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 0xa673944960315b0654f3dbca862e93b819bbfa9d4ad77ca0da733ded4606abce. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4eaba7b6-62ba-4578-8b2e-79beb6410d98.json and https://artists.proofprofile.net/proofs/artist/4eaba7b6-62ba-4578-8b2e-79beb6410d98.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Gloria, RV 589: V. Domine Deus Rex coelestis
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 0x8853d7585d0e2463f2a255f73c9f2557e7691b3925d2e04e4d342ce25c4caff2. 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/FRZ131303080.
Purcell: The Fairy Queen, Z. 629, Act II. Song. "See, Even Night Herself Is Here"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e38f3e5e04b54d682f93b248318c3764816b2c9d872f7d4f948d115b4ae5ad3. 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/GBAYC9501751.
God Be in My Head - Sacred & Secular Treble Solos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8569d5dcd58d81970948a0318f1a7cd19a62d2f7be4e6033c9353ab818e6e13. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/CH6630670802.
Concerto for Four Violins and Cello in F Major, RV 567, Op. 3 No. 7: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa40dfabae566f6696438c91b5b85b6792876a1e7f2a7a5b5f9be01e39df02edf. 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/FR50X1219307.
Concerto for Four Violins and Cello in F Major, RV 567, Op. 3 No. 7: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f003cace27d0e075c8bba2595c097ce3b2c4c2ed8c494a1071537b75b01773. 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/FR50X1219308.
Concerto for Four Violins and Cello in F Major, RV 567, Op. 3 No. 7: IV. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0744f57c4f8db1d00e571a5ee2b86391184ca469f0e86cc3f128148a6db1f6. 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/FR50X1219309.
Concerto for Four Violins and Cello in B Minor, RV 580, Op. 3 No. 10: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4534bce4c08816542e504bc0e566a934e2f61919777a9302f8b52464d070385. 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/FR50X1219317.
Concerto for Four Violins and Cello in B Minor, RV 580, Op. 3 No. 10: II. Largo – Larghetto – Adagio – Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79eec111f399a4b425aa963a6a19cc0f1fbb52cbed64150fb4885a0ad2f564c7. 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/FR50X1219318.
Concerto for Four Violins and Cello in B Minor, RV 580, Op. 3 No. 10: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e9592702d1259cd97f52b90a443a1d58f74c420b5a7b3f6300d31fb7a3253d. 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/FR50X1219319.
Purcell: The Libertine, Z. 600: No. 1, Song. "Nymphs and Sheperds"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac29cc38c0ad01a107df06482da81e7f46619006ffe8d159574fabffa02ed2fc. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/GBAYC9501743.
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
Purcell: The Indian Queen, Z. 630, Act IV: "They Tell Us" - Fourth Act Tune - "To Suffer for Him" (Orazia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f479fcffaeff8682f9e87bf4179411f444f8e5667fcf9de454d014710cbaed. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GBAYC9501748.
Purcell: The Fairy Queen, Z. 629, Act III. Song. "When I Have Often Heard"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf7e2c111cbfccbfd2f34d1822c6159dc99570ab69d1958d84d87c83e3bc11a. 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/GBAYC9501771.
Purcell: Dido and Aeneas, Z. 626, Act III: Recitative. "Thy Hand, Belinda" - Song. "When I Am Laid in Earth" (Dido)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8cb577f98ecd84aec95067eb9fb54d4413833003e00e8821bb9cf79c4ae320a. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/GBAYC9501775.
Concerto for Four Violins and Cello in F Major, RV 567, Op. 3 No. 7: I. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931b0caf5dac664612dd4252c6140962c7caea47deaa2de8589e06b552056922. 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/FR50X1219306.