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 0x9ba14e982234741ac52e7f487d7a73ca0a566fa08842f8ca6fd90926c5121466. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/08af299f-43cc-4316-80e7-f952146e9ee3.json and https://artists.proofprofile.net/proofs/artist/08af299f-43cc-4316-80e7-f952146e9ee3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Dance de las Hachas, IGS 6 (Arr. for Trio)
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 0x84980d83c0c4224edbc8e1c6d2a0cb68812f2be33a2a4f9773b59dd9f5e37b7c. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/AUMEV2512912.
The Dancing Master: An Italian Rant (Arr. for Trio)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24a98f805790393bee85c5177667c875143398693280be3f0e7fc8a4078a0ce. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/AUMEV2512925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e8448bb079a725a97ae66cdc028d3698de8b5f90453cce21f3ee7637db5d85. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/AUMEV2512928.
Suite in D Major, Op. 2 No. 1: I. Prelude (Arr. for Trio)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49982e61916f6c98424268d5522644796a17edfa8d4be747554f6927d0d81445. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/AUMEV2512936.
Violin Sonata in D minor 'La Folia', Op.5 No.12 (Arr. for Trio)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a3198492bb9d80fc31ab8ff673eb55ddfaa9a714ac9d4a8e434c416875d8f0a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/AUMEV2512939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a2088f75f92462a796dbf4a1f77d06ab9889b5d3262e3dfbfd5a3b01d2f686. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/AUMEV2512940.
Le musiche da cantar, No. 25: Piangono al pianger mio (Arr. for Trio)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed801fae9c91290e80c3ff237354d672125dbdb7a723bf9cd53f178600b3f415. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/AUMEV2512944.
Suite II du premier livre in G Major: IV. Sarabande. L'Ainée (Arr. for Trio)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a4d4d829eabc2bb107146b1d53f848df62a75ea3a7a4c7f8bb808e47e3b83b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/AUMEV2512952.
Terpsichore, Musarum Aoniarum: La Pavane de Spaigne (Arr. for Trio)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24cb15441a441076df53a011b51fee8fdc10e52e6266461626fe7664ba18300e. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/AUMEV2512954.
Flute Concerto No. 2 in C Minor: VI. Sarabande (Arr. for Trio)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbafd9972c24e188a4bd7bc79356268c7260dfa618bcceb0d7e2e157ff1cb657b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/AUMEV2513639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec6bcbc596df2ac0152375b726aca0e72b054bef6bee142afc209b428006dc91. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/AUMEV2513640.
Suite in B Minor, Op. 5, No. 4: V. Grave (Arr. for Trio)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f74eb4b2230984f54fa0f3264f74005bbe2aeb34272c493aaffaca3cf4c463. 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/AUMEV2513655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e687ce6b70c9ffba8e39714b4ead605900250d97572dbc5b34a5a35d6a24325. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/AUMEV2513665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x610c2979c258f7bdd262d48401bfa1d723c2f7dc3d9fb06474f319999e7a583f. 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/AUMEV2514443.
Airs et brunettes, IJH 17: Air de M. de Bousset (Arr. for Trio)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c859c5f213c55158c997a396a2bc5033382d7aa435ae8181eb7b9f10d5b4b74. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/AUMEV2514452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a037210723cb5e2864b8de4171cffa3fb02ed3488ab61f583343e82addeb7f. 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/AUMEV2514453.
Amarilli, mia bella, IGC 3 (Arr. for Trio)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa5e4d52a34248aef1913211f89284e8f5c53bde984bde70e9a3f75e4b3c6a2. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/AUMEV2514459.