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 0xf54df04c184a8215054d542901020837d2cff223c333b6d350702472cc37da6b. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6f46521f-8e18-4c5f-beeb-e88b8e67a754.json and https://artists.proofprofile.net/proofs/artist/6f46521f-8e18-4c5f-beeb-e88b8e67a754.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Symphonic Organ Music from Brussels and Paris, Franck, Gilson, Moulaert, Aubertin, Vierne
Die musikalische Welt des Hans Georg Nägeli
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 0xe7b312bdf4f247dbf9c727ab40ac80d6113be01150d22b7f2021124c78511f16. 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/DET901224401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab6c837760fb3ed80e510b8980103a3083468a1826d529eaf00b81add6d7ad87. 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/DET901224402.
Das Jahr: 12 Characterstucke: No. 1. January
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3354919021594af2544d80ced0cac7886aa11747e0a33bc22f47ce25bc8ca761. 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/DET901224403.
Das Jahr: 12 Characterstucke: No. 2. February
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060f46c723c13b62b94704dc11565f692472ae26f37a72f6c659f0d721b4e3d5. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/DET901224404.
Das Jahr: 12 Characterstucke: No. 3. March
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47b11da4f8a25a662816164bbaee4e51a440837725ac1d01417bcca0012d48c. 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/DET901224405.
Das Jahr: 12 Characterstucke: No. 4. April
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c60a9ffe00af8d05db8aed85d4d595f80a7fcbbf895cb189dbb416d7f06867. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/DET901224406.
Das Jahr: 12 Characterstucke: No. 5. May
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc205e188b3ce37c197630485929d64c8c9ccabd243cad288b4e0c832019a3b8c. 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/DET901224407.
Das Jahr: 12 Characterstucke: No. 6. June
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf30ed01bbaaffc21b3eecaeaf5a979d9111cba747fc6aaf1e50dd2a2bd94e72a. 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/DET901224408.
Das Jahr: 12 Characterstucke: No. 6. June (first version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbceaa354c2ac322da3e0cf61a7f0f61d9e4abca74f61fe7bc77947e1660de9be. 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/DET901224409.
Das Jahr: 12 Characterstucke: No. 7. July
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e64d4f86455cad2977c0230a75c8d5b52e4b04eef168be861273fd107ed813c. 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/DET901224410.
Das Jahr: 12 Characterstucke: No. 8. August
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a396c4084ee544c4d5e3f67835c8a861b41c988cee321393191a627dddcd8c. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DET901224411.
Das Jahr: 12 Characterstucke: No. 9. September
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce08e81994568d0d011651abee078acb418d5b113964d2324a8ef3ed86cef32. 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/DET901224412.
Das Jahr: 12 Characterstucke: No. 10. October
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x374ad788661f3831a569d990443d3caf3980c4857a363e78a8206fe8e66c67f7. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/DET901224413.
Das Jahr: 12 Characterstucke: No. 11. November
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca48086e1ab8ee724689a240896624f7caa822b9d8b1985808c0526006c2df6. 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/DET901224414.
Das Jahr: 12 Characterstucke: No. 12. December
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e36dad54301e789938a9eced0bb8c8ce68160d358c9daf2a4f888a155d75d2. 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/DET901224415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a61fcde39cecf9976ec7a3b26c893e5250c1652a34262dab8821311c706d2b. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DET901224416.
4 Lieder, Op. 6: No. 4. Il Saltarello Romano: Allegro molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f57b780ead5d81aaca99faa081bf6852eb25f91b4aecd12d82573af8240d39f. 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/DET901224417.