e13d41d0005a546ad4ace4bdebe03e5. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEF058802823.