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 0xf7a1d1b8f397b98cdad9ff153c4faadc6ce235e1d41d1f327c63d0f591b1d360. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/140be28d-496c-4bb4-a14e-971d646996d2.json and https://artists.proofprofile.net/proofs/artist/140be28d-496c-4bb4-a14e-971d646996d2.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Antonio Vivaldi, Georg Muffat, Johann Pachelbel, Johann Sebastian Bach, Justin Heinrich Knecht & Wolfgang Amadeus Mozart: Die Gabler-Orgel in Weingarten
Concerto in H Moll, Op. 3, No. 10: "ohne Satzbezeichnung"
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 0x00088a06a5f35cef81e16ad05f9599a9b997e47e30ae4cd469b04b117cfd3201. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE219900701 — a six-check JSON result.
Concerto in H Moll, Op. 3, No. 10: Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a98e6d598852e0d5f577257209f88a67dc233d9379cee0c03afeff37c8e56a. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE219900702 — a six-check JSON result.
Concerto in H Moll, Op. 3, No. 10: Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd440fc4f9d1b7299fb9a39049f8db80390ab46aa5153b0e56c5cf22767547b. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE219900703 — a six-check JSON result.
Choralvariationen: Choralvariationen über "Christus, der ist mein Leben"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x902c701ecc327ccaa0852d026f5897ab7c45e583870589e3375287faac502494. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE219900704 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc68f53df871e540b62d87ab053336e470e9344247f93e7adb12955cc9cd44ce4. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE219900705 — a six-check JSON result.
Andante für eine Walze in einer kleine Orgel, KV 616
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x133d9c7f2c2382f21bf046b1930ed93772cc1255cc23e4f5ab5fdce318278e18. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE219900706 — a six-check JSON result.
"Apparatus Musico-Organisticus": Toccata septima
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f939ce87c069c8f5d4200e92177f0ccce20231d7a9cc1313b5cf2dd7ed130b4. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE219900707 — a six-check JSON result.
Choralbearbeitung aus der Leipziger Originalhandschrift, BWV 662: "Allein Gott in der Höh"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e2e4957a7e39437b59932cecacba5a27c234e6a1f98de4d43e9d722d78ecddc. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE219900709 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19cb7b2bc4e92b7ae4a2cf26075283cd86cd3910c2ce34d97eebce20127df6aa. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE219900710 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b0891d9fd44e4d9950e1df7a1d79e28cbd445d5517b4c84e1a623265f4efef. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE219900711 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b3d52f0e1e52ef978e1fe023ef1b18e68fb29bc7090f9fc8c9eb5b0cafc12e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE219900712 — a six-check JSON result.
Stylus Phantasticus (Toccatas written in the "stylus phantasticus" and variations on songs until Bach)
Orgelkonzert an 6 Holzhey-Orgeln mit 4 Organisten