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 0xee24baf08d27d2787ff3fbcd6d45f3784128b6c7a151292d9e922614b0cde3d2. 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/4c20dc86-8976-4faf-b45c-b019cbec8a0d.json and https://artists.proofprofile.net/proofs/artist/4c20dc86-8976-4faf-b45c-b019cbec8a0d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Folk Tales, Vol. 2: British & Irish Miniatures
Berceuse, H. 8 (Version for Cello & Piano)
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 0xed1f945956e680a43c14d6cc890e1933494f9b74370d4551ce93dac1139d7f51. 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/HKI192315401.
Serenade, H. 23 (Version for Cello & Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4993fb6f149e72e27f33b624b6c62e82a85dbfbc76641ccda862347bb325d6c. 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/HKI192315402.
Elegi, H. 47 (Version for Cello & Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92e98319007b5b80716a85050fe8c1a510c9f5a0ae1639294d17a3805e29c31. 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/HKI192315403.
Salut d'amour, Op. 12 (Arr. for Cello & Piano by Anonymous)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d848e25f933c46bc2da606dd16e116b8ad2b655f93ff8c28260b4a3105cb7c. 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/HKI192315404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa3eed35c470769da28cf88c423c7516b2f772ac17e3b6059d193d9cd8d0633. 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/HKI192315406.
I'll Bid My Heart Be Still (Version for Cello & Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a70bd907e6b8c41484a265264ba0b04e9ab9630a0ab9e2284e8d974f88d7b4. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/HKI192315407.
Spring Sorrow (Arr. for Cello & Piano by Julian Lloyd Webber)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d78b966833e30b1da581cb2058325a5603c8db428e4cba5dbd0f60d5bdd2f4. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/HKI192315410.
4 Preludes: No. 3, The Holy Boy (Version for Cello & Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6255d24bf98a37e436cc811ce4ff631c97c1988add9aefb27f2eb53645c524c1. 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/HKI192315411.
Down by the Salley Gardens (Arr. for Violin & Cello by Lynda O'Connor & Gerald Peregrine)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa549a1c44964fa3815b97237903fbc2fceb29455ad7b9eebef7ababcb521bc83. 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/HKI192315414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae0964f1e64fb25fdd8c8ac431d6225d894a838e2b8f16dfcfac0a99a2282c8. 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/HKI192315415.
The Coolin (Arr. for Cello by Michele Esposito & Gerald Peregrine)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dbb5a5674cccd4f3cbbbe3c24a7df8e83bf38df075305e317982ef4d58395b7. 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/HKI192315416.
She Moved Through the Fair (Arr. for Violin & Cello by Lynda O'Connor & Gerald Peregrine)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x327854787a7f8935ef42d35cf258d1982baba39957ce04b48ba1e0ae8eeafa17. 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/HKI192315417.
The Lark in the Clear Air (Arr. for Piano Trio by Thomas Christopher Kelly)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df6fd9f48204de8ac93d7f87f960dc342ea2924599a423b8fb47714a8daf7b4. 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/HKI192315418.
How Can the Tree but Wither? (Version for Cello & Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc513d6724a45397fa5ed6d4ac948aa41eee310a885874c687ecc053c419cba8a. 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/HKI192315420.