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 0x98bba604286a455fd50911c326234f2ae35a33058bd256d7352252cc5f88ab63. Chain 2 (Bitcoin): anchored in block 954063 (2026-06-17T07:49:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/480e00cb-53c5-41c2-aa04-0a777c47b52b.json and https://artists.proofprofile.net/proofs/artist/480e00cb-53c5-41c2-aa04-0a777c47b52b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
A Fancy: Fantasy on English Airs & Tunes
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 0x94194c676a144904a9fa4e9a38eff01941302645460184fd6ad4ee1592be56f2. 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/FR7JM1670040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d6003b845e8efddf75bd2e73f66732ee7f3a49a129a59534285b2909ff1892. 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/FR7JM1670050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11fbd5cdd22b3cd065773b18600dd0a503906edf0a2e0a286d74b8331241b349. 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/FR7JM1670080.
The Virtuous Wife, Z. 611: First Act Tune
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4a611a061fc06a7df9b0e741922926c86d3c97d5b2a1e29f54405efa93e7fe. 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/FR7JM1670100.
The Mock Marriage, Z. 605: Twas within a furlong of Edinboro’ town
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x213ccec6cfa11ec04705fd59fec0a3d3d0229e441c6b39108e54d55646cba287. 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/FR7JM1670110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9367d49d060b3c631d1d27be3c8e21776dfb8199303b38bfbdc7afe16603f9. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:11:49Z), 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/FR7JM1670170.
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 0x2fe4ecedc786da32727010416d0a8862f22e29c32df22ab0a957da91fb6d6024. 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/FR7JM1670010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45acd39857431df0fc72a51c95edade359d0cd27392cce2aa1296b44eb9935f8. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/FR7JM1670020.
Romulus and Hersilia: Where are thou, God of Dreams!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84bf4909dcbf3f3b52a6aa4c808ce0b110720cb5d513ee5ac83386bbaa6c2b5e. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/FR7JM1670030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92291c4d4a1d970c148996eb427a3b87324400be34b73e1144a94308afab5e7c. 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/FR7JM1670090.
Domenico Scarlatti: Stabat Mater & Other Works
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2356a1de4eb7f57215f617b5c4a1bcf592517e9c2e65b0967098846a94a3ab26. 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/FR7JM2174020.
Stabat Mater: IV. Eja Mater, fons amoris
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea6c56990eb073bd1bdc8d1b42d22ca0cb09b5fcd5fa840addf7468ed7a95d6. 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/FR7JM2174050.
Stabat Mater: V. Sancta Mater, istud agas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0dd0a772630079c3eacb73db2b70bfe03635ff4929d845d2db5de618813e5e5. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FR7JM2174060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d0a3c2a4415a4f8b77d32bd7cbf6e87a55d51ef08de447bbb0844367cf9539. 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/FR7JM2174080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6483222eee7f1bfdc3774c590dd11da03bee8ab9e50b33bc7869bf6119df10c. 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/FR7JM2174090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317d718b0558224d63db41a8b17725c31a1ab0dfd068d47705d9bb8ced059482. 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/FR7JM2174110.
O qual meco Nice cangiata: Sinfonia. Cantabile andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x067237c2b7f470c8584f0367eb8c1791efeade4d6917938276b4262f1544b3d7. 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/FR7JM2174190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bff7e4c7771903543e1eb47aa8aed2e613f441b1c0709f6e66a8058e8a2071a. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/FR7JM2174030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d3bdd3ca5861d6f540baa0eb2021c8c0c23c288dadc4a574e74a0170f5bb6ec. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/FR7JM2174040.
Stabat Mater: VI. Fac me vere tecum flere
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3152a695a9e760ce74b2d065da17f68db64d707d961e91b39db3846bc1bfcd38. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/FR7JM2174070.
Sonata in D Minor, K. 90 (Version for Violin and Continuo): I. Grave
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbdf25c5dce2e93d06ddfc81d9301f7cfd279113f79d1d56019b9bd0ad7771f1. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/FR7JM2174120.
Amor d'un'Ombra e Gelosia d'un'aura, Act I Scene 3: Sento, che a poco, a poco
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f8492baf2341144b82ca72531f0b4405a198da4fefe2ba6b2c14657cca04c3d. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/FR7JM2174170.