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 0xc9e60a57521ec345d20b5ad0e4904a6e1a214d105e7fd052ad1e3510113630ca. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7bd424b3-e8e3-4095-9657-0847d5412cbc.json and https://artists.proofprofile.net/proofs/artist/7bd424b3-e8e3-4095-9657-0847d5412cbc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Music for the Royal Fireworks: Suite HWV 351: I. Ouverture
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 0x84ca25ad67c9e29bd650dd7dcc8e5063c5bd2f56303bc9c88d8eae9b8fd571e7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEF058401011.
Music for the Royal Fireworks: Suite HWV 351: II. Bourrée
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9fb27b9631be8f3095fafe01c8d2628e873e89e555b5543d66155856eceb5e. 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/DEF058401012.
Music for the Royal Fireworks: Suite HWV 351: III. La Paix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88712755dbfdfafadd81a551c8c87ef20083d29624744ecced4e3ffd28d3db26. 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/DEF058401013.
Music for the Royal Fireworks: Suite HWV 351: IV. La Réjouissance
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd48353f18cd1ec09140166d2c38cb46cd192e6edfc5d42fbcaaad83004cdcd5c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEF058401014.
Music for the Royal Fireworks: Suite HWV 351: V. Menuet I
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf254195e0a06c553ca7a86ab900777ac8289a41e444722ce9c3a446ec4fc7a06. 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/DEF058401015.
Music for the Royal Fireworks: Suite HWV 351: VI. Menuet II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ec1ce1b70581c61ed3d65ad386995bb05971b3294908eaaedac24c63ca2ff3. 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/DEF058401016.
Concerto Grosso in C Major, HWV 318 "Alexander's Feast": I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcaf544cadffa6a7a6838b677c1ced843c92203a20a76c95b06a63d22f756461. 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/DEF058401501.
Concerto Grosso in C Major, HWV 318 "Alexander's Feast": II. Largo - Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe522dc82d21e59e07cb5c1c500392bd9b9b71c708e9e0362c1a91d8039af3b8b. 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/DEF058401502.
Concerto Grosso in C Major, HWV 318 "Alexander's Feast": III. Allegro - Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x591f8696d2fb4d577716ec8ea708d6acb05f1dc9646891a5d322a951866aeac5. 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/DEF058401503.
Concerto Grosso in C Major, HWV 318 "Alexander's Feast": IV. Andante non presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6603bb16190ef6c58c186863aeb8c0f54bdc28b6eb95959459110bf91629ab14. 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/DEF058401504.
Solomon, HWV 67 / Act III: Sinfonia "The Arrival of the Queen of Sheba"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x535fc18055d53930089aeb2dda83b08be87551ae11fa47e9bf33bea0494881c9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEF058401950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd897c1a81b6d536c2b25b062116dbe6345665d3023477765854cff9a42c11d3e. 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/DEF059030201.
Alceste, HWV 45 / Act I: Grand Entrée: Maestoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b47af18d7ab104b17cbf2147aaceadc419fc4e20a930aed6fbacc2a1b8c3c51. 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/DEF058501490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13768858e36f34dabecf6bf40b7bbdb50af90501d6956d7973fe72669e4818a2. 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/DEF058501521.
From Saul: Sinfonia, HWV 53: II. Larghetto - Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56464011953e4f22e9c27f83012e2452788b916b8681d89c1d8254b5d111204a. 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/DEF058501522.
From Saul: Sinfonia, HWV 53: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776e09792096d04b9aff21a7cef4846c80ccd6dee362912213e2b21e12dde2c2. 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/DEF058501523.
From Saul: Sinfonia, HWV 53: IV. Andante larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970014b5132971594e8d51d8a6b724e7bc49592690ba715dcb4ddbee9b29544a. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/DEF058501524.
From Samson / Act I: Sinfonia, HWV 57: I. Andante - Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7807be3d93436e119959072593adcd68c28ed4e3018f18fa8b47e917c94569d9. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/DEF058501551.
From Samson / Act I: Sinfonia, HWV 57: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77cbc8a650f8e99212b2abf25aafcb83e9ddf8948632c894085296d4bb9e5507. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DEF058501552.
From Samson / Act I: Sinfonia, HWV 57: III. Menuetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66647c38ec7e294797117bc54149328c77f6da7ec25ed6d6724b3488c1012ef3. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEF058501553.
Samson, HWV 57: No. 1, Symphony: a. Andante – Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7807be3d93436e119959072593adcd68c28ed4e3018f18fa8b47e917c94569d9. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/DEF058501551.
Samson, HWV 57: No. 1, Symphony: b. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77cbc8a650f8e99212b2abf25aafcb83e9ddf8948632c894085296d4bb9e5507. 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/DEF058501552.
Samson, HWV 57: No. 1, Symphony: c. Menuetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66647c38ec7e294797117bc54149328c77f6da7ec25ed6d6724b3488c1012ef3. 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/DEF058501553.