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 0x2499cae97041e794eaf796274317502505359634d33e75a14c6eb5295aac0440. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5cf555b0-9fee-42ad-86cb-adb4fd18c900.json and https://artists.proofprofile.net/proofs/artist/5cf555b0-9fee-42ad-86cb-adb4fd18c900.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Cäcilienmesse (Messe solennelle de Sainte Cécile) G-Dur: Kyrie
Charles Gounod: Cäcilienmesse (Messe solennelle en l'honneur de Sainte-Cécile)
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 0xab8f915af18481477485b56309244a9dfa4114bf7794997291239ec172bbb67a. 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/DEN421923006.
Cäcilienmesse (Messe solennelle de Sainte Cécile) G-Dur: Gloria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb90052a769fb4edba57947f4c552eb5d2b60e65d4b38b38aaf6b0871fbc379. 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/DEN421923007.
Cäcilienmesse (Messe solennelle de Sainte Cécile) G-Dur: Credo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c5ff04b0551fa37dfd0c8cf8168148c0b26063687a157a808ed8369cd22622e. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEN421923008.
Cäcilienmesse (Messe solennelle de Sainte Cécile) G-Dur: Offertorium
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d88703ad09d163f6384bc46ecaea46588200b0a8b3c7cda2b76f70cc23cd63. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DEN421923009.
Cäcilienmesse (Messe solennelle de Sainte Cécile) G-Dur: Sanctus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5356609821385720b7497bd71bce0ac7e5ea295c6ff6bc5cfcbb74b43472e4d0. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEN421923010.
Cäcilienmesse (Messe solennelle de Sainte Cécile) G-Dur: Benedictus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af3f50ea4ca94b5a40afb92418afeaac5c7ae8828ac92160d68e37d396d011a. 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/DEN421923011.
Cäcilienmesse (Messe solennelle de Sainte Cécile) G-Dur: Agnus Dei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67dba4ec2ff1acfae7934aa7ec00bc295a44db9707254fed147ad2122d0cea5. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/DEN421923012.
Cäcilienmesse (Messe solennelle de Sainte Cécile) G-Dur: Domine salvum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b90cb2ed3909a47b66fca4dd745bd94cb6e79ac22a7e8b5abbfc20b041cccb. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/DEN421923013.
St. John Passion, BWV 245: Part I: Chorale: Herr, unser Herrscher (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457b637bdf6197276d40fddeb1044f56619f5b385110b5b0e6c41c913714ee30. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/DECP61116001.
St. John Passion, BWV 245: Part I: Recitative: Jesus ging mit … - Jesum von Nazareth! - Jesus spricht … - Jesum von Nazareth! - Jesus antwortete (Evangelist, Jesus, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cab738a9156c27f7e7e435b8268c2245e35429a06e428b0682d1f4bf2b5c84a. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DECP61116002.
St. John Passion, BWV 245: Part I: Chorale: O grosse Lieb (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc817f9ee4818e329a0b18935b638e078dad68e9ae14d2fd03af635d763512d9. 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/DECP61116003.