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 0x8b6cdd8a099598d5bc24466a1c7c7c4926086e1c2d8c07367957b60db047779d. Chain 2 (Bitcoin): anchored in block 953875 (2026-06-16T02:12:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0886c9c5-4b84-42e4-9f16-1cb80f5e7a07.json and https://artists.proofprofile.net/proofs/artist/0886c9c5-4b84-42e4-9f16-1cb80f5e7a07.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Handel: Der Messias, HWV 56, Pt. 2: Chor. "Hallelujah"
Radio-Sinfonieorchester Stuttgart des SWR
Pachelbel: Canon - Albinoni: Adagio - Bach: Air on G String - Mozart: Eine kleine Nachtmusik - Fauré: Pavane - Handel: Hallelujah from the Messiah & Other Classical Hits
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 0x2967580fa51367dcd9097b73ddb56bc154872ee4050a2a6a2e05e99d363af959. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DEC628400692.
Sanctus: Himmlische Klassik / Heavenly Classics
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2967580fa51367dcd9097b73ddb56bc154872ee4050a2a6a2e05e99d363af959. 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/DEC628400692.
Haydn: Die Schöpfung, Hob. XXI:2, Pt. 3: No. 34, Schlusschor. "Singt dem Herren alle Stimmen"
Handel: The Queen of Sheba - Bach: Brandenburg Concerto - Mozart: Jupiter Symphony - Rossini: The Barber of Seville - Grieg: Solveig's Song - Bizet: L'Arlésienne - Tchaikovsky: Waltz of the F
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9591c4c8a84bb48b2e7446e15ba072336f54a0a2bcaa49aa13cecb9575facfe2. 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/DEC628900517.