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 0x860d4398444c6f531cf27f593a6b1a77e91ff93f03db9b63c6fa8be5dbdf7e1e. 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/2aedb66b-b979-49e7-9b45-af1d47671d8d.json and https://artists.proofprofile.net/proofs/artist/2aedb66b-b979-49e7-9b45-af1d47671d8d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Symphony No. 6 in D Major, Hob. I:6 "Le Matin": 1. Adagio - 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 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 0x13b52e96bd1669a457b10bc42233d6b503e2025e3bd8530bbc3040e233b1e450. 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/NLA507917901.
Symphony No. 6 in D Major, Hob. I:6 "Le Matin": 2. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c59f1fb1f9b4622408ff373ecbb36f37c78b896383fc41060cb07f8814d275. 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/NLA507917902.
Symphony No. 6 in D Major, Hob. I:6 "Le Matin": 3. Menuet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64aa6b50ce2ffe0e7f3ccd8948a8f9194186f5d20988faa858a0ddc0fff36f31. 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/NLA507917903.
Symphony No. 6 in D Major, Hob. I:6 "Le Matin": 4. Finale. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa95174a320b8ac012e527c3c48537712a1c6d076ff1b2528e70a45bb14ccb3. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/NLA507917904.
Symphony No. 7 in C Major, Hob. I:7 "Le Midi": 1. Adagio - Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b24c48e4ebd96d1a99c87d58df7de13c7de7956d4b9bbb41013954167836f6. 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/NLA507917905.
Symphony No. 7 in C Major, Hob. I:7 "Le Midi": 2. Recitativo. Adagio - Allegro - Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26bd8ff99bb46ca2761bb383864d13d267de46494a108710e8c471ecfadaffd3. 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/NLA507917906.
Symphony No. 7 in C Major, Hob. I:7 "Le Midi": 4. Menuetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b3655d57e52e3c0de524fd2e0031db3909f0903973ab4f880a535f9270535e. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/NLA507917908.
Symphony No. 7 in C Major, Hob. I:7 "Le Midi": 5. Finale. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe820bd69944cbc03776baee5e96ce7517fe9e753934f2a0007af00dcbbfe57. 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/NLA507917909.
Symphony No. 8 in G Major, Hob. I:8 "Le Soir": 1. Allegro molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf8d1372087725cd9aa833b015cc54aba8ca2c30c33d2eeb4719d4f5232fc65. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/NLA507917910.
Symphony No. 8 in G Major, Hob. I:8 "Le Soir": 2. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a7e89a87652ce00aaeeaf1c23470bf4d380a155cb68d74fd281919d8d8861c. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/NLA507917911.
Symphony No. 8 in G Major, Hob. I:8 "Le Soir": 4. Presto "La tempesta"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca6966f51341af2804af2435eea7a6addbb3086e24df4c32631dc1c314fe4302. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/NLA507917913.
Trio Sonata for 2 Violins and Continuo in G minor, Op. 5, No. 5, HWV 400: 5. Bourrée
Academy of St. Martin in the Fields Chamber Ensemble
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b699ec9775bd28e661aa4e99160500444997d105e3d4ed21a11a06a2bd879c. Chain 2 (Bitcoin): anchored in block 959981 (2026-07-28T14:27:50Z), 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/NLA507805757.
12 Violin Concertos, Op. 9 "La cetra" / Concerto No. 9 in B-Flat Major fo 2 Violins, RV 530: 2. Largo e spiccato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5cad03ad8466d30769f395726b413d0febf0e77a00c60564f7cc1ac81395c10. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/GBF077742626.
Trio Sonata for 2 Violins and Continuo in B flat, Op. 2, No. 3, HWV 388: 1. Andante - Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc546f446a80e250f30006600ee82bd7c0a58f1c0124c436c6ee38722965e49. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/NLA507805717.
Trio Sonata for 2 Violins and Continuo in B flat, Op. 2, No. 3, HWV 388: 2. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc321b46ed1a9d7cfc4f52416268dde1cf061a63f2039caa47f41c9c0968ca3e. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/NLA507805718.
Trio Sonata for 2 Violins and Continuo in B flat, Op. 2, No. 3, HWV 388: 3. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb4811ac741f24170ea2aa1db3e1f667adb5576b99dad3ecf06647d62d22fc7. 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/NLA507805719.
Trio Sonata for 2 Violins and Continuo in B flat, Op. 2, No. 3, HWV 388: 4. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e5cf613e08a2c9a1aebef9282b58870d52bb8a52e08bca7d756ff352306694a. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/NLA507805720.
Trio Sonata for Recorder, Violin and Continuo in F, Op. 2, No. 4, HWV 389: 1. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82188a2ad7f72a8704b828e30b2627da336abd00cfc7c49f705af4ac034d72d7. 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/NLA507805712.
Trio Sonata for Recorder, Violin and Continuo in F, Op. 2, No. 4, HWV 389: 2. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a79f07ab3000f0649af89fda2021f6aa7508be318b4767552a1cef6695a2d6. 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/NLA507805713.
Trio Sonata for Recorder, Violin and Continuo in F, Op. 2, No. 4, HWV 389: 3. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab18881b08b94906cc607d4294bfacbebc105ecc9c0f7b95193b0393ca2e1d3. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA507805714.
Trio Sonata for Recorder, Violin and Continuo in F, Op. 2, No. 4, HWV 389: 4. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00de2e1c271c7414cda700c0c7da96e4a614dbfbb971ece719d55f0e41e5f043. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/NLA507805715.
Trio Sonata for Recorder, Violin and Continuo in F, Op. 2, No. 4, HWV 389: 5. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72383d32792aceb6148ef66ad654a0bea6dfbc28394fccd31689cd17e74709b7. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/NLA507805716.
Trio Sonata for 2 Violins and Continuo in G minor, Op. 2, No. 5, HWV 390a: 1. Larghetto - Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e90f8910683c6d094c76d225a465cb97f6ac9a6b50914deab4f5fd10da5ef6c. 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/NLA507805721.
Trio Sonata for 2 Violins and Continuo in G minor, Op. 2, No. 5, HWV 390a: 2. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62120d0dc74d7683814d9e79f0365b02382e7627b29a1dcbdc424146756f8123. 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/NLA507805722.
Trio Sonata for 2 Violins and Continuo in G minor, Op. 2, No. 5, HWV 390a: 3. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1852b0e68e6e8c663e37343cd333eaff088ce74706d7b3f52fb28ff49d84d29. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/NLA507805723.
Trio Sonata for 2 Violins and Continuo in G minor, Op. 2, No. 5, HWV 390a: 4. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45a74af9de9d87c5ea0865148fdcbbf5270751e7bd88306efcce9f4a0db84ad. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/NLA507805724.
Sonata in F for 2 violons and continuo: 1. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e4335fc962b39cd289b88286f5d850ca818474ef53c2499730b2ed4a3680bb7. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/NLA507875777.
Sonata in F for 2 violons and continuo: 2. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0c08d9ee61bb8725f0bcc718e9a7ab41b2d7e63ff733094aac951dff76db53. 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/NLA507805778.
Sonata in F for 2 violons and continuo: 3. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f2f989b0460f8cb39d7e01a5abea711c87c2ec4214080e317549a1a12aa9b33. 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/NLA507805779.
Sonata in F for 2 violons and continuo: 4. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9c0287f4f0ebc2208e2f79e2ccc287cfdad681b69100f1684fb277d6e6779b. 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/NLA507805780.
Sonata in G minor for 2 violons and continuo: 1. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18fd22327662be102536077177729dc717a53092db2f91e739c4d686041aebf6. 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/NLA507805781.