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 0x30df679050855cb944a74be95363cb5027d6bfd803290ba8878ff30cf9716479. Chain 2 (Bitcoin): anchored in block 954650 (2026-06-21T04:51:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/db0dcc2a-5e9a-4f42-9898-65ef0aa96f0d.json and https://artists.proofprofile.net/proofs/artist/db0dcc2a-5e9a-4f42-9898-65ef0aa96f0d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Concerto for Cello and Strings No. 2 in D Major, G. 479: I. 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 0x959af12d4e3e0bf12c677a5a54c5fb55cf659faf33cf889f2f936c52d7e4328f. 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/NLY330606109.
Cello Concerto No. 12 in E-Flat Major, G. Deest: I. Allegro moderato - Maestoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3359e5f0d5b5a5f05fd0d32cfb5a1bcbefcafeb296d50e6d1104f59c21d5f04a. 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/US2Y30758911.
Cello Concerto No. 6 in D Major, G. 479: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf804c01320e9a4d378311a3c709b7f5b9ae8812955a15b971630bf9843b5415b. 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/US2Y30758901.
Cello Concerto No. 7 in G Major, G. 480: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc5cb17bed670f7fea544fef91e1bab6af80635fdfdc0927d1dca60a02212ca. 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/US2Y30758902.
Cello Concerto No. 5 in D Major, G. 478: I. Allegro con spirito
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f5b84c4f33d3faefb58188398f2e8c391becd9fde721128aa505c93490296e. 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/US2Y30758914.
Cello Concerto No. 5 in D Major, G. 478: III. Rondo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec9db85cb34e15091456e35114dc0122b4e8de125137cebb0a7259c98aa55c9f. 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/US2Y30758916.
Cello Concerto No. 4 in C Major, G. 477: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2616e766a80eaec21c68e2f7a8766ee92bfa65bce8d6a87cf4cadc72da03d431. 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/US2Y30758905.
Cello Concerto No. 4 in C Major, G. 477: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e4b84ffefdba7302fe119676952e0ab330c7f05699aed76155d898176c8f36. 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/US2Y30758906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x959af12d4e3e0bf12c677a5a54c5fb55cf659faf33cf889f2f936c52d7e4328f. 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/NLY330606109.
Concerto for Cello and Strings No. 2 in D Major, G. 479: III. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b7a2597cb22dc2edaa9b03ed9f38c4869193ea6854dd35814d987240d5a7aa. 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/NLY330606111.
Concerto for Cello and Strings No. 3 in G Major, G. 480: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x534eba538a1fc78fabbd383d47ee663c49378a00257fa60ff555a1b755780324. 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/NLY330606112.
Concerto for Cello, 2 Oboes, 2 Horns and Strings No. 12 in E-Flat Major, G. deest: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba539e712986da25bc9a0c4df1eddfb9618652cdd5a8d1616263cb35816596d. 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/NLY330606122.
Concerto for Cello, 2 Oboes, 2 Horns and Strings No. 8 in D Major, G. 478: I. Allegro con spirito
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9689e32229b5093b067fbd68ea8dd8e7b636a3602814fb7f4cd6609969cae5f4. 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/NLY330606124.
Concerto for Cello, 2 Oboes, 2 Horns and Strings No. 8 in D Major, G. 478: III. Rondò - Rondò - Comodo assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a568c4c9d46d8334f384a4c3b1bacf4cfd03a4653c2490eab0d5f1000e0b53d. 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/NLY330606126.