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 0xfe1802fd52f3460a4e4331d462fa71657bb63b7195851333e7a046749016100a. Chain 2 (Bitcoin): anchored in block 953733 (2026-06-15T03:12:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/97bde23c-3bd6-4a7a-b586-df7c3ca24728.json and https://artists.proofprofile.net/proofs/artist/97bde23c-3bd6-4a7a-b586-df7c3ca24728.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Weihnachts-Oratorium, BWV 248, Pt. 1: Pt. I: Jauchzet, frohlocket, auf, preiset die Tage… (Chorus)
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 0xa9b2f66338829e58dfc4d22ec51f08755c6ca2a5e4215a068f8d681d2697eab8. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/USB8U1013360.
Weihnachts-Oratorium, BWV 248, Pt. 1: Pt. I: Recitative. Nun wird mein liebster Brautigam… (Alto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b738e3196fdf6d803321ef9f388698361dc967242cccba855d78ffd6e7d1d6. 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/USB8U1013362.
Weihnachts-Oratorium, BWV 248, Pt. 1: Pt. I: Aria. Bereite dich, Zion, mit zartlichen Trieben… (Alto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a05b38c23fac363d3f62c6bfb258760b77d47f26aa9bf4b83133c0b9ab02c5c. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USB8U1013363.
Weihnachts-Oratorium, BWV 248, Pt. 1: Pt. I: Choral. Wie soll ich dich empfangen (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab85a551e76632fdb64c033ef1f63eb12516f46f459fed749bcb8ee32f8ce73. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USB8U1013364.
Weihnachts-Oratorium, BWV 248, Pt. 1: Pt. I: Aria. Grosser Herr, o starker Konig… (Bass)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1755f22a3fedcc45f859cbd25e94c0160eecb7eff62d224e647512b9ff99b939. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USB8U1013367.
Weihnachts-Oratorium, BWV 248, Pt. 1: Pt. I: Choral. Ach, mein herzliebes Jesulein… (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a3f5ba79990c159e9f5fb2fb88762b374b193ef657c0394d26d903e860ca59. 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/USB8U1013368.
Weihnachts-Oratorium, BWV 248, Pt. 1: Pt. II: Sinfonia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5205cb22fe74a404052674063e851779255ffb9f1e881bf5c4a5cd2afb669a3a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USB8U1013369.