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 0xd9fbab669494efaa04a92fe95a476dfe046b0c6d47f08ee61c0d4e4273804a68. Chain 2 (Bitcoin): anchored in block 953736 (2026-06-15T03:21:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/99182b9b-77a1-4ca5-a9ef-c2c913f98e4c.json and https://artists.proofprofile.net/proofs/artist/99182b9b-77a1-4ca5-a9ef-c2c913f98e4c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
American Classics: Stephen Foster/ Charles Tomlinson Griffes / Aaron Copland
Sure on This Shining Night: The Romantic Song in America
All My Heart: Deborah Voigt Sings American Songs
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 0x227704ae1baf5bb64e07fd1c91b8bc6d81b007140d6c0d8b1a00f4d45264da28. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/SEAEQ1379070.
Griffes: Pleasure Dome of Kubla Khan / The White Peacock
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x758223faa50b51883b230320eefe528f319f8777058194c2b33a44e28c6c4071. 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/USASX0860810.
Die Kunst der Fingerfertigkeit, Op. 740: No. 24 in A-Flat Major, Molto vivace con velocità
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67176dfd4ad0d790522db011c332f4dce70c2dc11af0422bc0a1b636a9187f7a. 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/AUFFF1800111.
Etüden, Op. 32: No. 7 in A Major, Andante con sentimento
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc779317443c43225ecc01faf2c7e65b12da7bcbf309127843a255e8134ce4ddd. 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/AUFFF1800112.
From Rags to Riches: 100 Years of American Song (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e42e66e37fd35ab457fd84c716e8f3d4a7346fb5f322b408517131e0db463cd. 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/AU3SE2100491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59165d468e6528ea852975040786505dcf2a37b58265929afc314b8eb13b7c8. 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/AU3SE2100496.
Griffes: The Vale of Dreams, Piano Music
Roman Sketches, Op. 7: III. The Fountain of the Acqua Paola
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa053d71d9ea4de019e742e39f5791eef028805846938a9df1b7fae11b248e9. 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/NLY331700047.
3 Tone-Pictures, Op. 5 (version for piano): No. 1. The Lake at Evening
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbceeca189d9bb4129b2fca69d9fcefa237c420bffbd3413df54deb203ded6048. 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/US8271100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83bf47063bca6ac69414c421db6c3c6205e642c628a8207650592fdc1e4f0875. 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/US8271100013.
Griffes: 3 Tone Pictures / De Profundis / Sonata
Charles Tomlinson Griffes: Collected Works for Piano
Griffes: The White Peacock (Recorded 1946)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ec892b8bef6bc4dd25ba5acf320873389c6e9699c770f52e95fac01cf14941. 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/FR9W11832807.
Barber - Four songs, op. 13: Sure on this shining night
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b472abdf710bf67b53d93805eef7322343504ccc8cd022289c14a6b9491af0. 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/GBGCS0500224.
Anthology of American Piano Music, Vol. 2 - American Nocturnes
Hermit Thrush, Op. 92: No. 2, A Hermit Thrush at Morn
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb945f88b8f9acf74e8ea3fe3e318ff583b349abfb74a92288ecebd053a78948. 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/DKECA1708409.
Songs by 20th Century American Composers
The Complete Solo & Concerto Studio Recordings (Recorded 1928-1957)
The Sylvan Winds Perform Music of the Gilded Age
Howard Hanson conducts American Masterworks
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5308fcb0a910e0f40e3f5e9e173b7f8aebfe7c943b03eb7c4cb98cdc0759f80. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USSM10502639.
Taylor: Through the Looking Glass - Griffes: Poem - The Pleasure Dome of Kubla Khan