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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88690afca2776ec130a85fb39bd1d9eb7a18b8f9295fe9e27cbde3935cef442. Chain 2 (Bitcoin): anchored in block 953860 (2026-06-15T23:55:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/034927f1-d289-4459-8e00-cf1dbaaf3ad3.json and https://artists.proofprofile.net/proofs/artist/034927f1-d289-4459-8e00-cf1dbaaf3ad3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Antonio Maria Bononcini – La decollazione di San Giovanni Battista
Dixit Dominus in F Major, S. 44: No. 1, Dixit Dominus
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bcabcf6010fa6c28e7df2f3a3edaa70d9cdd4ce25c98c9965bf8711108e527b. 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/DECP92200301.
Kurpiński, Dobrzyński & Moniuszko: Orchestral Works
Żebrowski: Rorate caeli, Magnificat & Missa pastoritia (Live)
Gebel: Double String Quintet in D Minor - Schuberth: String Octet in E Major
The Seasons, Hob.XXI 3 Spring: No. 2, Come, Gentle Spring! (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf8a60f34b67191d74ea54241671c665b8fc025d62d6aaedd16ab5de09c3ea0. 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/GBLLH1748002.
The Seasons, Hob.XXI 3 Spring: No. 4, With Eagerness the Countryman Sets Forth (Song)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167a725368fc8959a6f35df1554e9e6b8c1d9bf54692b31a8e4fd53f9507c93c. 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/GBLLH1748004.
The Seasons, Hob.XXI 3 Spring: No. 1, See Winter, Stern and Gloomy, Flees (Introduction & Accompagnato)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5dc962b5860c9c19fdcbebff183b7fa2793e5802c5a2d646b33df28c607c62c. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBLLH1748001.
Mozart: Bella mia fiamma… - Concert Arias
Richter: Mesa Pastorale, Sinfonia in D & Magnificat
Keiser: Octavia: Ach! Nero ist nicht Nero mehr!...
Haydn: With Eagerness the Countryman Sets Forth
Haydn: See Winter, Stern and Gloomy, Flees
Haydn: From Aries Shines the Bright'ning Sun
Haydn: O What Charming Sights Delight Us
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf8a60f34b67191d74ea54241671c665b8fc025d62d6aaedd16ab5de09c3ea0. 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/GBLLH1748002.