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 0xa8c2701a36acb33a758d88f314b443f6f39184c99614dbbf7532ee937c651273. Chain 2 (Bitcoin): anchored in block 954593 (2026-06-20T19:46:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/be98e7d6-4bc0-4150-8f23-27dbe1522d78.json and https://artists.proofprofile.net/proofs/artist/be98e7d6-4bc0-4150-8f23-27dbe1522d78.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x4a3a1ebce951ecbed78cb6f54a670462245f3a9932d40e4b789528bad50a7926. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/GBELX1606156.
Passacaglia della Vita (Arr. for 2 Sopranos, Mezzo-soprano and Ensemble by Jeannette Sorrell)
Le Tre Soprano: The Three Ladies of Ferrara
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf32a5c69d77cf0cf3d54303b913c2667cc2130dc51de15e660dcccdb3b0f024. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/GBELX2409191.
12 Madrigali per cantare e sonare: No. 8, O dolcezz' amarissime d'amore (Arr. for 2 Sopranos, Mezzo-soprano and Ensemble by Jeannette Sorrell)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb89eacc2826b1efd6710e8d6ff2799fb5b63a5dea8f1fbeea0f13814b2b159f6. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/GBELX2409194.
Theatrum Musicium: No. 7, O Felix Jucunditas (Arr. for 2 Sopranos, Mezzo-soprano and Ensemble by Jeannette Sorrell)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa63b780dd934bdf00cde476dec21c9ecab575e6770e01526286a3589576422c3. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/GBELX2409197.
12 Madrigali per cantare e sonare: No. 9, Troppo ben può questo tiranno Amore (Arr. for 2 Sopranos, Mezzo-soprano and Ensemble by Jeannette Sorrell)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc0b16a167312464e759428e2bfbe59b92850cf52420366f0b24cc7248db2de. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/GBELX2409384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa929ffd4ad2a84cab3161568abdae0036500b955963ad4ac91f6bc942408cbe0. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/GBELX2409385.
Un Sarao de la Chacona (Arr. for 2 Sopranos, Mezzo-soprano and Ensemble by Jeannette Sorrell)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08fa4b18e3347439e602bb84a08148dbbc0b7eeacef1f4ef0127d6cf73cfc25a. 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/GBELX2409206.
Passacaglia della Vita (Arr. for 3 Soprano & Ensemble by Jeannette Sorrell)
Stefano Landi: Passacaglia della Vita (Arr. for 3 Soprano & Ensemble by Jeannette Sorrell)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf32a5c69d77cf0cf3d54303b913c2667cc2130dc51de15e660dcccdb3b0f024. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/GBELX2409191.
The Mountains Of Rhùm (Arr. Jeannette Sorrell)
Sugarloaf Mountain: An Appalachian Gathering
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x436897f2b7aaf83aaab56ccdf96fe366600e58c644780ff85e4bb962c08c772c. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/GBELX1505832.
We'll Rant and We'll Roar (Arr. Jeannette Sorrell)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c6de5ad2ea2600bffa8c0f44b9255cc8728cf19b50d74560e8b80eb0bbe4b0. 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/GBELX1505834.
The Cruel Sister (Arr. Jeannette Sorrell)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65df45e58a6ddf0123e693b23d159fb9cd7e5d5c4e51713c727bb980e6e8b7f4. 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/GBELX1505835.
The Fox Went Out On A Chilly Night (Arr. Jeannette Sorrell)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9d806e6d66a00f947b0a0792e0724a37908cf99e70a556f35e33cbc07e1c94. 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/GBELX1505840.
Pretty Betty Martin / Katy Did / Red Rockin' Chair (Arr. Tina Bergmann)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7495799818af02fac05f5e734a0e863bf3e178634dfd7613435c8c239470e15. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/GBELX1505843.