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 0x477577f740b63db9f7852908793e77e732b8228c716ca389600a1f27f31a4565. Chain 2 (Bitcoin): anchored in block 953962 (2026-06-16T15:03:47Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/276cc630-a671-4aae-b6ab-10b26a1fc6e6.json and https://artists.proofprofile.net/proofs/artist/276cc630-a671-4aae-b6ab-10b26a1fc6e6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Violin Concerto No. 1, Op. 77 / In tempus praesens
Ich hatte viel Bekümmernis, BWV 21, Erster Teil: Sinfonia
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 0x57fd25e47081af795830474bb7d434a4cc6f921075318a4cb2ad0c035463c670. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/NLA460915411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361b579c309a5464df2a761abdc353196e1833436d2aea3a3941be2743c4dd2e. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/NLA460915412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefe5456181b7615a9a44bfe670134a05dbc284f969c2cb76ad6d39a535b4e4e0. 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/NLA460915413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4218e38733e742adb954a84276392b1d0c05a073da922d2cce33362de26a02b3. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/NLA460915414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d386a2ad9b16d91515159492551407df531ba66dfa7bee1d1b6bfab1966bf9. 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/NLA460915415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78dd7af2a29da59b2cddc2cfa0a436665a7a677f13a97502f298174c9e4ff973. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/NLA460915416.
Concerto for Violin and Oboe in C Minor, BWV 1060R (Version for Two Violins): I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2222fb2d119fa1426820f7ed6cdd18e4551f3fcfce42dbb6ef07eea156932a40. 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/NLA460915417.
Concerto for Violin and Oboe in C Minor, BWV 1060R (Version for Two Violins): II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7d81fa5be79ea79a2db3a758d85e32773653a578351abf1de5102373f86429. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/NLA460915418.
Concerto for Violin and Oboe in C Minor, BWV 1060R (Version for Two Violins): III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b630a4b8e7d70c1fa6cfc0f90ec48221c2f037467add757ad163d10bf2eab94. 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/NLA460915419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc353bcfa466f25b842881ec414a8acda2ebdf7b42ea69c47fc876a9a2d34778f. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/NLA460915420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf991643bbb0571b9be32b45d5623ac9b9165a51e8e7114f991127b387874e57. 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/FINDE2100103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa435a3bf739bfe03f973840f5b555f8324a1ee6e3bc15724acc1ef838f56ecc0. 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/FINDE2100104.
2 Sérénades (Arr. K. Aho for Violin & Orchestra): No. 1, Sérénade pour mon amour
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7187fad9d7c17c93371463128dfa75196c62b41fdfb1519ddf60244c398f34c0. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/FINDE2100105.
Spohr, L.: Violin Concertos Nos. 6, 8, 11
Bach: Ich hatte viel Bekümmernis, BWV 21, Erster Teil: Sinfonia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57fd25e47081af795830474bb7d434a4cc6f921075318a4cb2ad0c035463c670. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/NLA460915411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4deb7cf2d772a950732157c286f98317b418dafba9bc15a7d684f8cdf8d2c42f. 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/TCAFA2070192.
Salut d'amour, Op. 12 (version for violin and piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d117c17196209c06f66552fbec1520f5ff87b1e0d73f7b1be427848c0960cd9. 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/HKI199327606.
Cello Concerto in E Minor, Op. 85: I. Adagio - Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdaae1446e493e6d8bbd609d94850966216f87d3d804694656194fcb33d6af7c. 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/HKI199809001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa657bfcd60088ef528b9392e263ff3377cad3eda919ee5e1c2d1bb907070a4. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/HKI190029903.