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 0x2b402d03a390bbc13654560fd7b541781a9b5b74ad022f4fd57b08099c326e3d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/15027589-8206-401a-afd9-bc856d8ae8f0.json and https://artists.proofprofile.net/proofs/artist/15027589-8206-401a-afd9-bc856d8ae8f0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Hadley & Sainton: Choral and Orchestral Works
Handel: Concerto a due cori No. 1 in B-Flat Major, HWV 332: II. Allegro
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 0x376aeac79a4275b97a21a48f82ada3994584dd4892b74bb9ac72cff9f2d429c8. 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/GBAYC6800297.
Handel: Concerto a due cori No. 1 in B-Flat Major, HWV 332: I. Overture - Allegro ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16847e61767c41f2248756dc608fc7505a176fc4590f19a3b11cbe70d519663e. 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/GBAYC6800296.
Handel: Concerto a due cori No. 1 in B-Flat Major, HWV 332: III. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94fb8d16b5ae90cca61ed1b26424dc4f26e19f6b1c2571f2e6e9ffd06a68c63f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBAYC6800298.
Bach, JS: Violin Concerto No. 2 in E Major, BWV 1042: I. Allegro
The History of Classical Music: The Best of the Baroque Period
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c315cb6db4fefc9607dcca875a9aabedec29bb2136154a2ad8c896c31765e9f. 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/GBAYC8200230.
Handel: Concerto a due cori No. 1 in B-Flat Major, HWV 332: IV. A tempo ordinario - Alla breve. Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4027bc2f737103a687988cbb076ea506efba48f1f62e2938882715cc1743e7. 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/GBAYC6800299.
Handel: Concerto a due cori No. 1 in B-Flat Major, HWV 332: V. Menuet. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eec93a2c5855c3582c65e78eb0d6da6b9211b9f62312b3da8738c6b66e3a2bd. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBAYC6800300.
Violin Concerto in A Minor, BWV 1041: I. (No Tempo Indication)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a1b32b7eb9f17443991d6a2ec57a0beb3ff98684932d65092dbd7d1b495fe65. 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/GBAYC8200226.
Vivaldi: Magnificat in G Minor, RV 611: XI. Gloria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e48406f5e8bd7fce8af6f25841d49ad1598c00e3b9935133e44e707f78ee359. 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/GBAYC9801317.
Violin Concerto in E Major, BWV. 1042: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c315cb6db4fefc9607dcca875a9aabedec29bb2136154a2ad8c896c31765e9f. 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/GBAYC8200230.
Violin Concerto in A Minor, BWV 1041: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a1b32b7eb9f17443991d6a2ec57a0beb3ff98684932d65092dbd7d1b495fe65. 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/GBAYC8200226.
Bach, JS: Violin Concerto No. 1 in A Minor, BWV 1041: I. —
Concertos & Sonatas: Mozart, Bach, Brahms, Lalo, Franck...
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a1b32b7eb9f17443991d6a2ec57a0beb3ff98684932d65092dbd7d1b495fe65. 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/GBAYC8200226.
Bach, JS: Concerto for Two Violins in D Minor, BWV 1043: I. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce56e4c8085e46f05967583c9af62bd7ffc2f93db229cc84aaa7e4b283d2b686. 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/GBAYC8200132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a1b32b7eb9f17443991d6a2ec57a0beb3ff98684932d65092dbd7d1b495fe65. 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/GBAYC8200226.
Violin Concerto in E Major, BWV 1042: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb2dab9b3b8046538294972e20054d694fbcc6fcac5d51ced147edf653b7ff4f. 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/GBAYC8200231.
Concerto grosso in C, HWV 318 "Alexander's Feast": 1. Allegro
Handel: Oboe Concertos Nos.1-3/Concerto Grosso "Alexander's Feast" etc.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3feb4131f3d5401c5cbf64f062d4af22a6a3147d62010ff4e7628218b4a67793. 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/NLA507100308.
Concerto grosso in C, HWV 318 "Alexander's Feast": 2. Largo - Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cbe6317e866d52d1f1fbc3482b64d1349d069da2787e7245acf78ad5360e3b5. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/NLA507100309.
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
Bach, JS: Violin Concerto No. 1 in A Minor, BWV 1041: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc48247e7495d57f286105958239f2f3e6bfa738f2b334f1dcbd5ab32369c049a. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/GBAYC8200227.
Bach, JS: Violin Concerto No. 1 in A Minor, BWV 1041: III. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c3202b2fe8efa0f5ec2de2cd54e9f4813dbee451a083ea7c8231afea6d4a67. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8200228.
Concerto for Two Violins in D Minor, BWV 1043: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2eb5bc4742ba15a93b8c07279726206a8903ed7ae596bcc6f4884a969720e9. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/GBAYC8200134.
Concerto grosso in C, HWV 318 "Alexander's Feast": 3. Allegro - Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5141ac450838db13474bca985b59252a76a09952168efcd899590161a58d4a61. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/NLA507100310.