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 0xc42bf3ff19f7f7e1a0d9bf1cc299bbe644ef1040208e693858521af33da971c0. Chain 2 (Bitcoin): anchored in block 953857 (2026-06-15T23:34:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/02bd3c23-fad9-4cc2-b8ba-afb97e0ec7af.json and https://artists.proofprofile.net/proofs/artist/02bd3c23-fad9-4cc2-b8ba-afb97e0ec7af.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mozart & Brahms & Sulzer: Clarinet Quintets
Mozart: Clarinet Concerto in A Major, K. 622
Clarinet Concerto in A Major, K. 622: II. Adagio - Live
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 0x30dda2816b3e0a2fcad064afae183c7447b5719b8d91e49fc4f1ae56886b872f. 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/DEAQ71228002.
Clarinet Concerto in A Major, K. 622: III. Rondo. Allegro - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b70b0c063f7432de2a534b73b2eab120db168d2946d4514b95a76831268371. 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/DEAQ71228003.
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 0x4dde2397680df02b9a75aa24906a75bdd8e95d82f437bdae7e04ec40872abce9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ATB991400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb9cb64fc847e1deadce40ef8ce3927f7a18205c42492b929f40c948ffd1e4df. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ATB991400102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115caf1bfa01576314cf54b1637f6f373148e4ebc519fe0a246d3e23edd34da4. 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/ATB991400104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3cb54f394314c1331e41e897624762423eaee75b2a47574663e5b5039492676. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ATB991400105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa20acd13589db3ccd557250c6991223a3b9bc09a1813733f8d56471924734810. 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/ATB991400106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b92a6aac06152f9c39817bd4927584bcfbca582eaa2b4d50d907ee1a95fa776. 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/ATB991400107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb170f744a1c579b2ff03d96e1dbf2ed04e431b3a99a270461d53acfc6f196c58. 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/ATB991400108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0a2e4b6666fe2890626447e72ab8d07dc6ba48fc64be1d27177fad24c4f2b1. 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/ATB991400109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbbc52fbd175ece401f24d1c110973df2918ca317dd77bc7fda4c2ae84c594e7. 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/ATB991400110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a270d68bfbc67ad002ce318ad96cd759a9c13baed5f61fccf80c4db57d0aea. 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/ATB991400111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a7c14db231ab3c6adc3f81a98995f65fd54f98654bedc75fb14f0abe89f62f. 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/ATB991400112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31326a0b886154a6177e83c9e137cdd0223690e9ad45a14cd7f579f772ada507. 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/ATB991400114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ed88c95e64b33bd481f605d119003c4c8c82a7c348477d7abb26e618a2d954. 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/ATEW52301201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe585df98dec4f343c3e9c9eeee4febc4e1cee19c4058185b8b59122b17ea3f35. 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/ATEW52301206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x828062f95e73a2c459e4bfe7e0883830ad12a934f5f15ac8dece400c210aaa43. 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/ATEW52301207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf95c15370c78d34f1a0cde4e1b586374f6c80f6238269092f0db32359241d78c. 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/ATEW52301209.
Fascinating Rhythm (feat. Matthias Schorn & Lorenz Raab)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c4b98e1c46b977d822b0d44a281c6ebfcd4e874442a5d9ac902097bde76005. 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/ATEW52301205.
Trio Fantasie, Op. 63: I. Andante sostenuto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0896dd1108802f25ae8b0a2daf4b30a97e132ba2e908dd88bbea19668478a571. 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/GBJZY1829505.